Rotundaria Agassiz, 1852
‘Rafinesque’ of Authors.
Agassiz, 1852, Arch. Naturg. 18(1): 48.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 765.
Ortmann, 1909, Ann. Carnegie Mus. 5: 201.
Ortmann, 1910, Nautilus 23(11): 140.
Ortmann, 1912, Ann. Carnegie Mus. 8: 257.
Simpson, 1914, Descr. Cat. Naiades: 811.
Utterback, 1915, Amer. Midl. Nat. 4(4): 149.
Ortmann, 1918, Proc. Amer. Phil. Soc. 57(6): 543.
Haas, 1929, Senckenbergiana 11: 333.
Haas, 1930, Senckenbergiana 12(6): 319.
(reference to Rotundaria Rafinesque, 1820)
Type species: Obliquaria (Rotundaria) tuberculata Rafinesque, 1820 () = Cyclonaias tuberculata

Caelatura Conrad, 1853
‘Conrad’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 267 [as ‘Cælatura’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 820 [as ‘Cælatura’].
Pallary, 1909, Mém. Inst. Égypte 6(1): 76.
Simpson, 1914, Descr. Cat. Naiades: 1019.
Germain, 1918, Bull. Mus. Hist. Nat. 24: 41.
Germain, 1919, Bull. Mus. Hist. Nat. 25: 122.
Germain, 1921, Faun. malac. Terr. e Fluv. Iles Mascareignes: 403.
Pallary, 1924, Mém. Inst. Égypte 7 (n.s.): 42.
Pilsbry & Bequaert, 1927, Bull. AMNH 53: 399.
Haas, 1927, Senckenbergiana 9: 21.
Haas, 1929, Senckenbergiana 11: 111.
Bloomer, 1932, Proc. Malac. Soc. London 20: 168.
Thiele, 1934, Handb. Syst. Weichtierk. 3: 1248.
Haas, 1936, Abh. Senckenb. Naturf. Ges. 431: 54.
Dartevelle & Schwetz, 1937, Ann. Soc. Roy. Zool. Belgique 68: 60.
Haas, 1940, Zool. Ser. Field Mus. Nat. Hist. 24: 140.
Modell, 1942, Arch. Moll. 74(5/6): 190.
Bloomer, 1946, Proc. Malac. Soc. London 27: 68.
Bloomer, 1949, Proc. Malac. Soc. London 27: 241.
Franc, 1949, J. de Conch. 9: 158.
Leloup, 1950, Res. Sci. Explor. Hydrob. Lac Tanganyika (1946-1947) 3: 40.
Mongin, 1963, Mém. Soc. Géol. France 96: 10.
Modell, 1964, Arch. Moll. 93: 116.
Mandahl-Barth, 1968, Expl. Hydrobiol. Bangweulu-Luapula 12: 51.
Starobogatov, 1970, Fauna Moll. Continent.: 64.
Fischer-Piette & Métivier, 1974, Bull. Mus. Hist. Nat. 133: 10.
Appleton, 1979, Ann. S. Afr. Mus. 77(9): 154.
Kenmuir, 1980, Trans. Zimbabwe Sci. Assoc. 60(2): 7.
Curtis & Appleton, 1987, Jour. SWA Sci. Soc. 40-41: 50.
Ibrahim et al., 1999, EEAA Nat. Biodiv. Unit (10): 74.
Millard, 2001, Class. Moll. (3): 1061.
(incorrect original spelling of Coelatura Conrad, 1853)

Lepidodesma Simpson, 1896
Simpson, 1896, Proc. U.S. Nat. Mus. 18: 311.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 586.
Simpson, 1914, Descr. Cat. Naiades: 237.
Type species: Unio languilati Heude, 1874 (sub. desig. by Simpson, 1900: 586) = Lepidodesma languilati

Micronaias Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 743.
Simpson, 1914, Descr. Cat. Naiades: 714.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio aratus Lea, 1843 (orig. desig.) = Micronaias arata

Cucumeria Simpson, 1900
‘Conrad’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 889.
Thiele, 1934, Handb. Syst. Weichtierk. 3: 817 [1246].
(error for Cucumaria Conrad, 1853)

Nepronaias Simpson, 1900
‘Crosse & Fischer’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 591.
(error for Nephronaias Fischer & Crosse, 1894)

Plethobasus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 764.
Simpson, 1914, Descr. Cat. Naiades: 805.
(intro'd as sub-gen. of Pleurobema Rafinesque, 1819)
Type species: Unio aesopus Green, 1827 (original designation) = Plethobasus cyphyus

Zaira Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862.
(error for Zairia Rochebrune, 1886)

Callonaia Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 867.
Simpson, 1914, Descr. Cat. Naiades: 1210.
Type species: Castalia duprei Récluz, 1842 (orig. desig.) = Callonaia duprei

Virgula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 931.
Simpson, 1914, Descr. Cat. Naiades: 1454.
(intro'd as sub-gen. of Glabaris Gray, 1847)
Type species: Anodon ensiformis Wagner, 1827 (original designation) = Lamproscapha ensiformis

Castaliella Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 866.
Simpson, 1914, Descr. Cat. Naiades: 1208.
Type species: Castalia sulcata Krauss, 1849 (orig. desig.) = Castaliella sulcata

Cafferia Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 824.
Simpson, 1914, Descr. Cat. Naiades: 574.
(intro'd as sub-gen. of Nodularia Conrad, 1853)
Type species: Unio caffer Krauss, 1848 (orig. desig.) = Unio caffer

Bullella Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 672.
Simpson, 1914, Descr. Cat. Naiades: 508.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Margaritana arcula Lea, 1838 (orig. desig.) = Alasmidonta arcula

Pressodonta Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 667.
Simpson, 1914, Descr. Cat. Naiades: 495.
(intro'd as sub-gen. of Alasmidonta Say, 1818; new name for Hemiodon Swainson, 1840)
Type species: Unio calceolus Lea, 1828 (orig. desig.) = Pressodonta viridis

Chelidoneura Simpson, 1900
‘Rochebrune’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 906 [corrected on the errata sheet].
Germain, 1908, Bull. Mus. Hist. Nat. 14: 160, footnote.
(error for Chelidonura Rochebrune, 1886)

Rugifera Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 670.
Simpson, 1914, Descr. Cat. Naiades: 504.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Alasmidonta marginata Say, 1818 (orig. desig.) = Alasmidonta marginata

Lapidosus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 700.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio lapidosus Kobelt, 1893 (original designation) = Disconaias disca

Pegias Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 660.
Simpson, 1914, Descr. Cat. Naiades: 472.
Type species: Margaritana fabula Lea, 1838 (orig. desig.) = Pegias fabula

Arcidens Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 661.
Simpson, 1914, Descr. Cat. Naiades: 475.
Type species: Alasmodonta confragosa Say, 1829 (orig. desig.) = Arcidens confragosus

Bulloideus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 887.
Simpson, 1914, Descr. Cat. Naiades: 1286.
(intro'd as sub-gen. of Diplodon Wagner, 1827)
Type species: Unio bulloides Lea, 1859 (original designation) = Diplodon variabilis

Cyclomya Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 885.
Simpson, 1914, Descr. Cat. Naiades: 1278.
(intro'd as sub-gen. of Diplodon Wagner, 1827)
Type species: Unio funebralis Lea, 1860 (orig. desig.) = Diplodon funebralis

Laevirostris Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894 [as ‘Lævirostris’].
Simpson, 1914, Descr. Cat. Naiades: 1308.
(intro'd as sub-gen. of Diplodon Wagner, 1827)
Type species: Unio stagnorum Dautzenberg, 1890 (orig. desig.) = Coelatura stagnorum

Pterosygna Simpson, 1900
‘Rafinesque’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 665.
Ortmann, 1909, Ann. Carnegie Mus. 5: 196.
Simpson, 1914, Descr. Cat. Naiades: 490.
Ortmann, 1914, Nautilus 28(4): 43.
Walker, 1918, Occ. Pap. Mus. Zool. Univ. Mich. (49): 2.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 147.
Haas, 1930, Senckenbergiana 12(6): 326.
(error for Pterosyna Rafinesque, 1831)

Pseudavicula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 860.
Simpson, 1914, Descr. Cat. Naiades: 1190.
(homonym of Hudleston, 1890; renamed Prisodontopsis Tomlin, 1928)
Type species: Unio (Metaptera) johnstoni E.A. Smith, 1893 (orig. desig.) = Prisodontopsis aviculaeformis

Dromus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 614.
Simpson, 1914, Descr. Cat. Naiades: 341.
(homonym of Selby, 1840 [Aves]; renamed Dromas Lindahl, 1906; renamed Conchodromus Haas, 1930)
Type species: Unio dromas Lea, 1834 (orig. desig.) = Dromus dromas

Medionidus Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 77.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 588.
Simpson, 1914, Descr. Cat. Naiades: 245.
Type species: Unio conradicus Lea, 1834 (orig. desig.) = Medionidus conradicus

Symphynota Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 662.
Ortmann, 1912, Ann. Carnegie Mus. 8: 280.
Simpson, 1914, Descr. Cat. Naiades: 480.
Ortmann, 1914, Nautilus 28(4): 41.
(reference to Symphynota Lea, 1829)
Type species: Symphynota compressa Lea, 1829 (orig. desig.) = Platynaias compressa

Pseudoon Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 601 [as ‘Pseudoön’].
Simpson, 1914, Descr. Cat. Naiades: 298.
(intro'd as sub-gen. of Obovaria Rafinesque, 1819)
Type species: Unio ellipsis Lea, 1828 (original designation) = Obovaria olivaria

Hyriana Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 872.
Simpson, 1914, Descr. Cat. Naiades: 1223.
(intro'd as sub-gen. of Prisodon Schumacher, 1817)
Type species: Unio ortonii Lea, 1868 (original designation) = Prisodon obliquus

Hemilastena Simpson, 1900
‘Agassiz’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 673.
‘Agassiz’ Simpson, 1914, Descr. Cat. Naiades: 323.
(reference to Hemilastena Agassiz, 1852)
Type species: Alasmodonta ambigua Say, 1825 (orig. desig.) = Simpsonaias ambigua

Spathopsis Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 857.
Simpson, 1914, Descr. Cat. Naiades: 1179.
(intro'd as sub-gen. of Lamellidens Simpson, 1900)
Type species: Anodonta guillaini Récluz, 1850 (orig. desig.) = Chambardia wahlbergi

Pilsbryoconcha Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 587.
Simpson, 1914, Descr. Cat. Naiades: 239.
Type species: Anodonta exilis Lea, 1838 (orig. desig.) = Pilsbryoconcha exilis

Dalliella Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 832.
(homonym of Cossmann, 1895 [Gastro.]; renamed Simpsonella Cockerell, 1903)
Type species: Anodonta purpurea Valenciennes, 1827 (orig. desig.) = Simpsonella burroughiana

Hemiodonta Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 667, footnote.
(error for Hemidonta Swainson, 1840)

Cylindrica Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 807.
Simpson, 1914, Descr. Cat. Naiades: 958.
(homonym of Clessin, 1882 [Gastro.]; intro'd as sub-gen. of Nodularia Conrad, 1853; renamed Pericylindrica Tomlin, 1930)
Type species: Nodularia cylindrica Simpson, 1900 (orig. desig.) = Lanceolaria cylindrica

Pseudobaphia Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 849.
Simpson, 1914, Descr. Cat. Naiades: 1138.
(intro'd as sub-gen. of Parreysia Conrad, 1853)
Type species: Unio biesianus Heude, 1877 (orig. desig.) = Pseudobaphia biesiana

Discomya Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 802.
Simpson, 1914, Descr. Cat. Naiades: 937.
(intro'd as sub-gen. of Quadrula Rafinesque, 1820)
Type species: Unio radulosus Drouët & Chaper, 1892 (orig. desig.) = Discomya radulosa

Clione Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 583.
Simpson, 1914, Descr. Cat. Naiades: 223.
(error for Cleone Gistl, 1848)

Pletholophus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 585.
Simpson, 1914, Descr. Cat. Naiades: 229.
(intro'd as sub-gen. of Cristaria Schumacher, 1817)
Type species: Symphynota discoidea Lea, 1834 (original designation) = Pletholophus tenuis

Crassitesta Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 586.
Simpson, 1914, Descr. Cat. Naiades: 236.
(intro'd as sub-gen. of Cristaria Schumacher, 1817)
Type species: Cristaria (Crassitesta) radiata Simpson, 1900 (original designation) = Cristaria radiata

Arcidopsis Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 861.
Simpson, 1914, Descr. Cat. Naiades: 1191.
Type species: Unio footei Theobald, 1876 (orig. desig.) = Arcidopsis footei

Trapezoideus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 858.
Simpson, 1914, Descr. Cat. Naiades: 1180.
Type species: Unio foliaceus Gould, 1843 (orig. desig.) = Trapezoideus foliaceus

Ctenodesma Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 852.
(renamed Cristadens Simpson, 1914)
Type species: Unio borneensis Issel, 1874 (orig. desig.) = Ctenodesma borneensis

Epilobasma Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
(error for Epioblasma Rafinesque, 1831)

Caudiculatus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 581.
Simpson, 1914, Descr. Cat. Naiades: 218.
(intro'd as sub-gen. of Hyriopsis Conrad, 1853)
Type species: Unio caudiculatus Martens, 1867 (orig. desig.) = Caudiculatus caudiculatus

Acuticosta Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 850.
Simpson, 1914, Descr. Cat. Naiades: 1139.
(intro'd as sub-gen. of Parreysia Conrad, 1853)
Type species: Unio chinensis Lea, 1868 (orig. desig.) = Acuticosta chinensis

Schistodesmus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 803 [as ‘Shistodesmus’].
Simpson, 1914, Descr. Cat. Naiades: 939.
(correct name for Shistodesmus Simpson, 1900)
Type species: Unio (Dysnomia) lampreyanus Baird & Adams, 1867 (orig. desig.) = Schistodesmus lampreyanus

Lamprotula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 796.
Simpson, 1914, Descr. Cat. Naiades: 913.
(intro'd as sub-gen. of Quadrula Rafinesque, 1820)
Type species: Chama plumbea Dillwyn, 1817 (orig. desig.) = Lamprotula plumbea

Gibbosula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 804.
Simpson, 1914, Descr. Cat. Naiades: 941.
Type species: Mya crassa Wood, 1815 (original designation) = Gibbosula crassa

Sulcataria Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 673.
(error for Sulcularia Rafinesque, 1831)

Ptychoderma Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 606.
Simpson, 1914, Descr. Cat. Naiades: 306.
(intro'd as sub-gen. of Plagiola Rafinesque, 1819)
Type species: Unio cyrenoides Philippi, 1847 (original designation) = Arotonaias cyrenoides

Physunio Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 830.
Simpson, 1914, Descr. Cat. Naiades: 1062.
Type species: Unio gravidus Lea, 1856 (orig. desig.) = Physunio superbus

Lens Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 831.
Simpson, 1914, Descr. Cat. Naiades: 1067.
(intro'd as sub-gen. of Physunio Simpson, 1900)
Type species: Unio eximius Lea, 1856 (orig. desig.) = Lens eximius

Pseudomutela Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 905.
Simpson, 1914, Descr. Cat. Naiades: 1362.
(intro'd as sub-gen. of Mutela Scopoli, 1777)
Type species: Mycetopus plicatus Sowerby, 1868 (orig. desig.) = Mutela dubia

Pseudospatha Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 577.
Simpson, 1914, Descr. Cat. Naiades: 202.
(new name for Burtonia Bourguignat, 1883)
Type species: Spatha tanganyicensis E.A. Smith, 1880 (orig. desig.) = Pseudospatha tanganyicensis

Rectidens Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 853.
Simpson, 1914, Descr. Cat. Naiades: 1157.
Type species: Unio prolongatus Drouët, 1894 (orig. desig.) = Rectidens sumatrensis

Ptychobranchus Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 79.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 612.
Simpson, 1914, Descr. Cat. Naiades: 332.
Type species: Unio phaseolus Hildreth, 1828 (orig. desig.) = Ptychobranchus fasciolaris

Radiatula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 820.
Simpson, 1914, Descr. Cat. Naiades: 1016.
(intro'd as sub-gen. of Nodularia Conrad, 1853)
Type species: Unio crispisulcatus Benson, 1862 (orig. desig.) = Radiatula crispisulcata

Fusconaia Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 784.
Simpson, 1914, Descr. Cat. Naiades: 865.
(intro'd as sub-gen. of Quadrula Rafinesque, 1820)
Type species: Unio trigonus Lea, 1831 (orig. desig.) = Fusconaia flava

Aurora Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 849.
(homonym of Ragonot, 1887 [Lepid.]; intro'd as sub-gen. of Parreysia Conrad, 1853; renamed Diaurora Cockerell, 1903)
Type species: Unio auroreus Heude, 1883 (orig. desig.) = Diaurora aurorea

Ptychorhynchus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 850.
Simpson, 1914, Descr. Cat. Naiades: 1144.
Type species: Unio pfisteri Heude, 1874 (orig. desig.) = Ptychorhynchus pfisteri

Shistodesmus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 803 [also as ‘Shistodesma’].
(incorrect original spelling of Schistodesmus Simpson, 1900)

Lamellidens Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 854.
Simpson, 1914, Descr. Cat. Naiades: 1165.
Type species: Unio marginalis Lamarck, 1819 (orig. desig.) = Lamellidens marginalis

Suborbiculus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 835.
Simpson, 1914, Descr. Cat. Naiades: 1081.
(intro'd as sub-gen. of Pseudodon Gould, 1844)
Type species: Monocondylus orbicularis Morelet, 1866 (orig. desig.) = Pseudodon cambodjensis

Nasus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 839.
Simpson, 1914, Descr. Cat. Naiades: 1099.
(homonym of Basilewski, 1855 [Pisces]; intro'd as sub-gen. of Pseudodon Gould, 1844; renamed Simpsonasus Bolotov et al., 2023)
Type species: Monocondylea nankingensis Heude, 1874 (orig. desig.) = Simpsonasus nankingensis

Triquetrana Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 869.
Simpson, 1914, Descr. Cat. Naiades: 1215.
(intro'd as sub-gen. of Hyria Lamarck, 1819)
Type species: Unio stevensii Lea, 1871 (original designation) = Triplodon corrugatus

Pilea Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 522.
Simpson, 1914, Descr. Cat. Naiades: 22.
(intro'd as sub-gen. of Truncilla Rafinesque, 1819)
Type species: Unio personatus Say, 1829 (original designation) = Epioblasma personata

Bineurus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 839.
Simpson, 1914, Descr. Cat. Naiades: 1097.
(intro'd as sub-gen. of Pseudodon Gould, 1844)
Type species: Monocondyloea mouhotii Lea, 1863 (orig. desig.) = Bineurus mouhotii

Obovalis Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 840.
Simpson, 1914, Descr. Cat. Naiades: 1101.
(intro'd as sub-gen. of Pseudodon Gould, 1844)
Type species: Pseudodon loomisi Simpson, 1900 (orig. desig.) = Obovalis omiensis

Virgus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 851.
Simpson, 1914, Descr. Cat. Naiades: 1150.
Type species: Unio (Diplodon) beccarianus Tapparone Canefri, 1883 (orig. desig.) = Virgus beccarianus

Cuneopsis Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 804.
Simpson, 1914, Descr. Cat. Naiades: 943.
Type species: Unio celtiformis Heude, 1874 (orig. desig.) = Cuneopsis celtiformis

Chamberlainia Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 582.
Simpson, 1914, Descr. Cat. Naiades: 219.
Type species: Unio hainesianus Lea, 1856 (orig. desig.) = Chamberlainia hainesiana

Anodonta pennsylvanica Stark, 1828
‘Lamarck’ of Authors.
Stark, 1828, Elements Nat. Hist. 2: 89.
Lea, 1836, Synopsis Fam. Naiades: 50.
Lea, 1838, Synopsis Fam. Naiades: 30.
Lea, 1852, Synopsis Fam. Naiades: 49.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 263.
Sowerby, 1867, Conch. Icon. 17: pl. 11, sp. 30.
Lea, 1870, Synopsis Fam. Naiades: 79.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 618.
Ortmann & Walker, 1922, Occ. Pap. Mus. Zool. Univ. Mich. (112): 40.
Frierson, 1927, Check List N. Amer. Naiades: 22 [as ‘Strophitus undulatus-pennsylvanicus’].
Haas, 1969, Das Tierreich 88: 373 [as ‘Strophitus undulatus pennsylvanicus’].
(error for Anodonta pensylvanica Lamarck, 1819)

Quadrula lachrymosa Swainson, 1840
‘Lea’ of Authors.
Swainson, 1840, Treat. Malacol.: 378.
Hanley, 1843, Illustr. Descr. Cat. Rec. Bivalve Shells: 177.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 256.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 497.
Reeve, 1864, Conch. Icon. 16: pl. 9, sp. 33.
Call, 1895, Trans. Acad. Sci. St. Louis 7: 21.
F.C. Baker, 1898, Bull. Chicago Acad. Sci. 3(1): 83, pl. 25, fig. 1; pl. 12, fig. 2.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 776.
Call, 1900, Ind. Dept. Geol. Nat. Res. (1899): 489.
Ortmann, 1909, Nautilus 22(10): 100.
Ortmann, 1909, Ann. Carnegie Mus. 5: 199.
Ortmann, 1910, Nautilus 23(11): 140.
Ortmann, 1910, Nautilus 23: 116.
Ortmann, 1912, Ann. Carnegie Mus. 8: 253.
Simpson, 1914, Descr. Cat. Naiades: 839, 841.
Vanatta, 1915, Proc. Acad. Nat. Sci. 67: 556.
Ortmann & Walker, 1922, Occ. Pap. Mus. Zool. Univ. Mich. (112): 14, 16.
Frierson, 1927, Check List N. Amer. Naiades: 47.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 84.
R.I. Johnson, 1980, Bull. MCZ 149(2): 90.
Vidrine, 1993, Histr. Distr. Freshw. Mussels LA: 53.
Strayer & Jirka, 1997, Pearly Mussels NY (26): 98.
(error for Unio lacrymosus Lea, 1828)

Margaritana curreyana Lea, 1842
‘Lea’ of Authors.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: pl. 18, fig. 40.
Agassiz, 1852, Arch. Naturg. 18(1): 47.
Lea, 1852, Synopsis Fam. Naiades: 42.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 263.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 499.
Sowerby, 1868, Conch. Icon. 16: pl. 63, sp. 319.
Lea, 1870, Synopsis Fam. Naiades: 68.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [6].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 661.
Simpson, 1914, Descr. Cat. Naiades: 474.
Frierson, 1927, Check List N. Amer. Naiades: 21.
Haas, 1969, Das Tierreich 88: 395.
(error for Margaritana curreyiana Lea, 1840)

Diplodon parallelipipedon d’Orbigny, 1846
‘Lea’ of Authors.
d’Orbigny, 1846, Voyage dans l’Amérique Méridionale 5: 609.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 884.
Corsi, 1900, Anais Mus. Nac. Montevideo 2: 447.
Simpson, 1914, Descr. Cat. Naiades: 1274-1275.
Haas, 1930, Senckenbergiana 12: 189.
Morretes, 1949, Arqu. Mus. Paranaense 7: 18.
Parodiz, 1968, Sterkiana 30: 8.
Mansur, 1970, Iheringia 39: 83.
Quintana, 1982, Rev. Mus. Argentino Zoológicas 11: 128.
Simone, 2006, Land. Freshw. Moll. Brazil.: 260.
(error for Unio parallelopipedon Lea, 1834)

Anodonta ohioensis Agassiz, 1852
‘Rafinesque’ of Authors.
Agassiz, 1852, Arch. Naturg. 18(1): 46.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 648.
Simpson, 1914, Descr. Cat. Naiades: 437.
Oesch, 1984, Missouri Naiades: 183 [as ‘Potamilus’].
(error for Anodonta (Lastena) ohiensis Rafinesque, 1820)

Unio bigorrensis Lea, 1852
‘Millet’ Lea, 1852, Synopsis Fam. Naiades: 39.
‘Millet’ Küster, 1861, Conchyl. Cab. 9(2): 230.
‘Millet’ Lea, 1870, Synopsis Fam. Naiades: 63.
‘Locard’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 692.
(error for Unio bigerrensis Millet, 1843)

Pseudanodonta grateloupiana Lea, 1852
‘Gassies’ of Authors.
Lea, 1852, Synopsis Fam. Naiades: 49.
Lea, 1870, Synopsis Fam. Naiades: 77.
Bourguignat, 1880, Mater. Moll. Acécphales Syst. Europ. 1: 15, 29.
Westerlund, 1890, Fauna Paläarct. Binnenconch. 2(7): 303.
Locard, 1890, Contr. Faune Malacol. Franc. 14: 55 [11].
Servain, 1890, Bull. Soc. Malac. France 7: 301.
Locard, 1893, Coqu. Eau Douce Saumâtre France: 217.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 264.
(error for Anodonta gratelupeana Gassies, 1849)

Unio planilaterus Lea, 1852
‘Conrad’ of Authors.
Lea, 1852, Synopsis Fam. Naiades: 32.
Lea, 1870, Synopsis Fam. Naiades: 51.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [4].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 722.
Simpson, 1914, Descr. Cat. Naiades: 653.
(error for Unio planilateris Conrad, 1838)

Unio hippopaeus Lea, 1852
‘Lea’ of Authors.
Lea, 1852, Synopsis Fam. Naiades: 21 [as ‘hippopæus’].
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 261 [as ‘hippopæus’].
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 497 [as ‘hippopæus’].
Reeve, 1864, Conch. Icon. 16: pl. 11, sp. 40 [as ‘hippopæus’].
Lea, 1870, Synopsis Fam. Naiades: 31 [as ‘hippopæus’].
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [3], [as ‘hippopæus’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 767 [as ‘hippopæa’].
Ortmann, 1909, Nautilus 22(10): 101 [as ‘Q. hippopæa’].
Ortmann, 1909, Ann. Carnegie Mus. 5: 203 [as ‘Quadrula undulata hippopæa’].
Simpson, 1914, Descr. Cat. Naiades: 816 [as ‘hippopæa’].
Frierson, 1927, Check List N. Amer. Naiades: 61.
Haas, 1969, Das Tierreich 88: 287.
Clarke, 1973, Malacologia 13(1-2): 35.
Burch, 1975, Freshw. Unio. North Amer.: 165.
Strayer & Jirka, 1997, Pearly Mussels NY (26): 98.
He & Zhuang, 2013, Freshwater Bivalves China: 27.
(error for Unio hippopoeus Lea, 1845)

Unio sowerbyanus Küster, 1852
‘Lea’ of Authors.
Küster, 1852, Conchyl. Cab. 9(2): 62.
Agassiz, 1852, Arch. Naturg. 18(1): 43.
Reeve, 1864, Conch. Icon. 16: pl. 14, sp. 58.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 520.
Simpson, 1914, Descr. Cat. Naiades: 17.
Frierson, 1927, Check List N. Amer. Naiades: 94.
Haas, 1969, Das Tierreich 88: 483.
Burch, 1975, Freshw. Unio. North Amer.: 173.
R.I. Johnson, 1978, Bull. MCZ 148: 280.
Parmalee & Bogan, 1998, The Freshwater Mussels of Tennessee: 91.
(error for Unio sowerbianus Lea, 1834)

Diplodon beskeanus Lea, 1852
‘Dunker’ of Authors.
Lea, 1852, Synopsis Fam. Naiades: 39, Corrigenda et Addenda.
Lea, 1870, Synopsis Fam. Naiades: 61.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 875.
Ihering, 1910, Abh. Senckenb. Naturf. Ges. 32: 139.
Figueiras, 1965, Comm. Soc. Malac. Uruguay 1(8): 238.
Parodiz, 1968, Sterkiana 30: 3.
(error for Unio besckeanus Dunker, 1849)

Unio reevianus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 256.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 538.
Simpson, 1914, Descr. Cat. Naiades: 74.
Utterback, 1916, Amer. Midl. Nat. 4(10): 449.
Frierson, 1927, Check List N. Amer. Naiades: 73.
Haas, 1969, Das Tierreich 88: 437.
R.I. Johnson, 1980, Bull. MCZ 149(2): 132.
Oesch, 1984, Missouri Naiades: 225.
Turgeon et al., 1988, Am. Fisher. Soc. Spec. Publ. (16): 31.
Williams et al., 1993, Fisheries 18(9): 12.
Turgeon et al., 1998, Am. Fisher. Soc. Spec. Publ. (26): 35.
Graf & Cummings, 2007, J. Moll. Studies 73: 305.
Bogan, 2010, FADA: [web].
Cummings & Graf, 2010, Ecol. Class. N. Amer. FW Inverts.: 376.
Haag, 2012, N. Amer. Freshw. Mussels: 71 [as ‘Lampsilis reeviana’].
(error for Unio reeveianus Lea, 1852)

Anodonta linneana Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 264.
Hanley, 1856, Cat. Rec. Bivalve Shells, Suppl.: 387.
Sowerby, 1870, Conch. Icon. 17: pl. 35, sp. 144.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 646.
Simpson, 1914, Descr. Cat. Naiades: 431.
Frierson, 1927, Check List N. Amer. Naiades: 14.
Haas, 1969, Das Tierreich 88: 364.
Parmalee & Bogan, 1998, The Freshwater Mussels of Tennessee: 206.
Watters et al., 2009, Freshw. Mussels OH: 260.
(error for Anodonta linnaeana Lea, 1852)

Unio hanleyanus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 250.
Sowerby, 1866, Conch. Icon. 16: pl. 46, sp. 249.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [3].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 759.
Simpson, 1914, Descr. Cat. Naiades: 780.
Frierson, 1927, Check List N. Amer. Naiades: 42, sp. 175.
Haas, 1969, Das Tierreich 88: 256.
Burch, 1975, Freshw. Unio. North Amer.: 13.
Turgeon et al., 1988, Am. Fisher. Soc. Spec. Publ. (16): 32.
Williams et al., 1993, Fisheries 18(9): 13.
Parmalee & Bogan, 1998, The Freshwater Mussels of Tennessee: 184.
Lydeard et al., 1999, Gulf Mex. Sci. 17(2): 129.
(error for Unio hanleyianus Lea, 1852)

Anodonta marryattana Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 264.
Sowerby, 1870, Conch. Icon. 17: pl. 28, sp. 111.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 642.
Simpson, 1914, Descr. Cat. Naiades: 422.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 157.
Haas, 1969, Das Tierreich 88: 365.
(error for Anodonta maryattana Lea, 1840)

Unio texasensis Lea, 1860
‘Lea’ of Authors.
Lea, 1860, Jour. Acad. Nat. Sci. 4 [O. 8]: 359.
Lea, 1870, Synopsis Fam. Naiades: 59.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [5].
Pilsbry & Rhoads, 1896, Proc. Acad. Nat. Sci. 48: 505.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 563.
Ortmann, 1915, Nautilus 28(12): 141.
Utterback, 1916, Amer. Midl. Nat. 4(9): 398.
Gordon et al., 1979, Bull. AMU (1979): 35, Table 3.
Cummings & Mayer, 1992, Freshw. Mussels Midwest (5): 134.
Vidrine, 1993, Histr. Distr. Freshw. Mussels LA: 169.
R.I. Johnson, 1999, Occ. Pap. Moll. 6(77): 34.
Bogan, 2010, FADA: [web].
ITIS, 2012, ITIS: [web].
Haag, 2012, N. Amer. Freshw. Mussels: 70 [as ‘Toxolasma texasensis’].
McMurray et al., 2012, Mo. Freshw. Mussels: 57 [as ‘Toxolasma texasense’].
Marshall et al., 2018, Amer. Malac. Bull. 36(1): 44.
(error for Unio texasiensis Lea, 1857)

Unio virginana Reeve, 1865
‘Lamarck’ of Authors.
Reeve, 1865, Conch. Icon. 16: pl. 27, sp. 139.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 536.
(misidentified reference to Unio virginiana Lamarck, 1819)

Anodonta arcuata Martens, 1866
‘Cailliaud’ of Authors.
Martens, 1866, Malak. Blatt. 13: 11.
Jickeli, 1874, Nova Acta Dtsch. Akad. Naturf. 37(1): 265.
Servain, 1890, Bull. Soc. Malac. France 7: 316.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 899.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
Simpson, 1914, Descr. Cat. Naiades: 1336.
Van Damme, 1984, Freshw. Moll. N. Africa (25): 68.
Mandahl-Barth, 1988, Studies on African Freshwater Bivalves: 73.
Ibrahim et al., 1999, EEAA Nat. Biodiv. Unit (10): 109.
(error for Anodonta arcuta Cailliaud, 1823)

Spatha cailliaudi Martens, 1866
‘von Martens’ of Authors.
Martens, 1866, Malak. Blatt. 13: 102.
Lea, 1870, Synopsis Fam. Naiades: 89.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 896.
Pallary, 1909, Mém. Inst. Égypte 6(1): 83.
Simpson, 1914, Descr. Cat. Naiades: 1316.
(error for Spatha caillaudi Martens, 1866)
Type(s): SYNTYPES MNHN_MP_0196, Le Nil.

Anodonta nicaragua Tate, 1870
Philippi of Authors.
Tate, 1870, Amer. J. Conch. 5: 161.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [7].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 932.
Haas, 1930, Senckenbergiana 12(6): 324.
(error for Anodonta nicaraguae Philippi, 1849)

Glabaris leotandi Lea, 1870
‘Guppy’ of Authors.
Lea, 1870, Synopsis Fam. Naiades: 83.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [7] [as ‘Anodonta leotandi’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 929.
(error for Anodon leotaudi Guppy, 1866)

Unio bissellianus Lea, 1870
‘Lea’ of Authors.
Lea, 1870, Synopsis Fam. Naiades: 50.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 743.
Simpson, 1914, Descr. Cat. Naiades: 714.
Frierson, 1927, Check List N. Amer. Naiades: 35.
Haas, 1969, Das Tierreich 88: 210.
(error for Unio bisselianus Lea, 1867)

Anodon kellettii Lea, 1870
‘Sowerby’ of Authors.
Lea, 1870, Synopsis Fam. Naiades: 84.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 588.
Preston, 1912, Rec. Ind. Mus. 7: 282.
Simpson, 1914, Descr. Cat. Naiades: 242.
Brandt, 1974, Arch. Moll. 105: 264.
(error for Anodon kelletii Sowerby, 1867)

Unio lawleyanus Kobelt, 1884
‘Gentiluomo’ of Authors.
Kobelt, 1884, Icon. Land- und Süssw.-Moll. 1: 65.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 683.
Simpson, 1914, Descr. Cat. Naiades: 533.
Haas, 1940, Zool. Ser. Field Mus. Nat. Hist. 24: 127.
(error for Unio lawleyianus Gentiluomo, 1868)

Unio hazelhurstianus B.H. Wright, 1888
‘Lea’ of Authors.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [3].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 719 [as ‘Unio (sec. Elliptio) hazelhurstianus’].
Simpson, 1914, Descr. Cat. Naiades: 648.
Frierson, 1927, Check List N. Amer. Naiades: 29 [as ‘Elliptio (Elliptio) hazelhurstianus’].
Haas, 1969, Das Tierreich 88: 229 [as ‘Elliptio (Elliptio) hazelhurstianus’].
R.I. Johnson, 1970, Bull. MCZ 140(6): 333.
Burch, 1975, Freshw. Unio. North Amer.: 164.
(error for Unio hazlehurstianus Lea, 1858)

Anodonta arkansasensis B.H. Wright, 1888
‘Lea’ of Authors.
B.H. Wright, 1888, Check List N. Amer. Unionidae etc.: [6].
Call, 1895, Trans. Acad. Sci. St. Louis 7: 60.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 617.
Simpson, 1914, Descr. Cat. Naiades: 347.
Williams et al., 2008, Freshw. Mussels AL and Mobile Basin: 709.
Watters et al., 2009, Freshw. Mussels OH: 294.
(error for Anodonta arkansensis Lea, 1852)

Pseudodon mabillei Morlet, 1889
‘Rochebrune’ of Authors.
Morlet, 1889, J. de Conch. 37: 166.
Fischer, 1891, Bull. Soc. Hist. Nat. Autun 4: 220.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 840.
(error for Pseudodon mabilli Rochebrune, 1882)

Margaritana vignoniana Paetel, 1890
‘Bernardi’ of Authors.
Paetel, 1890, Cat. Conch.-Samml. 3: 174.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 902.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
Simpson, 1914, Descr. Cat. Naiades: 1347.
Modell, 1964, Arch. Moll. 93: 84.
(error for Margaritana vignouana Bernardi, 1859)

Columba blainvilleana Ihering, 1890
‘Lea’ of Authors.
Ihering, 1890, Arch. Naturg. 56(1): 142.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 915.
Simpson, 1914, Descr. Cat. Naiades: 1400.
Haas, 1931, Senckenbergiana 13: 102.
Morretes, 1949, Arqu. Mus. Paranaense 7: 28.
Bonetto, 1963, Physis 24: 11.
Parodiz & Bonetto, 1963, Malacologia 1(2): 206.
Modell, 1964, Arch. Moll. 93: 81.
Figueiras, 1965, Comm. Soc. Malac. Uruguay 1(8): 252.
Haas, 1969, Das Tierreich 88: 577.
Haas, 1969, Treatise on Invert. Paleo: N465.
Mansur, 1970, Iheringia 39: 55.
Bonetto & Mansur, 1970, Acta Zool. Lilloana 27: 256.
Millard, 2001, Class. Moll. (3): 1074.
Simone, 2006, Land. Freshw. Moll. Brazil.: 289.
(error for Anodonta blainvilliana Lea, 1834)

Anodonta intermerata Paetel, 1890
‘Heude’ of Authors.
Paetel, 1890, Cat. Conch.-Samml. 3: 183.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 639.
Preston, 1912, Rec. Ind. Mus. 7: 284.
Simpson, 1914, Descr. Cat. Naiades: 405.
(error for Anodon intemerata Heude, 1885)

Unio subluridus Simpson, 1892
Simpson, 1892, Proc. U.S. Nat. Mus. 15(911): 432, pl. 83, figs. 3-4.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 743.
Type(s): HOLOTYPE USNM_104002, Orange Springs, Volusia Co., Florida.

Unio popeii Fischer & Crosse, 1894
of Authors.
Fischer & Crosse, 1894, Miss. Sci. Mexique, Rech. Zool. 2(16): 605 [as ‘Unio (Graphonaias) popei’].
Martens, 1900, Biol. Centr.-Amer., Moll.: 504 [as ‘Unio (Nephronaias) popei’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 738 [as ‘Unio (sec. Elliptio)’]. [in part]
Pilsbry, 1910, Proc. Acad. Nat. Sci. 61: 535. [in part]
Ortmann, 1912, Ann. Carnegie Mus. 8: 271 [as ‘Elliptio’].
Simpson, 1914, Descr. Cat. Naiades: 700 [as ‘Unio (sec. Elliptio)’]. [in part]
Frierson, 1927, Check List N. Amer. Naiades: 38 [as ‘Elliptio (Popenaias)’]. [in part]
Haas, 1929, Senckenbergiana 11: 330 [as ‘Elliptio (Popenaias)’]. [in part]
Haas, 1969, Das Tierreich 88: 201 [as ‘Nephronaias (Popenaias)’]. [in part]
Graf & Cummings, 2007, J. Moll. Studies 73: 308 [as ‘Popenaias’]. [in part]
Pfeiffer et al., 2019, Zool. Scripta 48: 504 [as ‘Popenaias’]. [in part]
(misidentified reference to Unio popeii Lea, 1857)

Unio mitchelli Dall, 1895
Simpson in Dall, 1895, Proc. U.S. Nat. Mus. 18: 5.
Simpson, 1896, Proc. U.S. Nat. Mus. 18: 371, pl. 32, figs. 1-3.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 711.
Simpson, 1914, Descr. Cat. Naiades: 622.
Type(s): LECTOTYPE USNM_128364, Guadalupe R., Victoria Co., Texas.

Unio (sec. Elliptio) gibbosus var. delicatus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 704.
Simpson, 1914, Descr. Cat. Naiades: 600.
(intro'd as intra-sp. of Unio gibbosus Barnes, 1823; homonym of Unio delicatus Lea, 1863)
Type(s): LECTOTYPE USNM_128797, St. Francis R., Greenway, Clay Co., Arkansas.

Tritogonia tuberculata var. obesa Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 609.
Simpson, 1914, Descr. Cat. Naiades: 320.
(intro'd as intra-sp. of Unio tuberculatus Barnes, 1823)
Type(s): LECTOTYPE USNM_125669, Neches River, Big Eddy, Texas.

Margaron (Unio) nashvilliensis Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 547.
(error for Lampsilis nashvillensis Agassiz, 1852)

Nodularia bohmi Simpson, 1900
‘Martens’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 823.
‘Martens’ Simpson, 1914, Descr. Cat. Naiades: 1036.
(error for Unio boehmi Martens, 1897)

Quadrula (Discomya) radulosa var. rhomboidea Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 803.
Simpson, 1914, Descr. Cat. Naiades: 938.
(intro'd as intra-sp. of Unio radulosus Drouët & Chaper, 1892)
Type(s): HOLOTYPE (MONOTYPY) USNM_126472A, Sebroeang, Borneo.

Unio newenhuisi Simpson, 1900
‘Schepman’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 803.
(error for Unio nieuwenhuisi Schepman, 1898)

Unio musicus Simpson, 1900
‘Spengler’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
(error for Unio musivus Spengler, 1793)

Unio navigoliformis Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 825.
‘Lea’ Simpson, 1914, Descr. Cat. Naiades: 575.
(error for Unio navigioliformis Lea, 1859)

Anodon salwiniana Simpson, 1900
‘Gould’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 834.
(error for Anodon salweniana Gould, 1844)

Anodon salwimana Simpson, 1900
‘Gould’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 836.
(error for Anodon salweniana Gould, 1844)

Unio forscali Simpson, 1900
‘Parreyss’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862. [nomen nudum]
‘Parreyss’ Simpson, 1914, Descr. Cat. Naiades: 1192. [nomen nudum]

Brazzaea jourdyi Simpson, 1900
‘Bourguignat’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 907.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 1374.
Simpson, 1914, Descr. Cat. Naiades: 1374.
(error for Brazzaea jouberti Bourguignat, 1886)

Unio sula Simpson, 1900
‘Theobald’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 678.
‘Theobald’ Simpson, 1914, Descr. Cat. Naiades: 521.
(intro'd as syn of Unio laosensis Lea, 1863)

Brazzaea lavigerina Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 907.
‘Bourguignat’ Simpson, 1914, Descr. Cat. Naiades: 1374.
(error for Brazzaea lavigeriana Bourguignat, 1886)

Anodonta dignota Simpson, 1900
‘Rafinesque’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 631 [as by Férussac], 648.
‘Rafinesque’ Simpson, 1914, Descr. Cat. Naiades: 387 [as by Férussac], 437.
(error for Anodonta (Flexiplis?) digonota Rafinesque, 1831)

Quadrula (sec. Fusconaia) kirtlandiana var. minor Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 791.
Simpson, 1914, Descr. Cat. Naiades: 892.
(intro'd as intra-sp. of Unio kirtlandianus Lea, 1834)
Type(s): LECTOTYPE USNM_150155, Scott Co., Va.

Unio crocodilarum Simpson, 1900
‘Morelet’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 702.
Simpson, 1914, Descr. Cat. Naiades: 591.
Haas, 1929, Senckenbergiana 11: 332.
(error for Unio crocodilorum Morelet, 1849)

Quadrula (Lamprotula) ovata Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 801.
Simpson, 1914, Descr. Cat. Naiades: 933.
(new name for Unio vestitus Heude, 1883)

Unio penisatus Simpson, 1900
‘Crosse & Fischer’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 853.
Haas, 1912, Conch. Cab. 9 (pt. 2, h. 46): 135.
Simpson, 1914, Descr. Cat. Naiades: 1155.
(error for Unio pensitatus Fischer & Crosse, 1894)

Shistodesmus spinosus Simpson, 1900
Heude, 1883, Conch. Fluv. Nanking (8): pl. 59, fig. 115 [as ‘Unio vestitus’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 804.
Simpson, 1914, Descr. Cat. Naiades: 941.

Quadrula kirtlandiana Simpson, 1900
‘Conrad’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 791. [in part]
‘Conrad’ Simpson, 1914, Descr. Cat. Naiades: 891. [in part]
(misidentified reference to Unio kirtlandianus Lea, 1834)

Quadrula pyramidata Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 789. [in part]
Chadwick, 1906, unknown publication: 97.
‘Lea’ Simpson, 1914, Descr. Cat. Naiades: 889. [in part]
(reference to Unio pyramidatus Lea, 1831)

Nodularia (sec. Cafferia) jickeli Simpson, 1900
‘Phil.’ Jickeli, 1874, Nova Acta Dtsch. Akad. Naturf. 37(1): 276, pl. 11, figs. 3-3b [as ‘U. teretiusculus’]. [in part]
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 826.
Simpson, 1914, Descr. Cat. Naiades: 579 [as ‘Unio jickeli’].

Parreysia dumesleanus Simpson, 1900
‘Charmes’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 847.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 85.
Simpson, 1914, Descr. Cat. Naiades: 1130.
(error for Unio dumesnilianus Charmes, 1885)

Chambardia letourneuxiana Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 902.
‘Bourguignat’ Simpson, 1914, Descr. Cat. Naiades: 1350.
(error for Chambardia letourneuxi Servain, 1890)

Anodonta tawi Simpson, 1900
‘Rang’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 902.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
(error for Anodonta tawaii Rang, 1835)

Diplodon (Hyridella s.s.) menziezi Simpson, 1900
‘Gray’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 889.
‘Gray’ Simpson, 1914, Descr. Cat. Naiades: 1290.
(error for Unio menziesii Gray, 1843)

Diplodon (s.s.) aethiops var. piricicabana Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 877.
(error for Unio aethiops var. piracicabana Ihering, 1893)
Type(s): NOMEN NUDUM SMF_4031, Piracicaba, Geb. d Rio Tiete, St. Sao Paulo, Bras.

Cristaria (Crassitesta) radiata Simpson, 1900
Heude, 1881, Conch. Fluv. Nanking (7): pl. 52, fig. 96 [as ‘Dipsas parvus’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 586.
Simpson, 1914, Descr. Cat. Naiades: 236.

Pleurobema avellana Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 81, pl. 2, figs. 6-7.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 758.
Simpson, 1914, Descr. Cat. Naiades: 778.
Type(s): HOLOTYPE UMMZ_79653, Cahaba River, Alabama.

Nodularia (s.s.) fischeriania Simpson, 1900
‘Morlet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 818.
‘Morlet’ Simpson, 1914, Descr. Cat. Naiades: 1009.
(error for Unio fischerianus Morlet, 1883)

Pleurobema patsaligensis Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 82, pl. 2, fig. 1.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 761.
Simpson, 1914, Descr. Cat. Naiades: 788.
Type(s): HOLOTYPE USNM_150475, Little Patsaliga Creek, Alabama.

Unio platiolus Simpson, 1900
‘Rafinesque’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
‘Rafinesque’ Simpson, 1914, Descr. Cat. Naiades: 731.
(error for Obliquaria plateolus Rafinesque, 1831)

Anodonta jewittiana Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927, Check List N. Amer. Naiades: 97.
(error for Anodonta jewettiana Lea, 1868)

Anodonta jewittii Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927, Check List N. Amer. Naiades: 97.
‘Lea’ Haas, 1931, Senckenbergiana 13: 99.
(error for Anodonta jewettii Lea, 1868)

Unio cistelliformis Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 716.
Simpson, 1914, Descr. Cat. Naiades: 641.
Frierson, 1927, Check List N. Amer. Naiades: 29.
Haas, 1969, Das Tierreich 88: 228.
R.I. Johnson, 1970, Bull. MCZ 140(6): 317.
Davis et al., 1981, Biol. J. Linn. Soc. 15: 135.
Davis, 1984, Malacologia 25(2): 631.
Williams et al., 1993, Fisheries 18(9): 11.
Haag, 2012, N. Amer. Freshw. Mussels: 73.
(error for Unio cistellaeformis Lea, 1863)

Diplodon greefianus Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 875.
(error for Unio greeffeanus Ihering, 1893)

Glabaris (s.s.) philippianus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 919.
Simpson, 1914, Descr. Cat. Naiades: 1416.
(new name for Anodonta subsinuata Philippi, 1869)

Mutela lavigerina Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 906.
‘Bourguignat’ Simpson, 1914, Descr. Cat. Naiades: 1367.
(error for Mutela lavigeriana Bourguignat, 1886)

Spatha pangallicensis Simpson, 1900
‘Rochebrune’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 902.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
Simpson, 1914, Descr. Cat. Naiades: 1350.
(error for Spatha pangallensis Rochebrune, 1882)

Monocondylaea tamsana Simpson, 1900
‘Dunker’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 913.
‘Dunker’ Simpson, 1914, Descr. Cat. Naiades: 1392.
(error for Monocondylaea tamsiana Dunker, 1858)

Lampsilis tampecoensis Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 570.
(error for Unio tampicoensis Lea, 1838)

Nephronaias calimatarum Simpson, 1900
‘Morelet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 596.
(error for Unio calamitarum Morelet, 1849)

Unio zonata Simpson, 1900
‘Rafinesque’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
Simpson, 1914, Descr. Cat. Naiades: 731.
Frierson, 1927, Check List N. Amer. Naiades: 90.
(error for Unio (Aximedia) zonalis Rafinesque, 1820)

Unio sacellus Simpson, 1900
‘Drouet & Chaper’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 818.
Simpson, 1914, Descr. Cat. Naiades: 1011.
Haas, 1924, Abh. Senckenb. Naturf. Ges. 38: 198.
(error for Unio saccellus Drouët & Chaper, 1892)

Unio aequitoria Simpson, 1900
‘Morelet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 823 [as ‘æquitoria’].
(error for Unio aequatorius Morelet, 1885)

Nodularia radiota Simpson, 1900
‘Charmes’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 824.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 84.
(error for Unio ratidotus Charmes, 1885)

Unio lourdelli Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 826.
(error for Unio lourdeli Bourguignat, 1887)

Parreysia gowhattenensis Simpson, 1900
‘Theobald’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 845.
(error for Unio gowhattensis Theobald, 1873)

Unio hagnei Simpson, 1900
‘Strubell’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862.
(error for Unio hageni Strubell, 1897)

Unio ilqui Simpson, 1900
‘Soleilet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862.
‘Soleillet’ Simpson, 1914, Descr. Cat. Naiades: 1193.
(error for Unio ilqi Bourguignat, 1885)

Anodon chiquetana Simpson, 1900
‘d’Orbigny’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 928.
‘d’Orbigny’ Simpson, 1914, Descr. Cat. Naiades: 1441.
(error for Unio (Anodontes) chiquitana d’Orbigny, 1835)

Unio menziezianus Simpson, 1900
‘Reeve’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 889.
(error for Unio menziesianus Reeve, 1865)

Anodontes sirionis Simpson, 1900
‘d’Orbigny’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 918.
‘d’Orbigny’ Simpson, 1914, Descr. Cat. Naiades: 1407.
(error for Unio (Anodontes) sirionos d’Orbigny, 1835)

Glabaris trapesialis var. cygnaeformis Simpson, 1900
‘Pilsbry’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 925.
‘Pilsbry’ Simpson, 1914, Descr. Cat. Naiades: 1432.
(error for Glabaris trapesialis var. cygneiformis Pilsbry, 1896)

Pseudodon loomisi Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 84, pl. 4, fig. 7.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 840.
Simpson, 1914, Descr. Cat. Naiades: 1101.

Monocondylaea rhombica Simpson, 1900
‘Küster’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 836.
Preston, 1912, Rec. Ind. Mus. 7: 295.
(error for Monocondylaea rhomboidea Küster, 1862)

Quadrula (sec. Fusconaia) coccinea var. paupercula Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 789.
(intro'd as intra-sp. of Unio coccineus Conrad, 1836; homonym of Unio pauperculus Lea, 1861; renamed Quadrula (sec. Fusconaia) coccinea var. magnalacustris Simpson, 1914)

Unio phayresi Simpson, 1900
‘Theobald’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 842.
Simpson, 1914, Descr. Cat. Naiades: 1107.
Preston, 1915, Fauna Brit. India: 155.
(intro'd as syn of Mya corrugata Müller, 1774)

Unio pequottianus Simpson, 1900
‘Linsley’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
‘Linsley’ Simpson, 1914, Descr. Cat. Naiades: 731.
(error for Unio pequottinus Linsley, 1845)

Truncilla (Scalenaria) sulcata var. delicata Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 520, footnote.
Simpson, 1914, Descr. Cat. Naiades: 16.
(intro'd as intra-sp. of Unio sulcatus Lea, 1829)
Type(s): SYNTYPE USNM_160853, Amherstburg, Michigan.

Pleurobema fassinans var. rhomboidea Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 762.
Simpson, 1914, Descr. Cat. Naiades: 798.
(intro'd as intra-sp. of Unio fassinans Lea, 1868)
Type(s): LECTOTYPE USNM_133331, Clinch R., Va.

Nodularia sobolus Simpson, 1900
‘Fischer’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 819.
(error for Unio soboles Fischer, 1891)

Anodonta inaequivalvis Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 922.
Martens, 1900, Biol. Centr.-Amer., Moll.: 534.
Simpson, 1914, Descr. Cat. Naiades: 1423.
Mansur et al., 2020, [in] Damborenea, Rogers & Thorp, Freshw.Invert. Neotrop. 5: 424.
(error for Anodonta inaequivalva Lea, 1868)

Glabaris (s.s.) umbonatus Simpson, 1900
‘Gould’ Sowerby, 1870, Conch. Icon. 17: pl. 29, sp. 115, fig. 115b [as ‘Anodon ciconia’]. [in part]
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 926, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1436.

Unio koseretzi Simpson, 1900
‘Clessin’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894.
Simpson, 1914, Descr. Cat. Naiades: 1312.
Haas, 1930, Senckenbergiana 12: 182.
Bonetto, 1964, Physis 24(68): 327.
Parodiz, 1968, Sterkiana 30: 7.
Bonetto & Mansur, 1970, Acta Zool. Lilloana 27: 245.
(error for Unio koseritzi Clessin, 1888)

Ptychobranchus clintonensis Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 79, pl. 5, fig. 3.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 613.
Simpson, 1914, Descr. Cat. Naiades: 335.
Type(s): HOLOTYPE USNM_124615, Little Red R., near Clinton, Ark.

Ptychorhynchus incertus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 851.
(new name for Unio compressus Heude, 1877)

Ptychorhynchus pfisteri var. inspiratus Simpson, 1900
‘Heude’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 851.
‘Heude’ Simpson, 1914, Descr. Cat. Naiades: 1145.
(error for Unio pfisteri var. insperatus Heude, 1877)

Hyriopsis velthuzeni Simpson, 1900
‘Schepman’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 581.
(error for Unio velthuizeni Schepman, 1896)

Glabaris (sec. Virgula) falsus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 932, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1456.
Type(s): HOLOTYPE (MONOTYPY) USNM_86711, Yuruari River.

Parreysia simpularis Simpson, 1900
‘Heude’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 845.
Simpson, 1914, Descr. Cat. Naiades: 1122.
Haas, 1924, Abh. Senckenb. Naturf. Ges. 38: 159.
Haas, 1969, Das Tierreich 88: 106.
He & Zhuang, 2013, Freshwater Bivalves China: 95.
(error for Unio simpularius Heude, 1884)

Unio lortiti Simpson, 1900
‘Kobelt’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 690.
(error for Unio lorteti Kobelt, 1895)

Lampsilis (Carunculina) texasensis var. compressus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 564.
Simpson, 1914, Descr. Cat. Naiades: 150.
(intro'd as intra-sp. of Unio texasiensis Lea, 1857)

Lampsilis mearnsi Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 75, pl. 1, fig. 4.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 564.
Simpson, 1914, Descr. Cat. Naiades: 150.
Type(s): LECTOTYPE USNM_151549, Elm Cr., 27 mi from Ft. Clark, Texas.

Unio barrandii Simpson, 1900
‘Dupuy’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 692.
‘Dupuy’ Simpson, 1914, Descr. Cat. Naiades: 555.
(error for Unio barraudii Bonhomme, 1840)

Unio taniatus Simpson, 1900
‘Paetel’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 541.
‘Paetel’ Simpson, 1914, Descr. Cat. Naiades: 83.
(error for Unio taeniatus Conrad, 1834)

Lamellidens canefrianus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 857, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1176.
(new name for Unio protensus Tapparone Canefri, 1889)

Lamellidens marginalis var. hanleyi Simpson, 1900
Hanley & Theobald, 1872, Conch. Indica (3): 20, pl. 44, fig. 4 [as ‘Unio marginalis var. corriana’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 855.
Simpson, 1914, Descr. Cat. Naiades: 1169.
(intro'd as intra-sp. of Unio marginalis Lamarck, 1819)

Unio billotianus Simpson, 1900
‘Charmes’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 847.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 84.
Simpson, 1914, Descr. Cat. Naiades: 1130.
Haas, 1936, Abh. Senckenb. Naturf. Ges. 431: 52.
Haas, 1969, Das Tierreich 88: 190.
Daget, 1998, Cat. Bivalves Africains: 65.
(error for Unio billottianus Charmes, 1885)

Nodularia (sec. Radiatula) lima Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 820.
Simpson, 1914, Descr. Cat. Naiades: 1018.
(new name for Unio radula Hanley, 1856)

Nephronaias reticulatus Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 77, pl. 2, fig. 3.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 595.
Simpson, 1914, Descr. Cat. Naiades: 268.
Type(s): HOLOTYPE USNM_152964, Patook [=Patuca] River, Capunta, Honduras.

Unio microstictis Simpson, 1900
‘Heude’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 799.
(error for Unio microstictus Heude, 1877)

Mutelina thottoni Simpson, 1900
‘Rochebrune’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 906.
(error for Mutelina tholloni Rochebrune, 1886)

Unio houngdaranicus Simpson, 1900
‘Tapparone Canefri’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 844.
Preston, 1912, Rec. Ind. Mus. 7: 301.
Simpson, 1914, Descr. Cat. Naiades: 1116.
Preston, 1915, Fauna Brit. India: 167.
Prashad, 1922, Rec. Ind. Mus. 24: 101.
Subba Rao, 1989, Freshw. Moll. India: 183.
Graf & Cummings, 2007, J. Moll. Studies 73: 311.
Bogan, 2010, FADA: [25].
(error for Unio houngdarauicus Tapparone Canefri, 1889)

Unio faidherbi Simpson, 1900
‘Jousseaume’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 822.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 84.
Simpson, 1914, Descr. Cat. Naiades: 1027.
(error for Reneus faidherbei Jousseaume, 1886)

Dromus dromus Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 615.
Haas, 1930, Senckenbergiana 12(6): 317.
Haas, 1969, Treatise on Invert. Paleo: N452.
Stansbery, 1970, Malacologia 10(1): 18.
Millard, 2001, Class. Moll. (3): 1066.
Serb, 2006, J. Moll. Studies 72: 427.
(error for Unio dromas Lea, 1834)

Unio nasutilus Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 735.
Simpson, 1914, Descr. Cat. Naiades: 691.
R.I. Johnson, 1970, Bull. MCZ 140(6): 334.
Burch, 1975, Freshw. Unio. North Amer.: 167.
Bogan, 2002, Workbook Key Freshw. Biv. NC: Table 5.
Perkins et al., 2017, Conserv. Genet. 18: 752.
Inoue et al., 2018, Invert. Syst. 32: Table S2.
(error for Unio nasutidus Lea, 1863)

Cyprogenia irrorata var. pusilla Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 610.
Simpson, 1914, Descr. Cat. Naiades: 328.
(intro'd as intra-sp. of Unio irroratus Lea, 1828)
Type(s): LECTOTYPE USNM_152004, Mammoth Cave (Green R.), Kentucky.

Leguminaia (sec. Leguminaia) locardi Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 653.
Simpson, 1914, Descr. Cat. Naiades: 449.
(new name for Pseudodon chantrei Locard, 1883)

Anodontites europae Simpson, 1900
‘Leach’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 624 [as ‘europæ’].
‘Leach’ Simpson, 1914, Descr. Cat. Naiades: 364 [as ‘europæ’].
(error for Anodontes europaea Leach, 1852)

Unio tahetianus Simpson, 1900
‘Catlow & Reeve’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 744.
‘Catlow & Reeve’ Simpson, 1914, Descr. Cat. Naiades: 731.
(error for Unio tahitianus Catlow & Reeve, 1845)

Quadrula (Lamprotula) kouangensis Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 799, footnote.
Simpson, 1914, Descr. Cat. Naiades: 923 [as ‘konangensis’].
(new name for Unio moreletianus Heude, 1883)

Margaritana etowahensis Simpson, 1900
‘Conrad’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 672.
Simpson, 1914, Descr. Cat. Naiades: 510.
Frierson, 1927, Check List N. Amer. Naiades: 19.
(error for Margaritana etowaensis Conrad, 1849)

Quadrula (Lamprotula) similaris Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 799.
Simpson, 1914, Descr. Cat. Naiades: 924.
(new name for Unio affinis Heude, 1875)

Unio granadensis Simpson, 1900
‘Conrad’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 598.
Simpson, 1914, Descr. Cat. Naiades: 289 [corrected in corrigenda].
Morrison, 1943, Nautilus 57: 15.
(error for Unio grandensis Conrad, 1855)

Unio guahybae Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894. [nomen nudum]
‘von Ihering’ Simpson, 1914, Descr. Cat. Naiades: 1312. [nomen nudum]
Type(s): NOMEN NUDUM SMF_168335, Guahyba, Rio Grande do Sul, Brasil.

Unio aethiopiformis Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894. [nomen nudum]
‘von Ihering’ Simpson, 1914, Descr. Cat. Naiades: 1312. [nomen nudum]
Type(s): NOMEN NUDUM MCZ_192369, Rio Camaquam, Rio Grande do Sul, Brazil.

Unio bishoffi Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894. [nomen nudum]

Unio sebastanae Simpson, 1900
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894. [nomen nudum]
‘von Ihering’ Simpson, 1914, Descr. Cat. Naiades: 1312. [nomen nudum]

Anodonta tabascoensis Simpson, 1900
‘Morelet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 646.
(error for Anodonta tabascensis Morelet, 1884)

Unio bythinicus Simpson, 1900
‘Kobelt’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 695.
Simpson, 1914, Descr. Cat. Naiades: 565.
Haas, 1940, Zool. Ser. Field Mus. Nat. Hist. 24: 141.
(error for Unio bithynicus Kobelt, 1893)

Burtonia leopoldvillensis Simpson, 1900
‘Putzeys’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 577.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
(error for Burtonia carrei Putzeys, 1898)

Hyriopsis bialatus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 579.
(new name for Unio delphinus Gruner, 1841; renamed Unio delphinopterus Dautzenberg & Fischer, 1905)

Diplodon frenzellii Simpson, 1900
‘Ihering’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 882.
Simpson, 1914, Descr. Cat. Naiades: 1264.
(error for Unio frenzelii Ihering, 1893)

Trapezoideus peninsularis Simpson, 1900
‘Lea’ Reeve, 1865, Conch. Icon. 16: pl. 28, sp. 142 [as ‘Unio sumatrensis’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 859, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1186.
Type(s): TYPE BMNH_1964159, Sumatra.

Anodonta carthagena Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 922.
Simpson, 1914, Descr. Cat. Naiades: 1427.
(intro'd as syn of Anodonta trautwiniana Lea, 1852)

Unio idgi Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862.
‘Bourguignat’ Simpson, 1914, Descr. Cat. Naiades: 1193.
(error for Unio ilqi Bourguignat, 1885)

Unio daniellii Simpson, 1900
‘Villa’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 891.
Simpson, 1914, Descr. Cat. Naiades: 1298.
(error for Unio danellii Villa, 1871)

Anodonta atrovireus Simpson, 1900
‘Philippi’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 933.
(error for Anodonta atrovirens Philippi, 1849)

Lampsilis australis Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 75, pl. 2, fig. 2.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 544.
Simpson, 1914, Descr. Cat. Naiades: 94.
Type(s): HOLOTYPE USNM_150473, Little Patsaliga Creek, Alabama.

Parreysia hypsiprimnus Simpson, 1900
‘von Martens’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 849.
Simpson, 1914, Descr. Cat. Naiades: 1136.
Haas, 1936, Abh. Senckenb. Naturf. Ges. 431: 68.
Woodward in Crowley et al., 1964, Annals Mus. R. Afr. Cent. 131: 47.
(error for Unio hypsiprymnus Martens, 1897)

Nodularia cylindrica Simpson, 1900
Schrenck, 1867, Reise Forsch. Amurlande 2: 694, pl. 27, figs. 1-3 [as ‘Unio grayanus Lea’].
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 84 [as ‘cylindracea’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 807.
Simpson, 1914, Descr. Cat. Naiades: 958.
(correct name for Nodularia cylindracea Simpson, 1900)

Anodonta rotundata Simpson, 1900
‘Trask’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 629.
(error for Anodonta rotundovata Trask, 1854)

Diplodon (Dipldon) cuprinus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 883.
(new name for Unio fragilis Reeve, 1865)

Diplodon (s.s.) aureus Simpson, 1900
‘Swainson’ Küster, 1861, Conchyl. Cab. 9(2): 161, pl. 46, fig. 3 [as ‘Unio auratus’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 883.
Simpson, 1914, Descr. Cat. Naiades: 1268.

Anodon chiniana Simpson, 1900
‘Heude’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 639.
Preston, 1912, Rec. Ind. Mus. 7: 284.
(error for Anodon cheniana Heude, 1880)

Anodon obtusata Simpson, 1900
‘Heude’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 639.
Preston, 1912, Rec. Ind. Mus. 7: 284.
(error for Anodon obturata Heude, 1881)

Spatha wissmani Simpson, 1900
‘von Martens’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 896.
‘von Martens’ Simpson, 1914, Descr. Cat. Naiades: 1315.
(error for Spatha wissmanni Martens, 1883)

Lampsilis brittsi Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 76, pl. 5, figs. 1-2.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 533.
Simpson, 1914, Descr. Cat. Naiades: 58.
Type(s): HOLOTYPE USNM_152700, Little Niangua Riv., Camden Co., Mo.

Pilsbryoconcha lemsleyi Simpson, 1900
‘Morelet’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 588.
Suvatti, 1950, Fauna Thailand: 109.
(error for Anodonta lemeslei Morelet, 1875)

Pleurobema brevis var. subilliptica Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 763.
(error for Pleurobema brevis subelliptica Simpson, 1900)

Burtonia livingstonensis Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 578.
‘Bourguignat’ Simpson, 1914, Descr. Cat. Naiades: 205.
(error for Burtonia livingstoniana Bourguignat, 1883)

Unio castus Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 708.
(reference to Unio castus Lea, 1860)

Lampsilis (Proptera) explicatus Simpson, 1900
‘Morelet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 571. [in part]
(reference to Unio explicatus Morelet, 1849)

Lampsilis (Proptera) explicatus Simpson, 1900
‘Morelet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 571, footnote 4. [in part]
(misidentified reference to Unio explicatus Morelet, 1849)

Burtonia lavigerina Simpson, 1900
‘Bourguignat’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 577.
Simpson, 1914, Descr. Cat. Naiades: 204.
Pain & Woodward, 1968, Rev. Zool. Botan. Afr. 77: 213.
(error for Burtonia lavigeriana Bourguignat, 1886)

Unio dorbignyanus Simpson, 1900
‘Sowerby’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 866 [as ‘d’orbignyanus’].
‘Sowerby’ Simpson, 1914, Descr. Cat. Naiades: 1208 [as ‘d’orbignyanus’].
(error for Unio dorbignianus Sowerby, 1868)

Spatha (s.s.) lacustris Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 898.
Simpson, 1914, Descr. Cat. Naiades: 1330.
(new name for Spatha anceyi Ancey, 1894)
Type(s): HOLOTYPE MRAC_57521, N. Nyassa, Karonga.

Anodon javana Simpson, 1900
‘Sowerby’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 588.
Preston, 1912, Rec. Ind. Mus. 7: 282.
Simpson, 1914, Descr. Cat. Naiades: 242.
Haas, 1920, Conch. Cab. 9 (pt. 2, h. 52): 297.
Haas, 1969, Das Tierreich 88: 382.
(error for Anodon javona Sowerby, 1867)

Quadrula flexuosa Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 83, pl. 2, fig. 8.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 790.
Simpson, 1914, Descr. Cat. Naiades: 887.

Margaritana hembeli Simpson, 1900
‘Conrad’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 679.
Ortmann, 1912, Ann. Carnegie Mus. 8: 235, fig. 3.
Simpson, 1914, Descr. Cat. Naiades: 523. [in part]
Clench & Turner, 1956, Bull. Fla. State Mus. 1: 148, pl. 5, fig. 1.
(misidentified reference to Unio hembeli Conrad, 1838)

Spatha protchi Simpson, 1900
‘Rochebrune’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 902.
(error for Spathella protchei Rochebrune, 1886)

Pleurobema argentea pannosa Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 82.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 763.
Simpson, 1914, Descr. Cat. Naiades: 799.
(intro'd as intra-sp. of Unio argenteus Lea, 1841)

Pleurobema brevis subelliptica Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 80.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 763 [as ‘subilliptica’].
Simpson, 1914, Descr. Cat. Naiades: 801.
(intro'd as intra-sp. of Unio brevis Lea, 1872)
Type(s): LECTOTYPE USNM_159952, Hardy, Ark.

Quadrula (sec. Rotundaria) granifera var. pusilla Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 795.
Simpson, 1914, Descr. Cat. Naiades: 906.
(intro'd as intra-sp. of Unio graniferus Lea, 1838)
Type(s): LECTOTYPE MCZ_20176, Green River, Kentucky.

Quadrula guatemalensis Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 83, pl. 2, fig. 4.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 796.
Simpson, 1914, Descr. Cat. Naiades: 909.
Type(s): HOLOTYPE (MONOTYPY) USNM_128991, Usumacinta River, Guatemala.

Unio valentinus Simpson, 1900
‘Sowerby’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 692.
‘Sowerby’ Simpson, 1914, Descr. Cat. Naiades: 555.
(error for Unio valentianus Sowerby, 1866)

Unio averillii Simpson, 1900
“Wright” of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 560.
Simpson, 1914, Descr. Cat. Naiades: 138.
Frierson, 1927, Check List N. Amer. Naiades: 76.
R.I. Johnson, 1970, Bull. MCZ 140(6): 373.
R.I. Johnson, 1972, Bull. Fla. State Mus. 16(4): 237.
Burch, 1975, Freshw. Unio. North Amer.: 159.
(error for Unio averellii B.H. Wright, 1888)

Unio bleaverensis Simpson, 1900
‘Pætel’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 724.
(error for Unio blauverenses Paetel, 1890)

Unio longitudinatus Simpson, 1900
‘Anton’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 862.
‘Anton’ Simpson, 1914, Descr. Cat. Naiades: 1193.
(error for Unio (s.s.) longedentatus Anton, 1839)

Spatha (Moncetia) lavigerina Simpson, 1900
‘Bourguignat’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 901.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
Simpson, 1914, Descr. Cat. Naiades: 1346.
(error for Moncetia lavigeriana Bourguignat, 1886)

Anodonta wahlametensis Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 629.
Arnold, 1908, Proc. U.S. Nat. Mus. 34: 355.
Simpson, 1914, Descr. Cat. Naiades: 379.
Henderson, 1935, GSA, Spec. Pap. 3: 66.
Davis & Fuller, 1981, Malacologia 20: 219.
Mock et al., 2004, Molec. Ecol. 13: 1090.
(error for Anodonta wahlamatensis Lea, 1838)

Spatha (Moncetia) rochebruneana Simpson, 1900
‘Bourguignat’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 901.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 87.
Simpson, 1914, Descr. Cat. Naiades: 1346.
(error for Moncetia rochebruniana Bourguignat, 1886)

Diplodon (s.s.) leai Simpson, 1900
‘Fer.’ Lea, 1836, Synopsis Fam. Naiades: 32 [as ‘Margarita (Unio) modestus’]. [nomen nudum]
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 876, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1241.
Type(s): SYNTYPE USNM_85725, Brazil.

Lampsilis (s.s.) binominatus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 528.
Simpson, 1914, Descr. Cat. Naiades: 42.
(new name for Unio lineatus Lea, 1840)

Diplodon (s.s.) wagnerianum Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 877.
Simpson, 1914, Descr. Cat. Naiades: 1246 [as ‘wagnerianus’].
(new name for Diplodon ellipticum Wagner, 1827)

Unio oblatus Simpson, 1900
Lea, 1863, Proc. Acad. Nat. Sci. 15: 193 [as ‘ablatus’].
Lea, 1866, Jour. Acad. Nat. Sci. 6 [O. 11]: 13 [17], pl. 4, fig. 10.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 730.
(new name for Unio ablatus Lea, 1863)
Type(s): HOLOTYPE USNM_86001, Gaston Co., N.C.

Lampsilis (sec. Eurynia) ligamentina var. gibbus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 540.
Simpson, 1914, Descr. Cat. Naiades: 82.
(intro'd as intra-sp. of Unio ligamentina Lamarck, 1819)
Type(s): SYNTYPE USNM_160597, Black Rock, Arkansas.

Anodonta shefferiana Simpson, 1900
‘Clessin’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 617.
(error for Anodonta shaefferiana Lea, 1852)

Lampsilis (Proptera) lividus Simpson, 1900
‘Morelet’ Reeve, 1865, Conch. Icon. 16: pl. 22, sp. 101 [as ‘Unio testudineus’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 571.
Simpson, 1914, Descr. Cat. Naiades: 174.

Spatha (Moncetia) monieti Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 901.
(error for Moncetia moineti Bourguignat, 1886)

Unio (sec. Lymnium) pseudonymus Simpson, 1900
‘Bourg.’ Kobelt, 1886, Icon. Land- und Süssw.-Moll. 2: 22, pl. 41, fig. 255 [as ‘U. hueti’].
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 694.
Simpson, 1914, Descr. Cat. Naiades: 560.

Anodonta schlaflii Simpson, 1900
‘Mousson’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 648.
(error for Anodonta schlaeflii Mousson, 1874)

Unio buckleyi Simpson, 1900
‘Lea’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 713.
(misidentified reference to Unio buckleyi Lea, 1843)

Unio bandanii Simpson, 1900
‘Küster’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 686.
(error for Unio bandinii Rossmässler, 1837)

Cameronia lavigirina Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 910.
(error for Cameronia lavigeriana Bourguignat, 1886)

Cameronia vynckii Simpson, 1900
‘Bourguignat’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 910.
Kobelt, 1910, Abh. Senckenb. Naturf. Ges. 32: 86.
(error for Cameronia vynckei Bourguignat, 1886)

Cameronia randebeli Simpson, 1900
‘Bourguignat’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 910.
(error for Cameronia randabeli Bourguignat, 1886)

Unio sapperi Ihering, 1901
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 571, footnote 4 [as ‘Unio explicatus’].
Ihering, 1901, Nautilus 15(5): 50.
Type(s): TYPE SMF_3477, Río Chixoy, Nebemfld. Río Usumacinta, Guatemala.

Unio bischoffi Simpson, 1914
‘von Ihering’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894 [as ‘bishoffi’]. [nomen nudum]
‘von Ihering’ Simpson, 1914, Descr. Cat. Naiades: 1312. [nomen nudum]

Diplodon (s.s.) suppositus Simpson, 1914
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 877. [nomen nudum]
Simpson, 1914, Descr. Cat. Naiades: 1245.
Type(s): SYNTYPE USNM_162374, Parana, Brazil.

Diplodon (s.s.) iheringi Simpson, 1914
‘Clessin’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 894. [nomen nudum]
‘Clessin’ Simpson, 1914, Descr. Cat. Naiades: 1272.
Type(s): SYNTYPES SMF_11312, Rio Guahyba, Rio Gr. do Sul, Bras.

Alasmidonta (Bullella) arcula (Lea, 1838)

Alasmidonta (Bullella) triangulata (Lea, 1858)

Alasmidonta (Pressodonta) calceola (Lea, 1830)
+ Alasmodonta truncata Conrad, 1834
+ Margaritana deltoidea Lea, 1838

Alasmidonta (Pressodonta) collina (Conrad, 1837)

Alasmidonta (Pressodonta) diversa (Conrad, 1856)

Alasmidonta (Pressodonta) etowahensis [sic] Conrad, 1849

Alasmidonta (Pressodonta) georgiana (Lea, 1859)
+ Margaritana etowahensis Lea, 1858
+ Alasmodonta impressa J.G. Anthony, 1865

Alasmidonta (Pressodonta) heterodon (Lea, 1829)

Alasmidonta (Pressodonta) holstonia (Lea, 1838)
+ Unio holstonianus Hanley, 1843
+ Margaritana holstoniana Küster, 1862
+ Unio holstonianus Sowerby, 1868
+ Unio striatus Sowerby, 1868

Alasmidonta (Pressodonta) minor (Lea, 1845)

Alasmidonta (Rugifera) marginata Say, 1819
+ Unio varicosa Lamarck, 1819
+ Unio cariosa Lamarck, 1819
+ Unio rugulosus Wood, 1828
+ Alasmidonta marginata Say, 1834
+ Alasmodon corrugata De Kay, 1843
+ Alasmodon marginata De Kay, 1843

Alasmidonta (Rugifera) raveneliana (Lea, 1834)
+ Unio swananoensis Hanley, 1843

Alasmidonta (Rugifera) truncata (Wright, B.H., 1898)
+ Alasmodonta truncata Lea, 1836
+ Margaritana marginata Küster, 1862

Alasmidonta (s.s.) undulata (Say, 1816)
+ Unio glabratus Sowerby & Sowerby, 1821
+ Unio hians Valenciennes, 1827
+ Alasmodonta sculptilis Say, 1829
+ Uniopsis radiata Swainson, 1840
+ Uniopsis mytiloides Swainson, 1840
+ Unio swainsoni Sowerby, 1868

Alasmidonta atropurpureum Rafinesque, 1831

Alasmidonta badium Rafinesque, 1831

Alasmidonta columbensis Lea, 1867

Alasmidonta hians Rafinesque, 1831

Alasmidonta papyraceum Rafinesque, 1831

Alasmidonta scriptum Rafinesque, 1831

Alasmidonta viridis Rafinesque, 1831

Anodonta anatinus (Sowerby, 1836)

Anodonta apollonica Bourguignat, 1880

Anodonta arcaeformis (Heude, 1877)

Anodonta aureus Paetel, 1890

Anodonta bealei Lea, 1863

Anodonta beringiana Middendorff, 1851
+ Anodonta youkanensis Lea, 1867
+ Anodonta youconensis Lea, 1867
+ Anodonta youcanensis Lea, 1867

Anodonta brandti Drouet, 1888

Anodonta californiensis Lea, 1852

Anodonta calipygos Kobelt, 1879

Anodonta callifera von Martens, 1860

Anodonta cataracta Say, 1816
+ Anodonta fluviatilis Bosc, 1801
+ Mytilus marginatus Eaton, 1826
+ Anodonta digonota Ferussac, 1835
+ Anodonta virgulata Lea, 1857
+ Anodonta williamsii Lea, 1862
+ Anodonta tryonii Lea, 1862

Anodonta chantrei Bourguignat, 1883

Anodonta chinensis Paetel, 1890

Anodonta cilicia [sic] Kobelt & Rolle, 1895

Anodonta coarctata Anton, 1839
+ Anodonta chapalensis Crosse & Fischer, 1893

Anodonta cochlearis (Sowerby, 1870)

Anodonta cornea Philippi, 1848

Anodonta corpulenta Cooper, 1834

Anodonta curvata Jay, 1839

Anodonta cygnea (Linnaeus, 1758)
+ Mytilus radiatus Müller, 1774
+ Mytilus zellensis Gmelin, 1791
+ Mytilus stagnalis Gmelin, 1791
+ Anodonta variabilis Draparnaud, 1801
+ Anodonta cygnaea Poiret, 1801
+ Mytilus avonensis Montagu, 1803
+ Mytilus avoensis Turton, 1807
+ Mytilus fucatus Dillwyn, 1817
+ Anodonta sulcata Lamarck, 1819
+ Anodonta intermedia Lamarck, 1819
+ Anodonta cellensis Pfeiffer, 1821
+ Mytilus incrassatus Sheppard, 1821
+ Mytilus macula Sheppard, 1821
+ Anodon paludosus Turton, 1822
+ Anodonta piscinalis Nilsson, 1822
+ Anodonta ventricosa C. Pfeiffer, 1825
+ Anodonta ventricosa C. Pfeiffer, 1825
+ Anodonta minima Millet, 1831
+ Anodonta oblonga Millet, 1831
+ Anodonta attenuata Held, 1836
+ Anodonta luxata Held, 1837
+ Anodonta exulcerata Porro, 1838
+ Anodonta callosa Küster, 1839
+ Anodonta tenella Küster, 1842
+ Anodonta cariosa Küster, 1842
+ Anodonta arealis Küster, 1842
+ Anodonta charpentierii Küster, 1842
+ Anodonta anserirostris Küster, 1842
+ Anodonta inornata Küster, 1842
+ Anodonta tumida Küster, 1842
+ Anodonta subluxata Küster, 1842
+ Anodonta sondermannii Küster, 1842
+ Anodonta opalina Küster, 1842
+ Anodonta nilssonii Küster, 1842
+ Anodonta rossmassleriana Dupuy, 1843
+ Anodonta coarctata Potiez & Michaud, 1844
+ Anodonta elongata Potiez & Michaud, 1844
+ Anodonta glabra Stabile, 1845
+ Anodonta lusitana Morelet, 1845
+ Anodonta regularis Morelet, 1845
+ Anodonta macilenta Morelet, 1845
+ Anodonta ranarum Morelet, 1845
+ Anodonta milletii Ray & Drouët, 1848
+ Anodonta gratelupeana Gassies, 1849
+ Anodonta dupuyii Ray & Drouët, 1849
+ Anodonta rayii Dupuy, 1849
+ Anodonta normandi Dupuy, 1849
+ Anodonta subponderosa Dupuy, 1849
+ Anodonta arelatensis Dupuy, 1850
+ Anodonta moulinsiana Dupuy, 1850
+ Anodonta scaldiana Dupuy, 1850
+ Anodonta idrina Spinelli, 1851
+ Anodontes europaea Leach, 1852
+ Anodonta parvula Drouët, 1852
+ Anodonta ventricosa Küster, 1853
+ Anodonta atrovirens Stabile, 1859
+ Anodonta helvetica Bourguignat, 1862
+ Anodonta psammita Bourguignat, 1862
+ Anodonta melinia Bourguignat, 1865
+ Anodonta elachista Bourguignat, 1865
+ Anodonta pictetiana Brot, 1867
+ Anodon simplicidus Sowerby, 1867

Anodonta cygnea var. anatina (Linnaeus, 1758)
+ Mytilus anatinus Maton & Rackett, 1807
+ Anodonta complanata Rossmässler, 1835
+ Anodonta anatina Clessin, 1876

Anodonta cygnea var. ponderosa Pfeiffer, C., 1825

Anodonta cygnea var. rostrata Rossmässler, 1836

Anodonta dalei Lesson, 1844

Anodonta danielsii Lea, 1858

Anodonta dariensis Lea, 1858

Anodonta dejecta Lewis, 1875
+ Anodonta mearnsiana Simpson, 1893

Anodonta dignota [sic] Rafinesque, 1831

Anodonta doliaris Lea, 1863
+ Anodonta dolearis Lea, 1863

Anodonta doliolum (Heude, 1878)

Anodonta euscaphys (Heude, 1879)

Anodonta exilior Lea, 1871
+ Anodonta chalcoensis Crosse & Fischer, 1893

Anodonta fenouilii (Heude, 1878)

Anodonta fluminea (Heude, 1877)
+ Anodon torrentis Heude, 1878

Anodonta fragilis Fitzinger, 1833

Anodonta gallandi Bourguignat, 1880

Anodonta gibbosa Say, 1824
+ Anodonta cowperiana Lea, 1840
+ Anodonta couperiana Lea, 1840
+ Anodonta cooperiana Paetel, 1890

Anodonta gibbosa var. dunlapiana Lea, 1842
+ Anodon dunlopiana Sowerby, 1869

Anodonta globosa Lea, 1841
+ Anodon nopalatensis Sowerby, 1867

Anodonta globosula (Heude, 1878)

Anodonta grandis Say, 1829
+ Anodonta ovata Lea, 1838
+ Anodonta salmonia Lea, 1838
+ Anodonta lewisii Lea, 1857
+ Anodonta salmonea Sowerby, 1867

Anodonta grandis var. benedictensis (Lea, 1834)
+ Anodonta cultrata Lea, 1852
+ Margaron (Anodonta) benedictii Lea, 1870

Anodonta grandis var. footiana Lea, 1840
+ Anodonta maryattana Lea, 1840
+ Anodonta maryattiana Lea, 1840
+ Anodonta sulcata Küster, 1842
+ Anodonta nilssonii Küster, 1842
+ Anodonta marryattana Conrad, 1853
+ Anodon imbricata J.G. Anthony, 1865
+ Anodon subinflata J.G. Anthony, 1865
+ Anodon edentulus Sowerby, 1867
+ Anodonta houghtonensis DeCamp, 1881

Anodonta grandis var. gigantea Lea, 1834 [sic]
+ Anodonta plana Lea, 1834
+ Anodonta declivis Conrad, 1834
+ Anodonta palna Lea, 1834
+ Anodonta decora Lea, 1838
+ Anodonta harpethensis Lea, 1840
+ Anodonta opalina Küster, 1842
+ Anodon subangulata J.G. Anthony, 1865
+ Anodon opalina J.G. Anthony, 1865
+ Anodon mcnielii J.G. Anthony, 1866
+ Anodon subgibbosa J.G. Anthony, 1866
+ Anodon inornata J.G. Anthony, 1866
+ Anodon ovata Sowerby, 1869
+ Margaron (Anodonta) subglobosa Lea, 1870

Anodonta grandis var. leonensis Lea, 1862

Anodonta hallenbeckii Lea, 1858
+ Anodonta gesnerii Lea, 1858
+ Anodonta gessneri Paetel, 1890

Anodonta harlandi Baird & Adams, 1867

Anodonta henryana Lea, 1857
+ Anodonta impura Say, 1829
+ Anodonta henryiana Lea, 1857

Anodonta hockingensis Call, 1880

Anodonta imbecillis Say, 1829
+ Anodonta incerta Lea, 1834
+ Anodon horda Gould, 1855
+ Anodonta hordeum Paetel, 1890

Anodonta implicata Say, 1829
+ Anodonta newtonensis Lea, 1838
+ Anodonta newtoniensis Lea, 1838
+ Anodonta excurvata De Kay, 1843
+ Anodonta housatonica Gould, 1848

Anodonta inflata Rafinesque, 1831

Anodonta japonica von Martens in Clessin, 1874
+ Anodonta cellensis Kobelt, 1879
+ Anodonta kobelti Ihering, 1893
+ Anodonta haconensis Ihering, 1893

Anodonta jourdyi Morlet, 1886

Anodonta kennerlyi Lea, 1860
+ Anodon kennerleyi Sowerby, 1870

Anodonta kennicottii Lea, 1861
+ Anodonta simpsoniana Lea, 1861
+ Anodonta dallasiana Lea, 1863

Anodonta laminata Rochebrune, 1881

Anodonta lauta von Martens, 1877
+ Anodonta woodiana Kobelt, 1879
+ Anodonta lauta var. rostrata Kobelt, 1879

Anodonta linneana [sic] Lea, 1852

Anodonta lucasi DeShayes, 1848
+ Anodon lucasii Morelet, 1851
+ Anodonta embia Bourguignat, 1864

Anodonta lucida (Heude, 1878)

Anodonta lugubris Say, 1829

Anodonta lurulenta Morelet, 1849

Anodonta marginata Say, 1816
+ Anodonta fragilis Lamarck, 1819
+ Anodonta lacustris Lea, 1857
+ Anodon flava J.G. Anthony, 1865
+ Anodon pallida J.G. Anthony, 1865
+ Anodon glandulosa J.G. Anthony, 1865
+ Anodon irisans J.G. Anthony, 1865
+ Anodon hordeum Sowerby, 1867
+ Anodonta subcarinata Currier, 1867
+ Anodon subcylindracea Sowerby, 1867
+ Anodon exilis Sowerby, 1870
+ Anodon pholadiformis Sowerby, 1870

Anodonta martensii Clessin, 1876

Anodonta micans (Anthony, J.G., 1865)

Anodonta numidica Bourguignat, 1864
+ Anodonta letourneuxi Bourguignat, 1864

Anodonta nuttalliana Lea, 1838
+ Anodonta triangularis Trask, 1854

Anodonta ohioensis [sic] Rafinesque, 1820

Anodonta opaca Lea, 1852

Anodonta oregonensis Lea, 1838
+ Anodon cognata Gould, 1850

Anodonta ovata Stark, 1822

Anodonta pepiniana Lea, 1838
+ Anodonta pepiniana Clessin, 1874

Anodonta pictus (Swainson, 1841)

Anodonta polymorpha ‘Küster’ Lea, 1870

Anodonta pseudodontopsis Bourguignat [sic]
+ Anodonta pseudodontopsis Crosse, 1883

Anodonta pumila (Heude, 1879)

Anodonta radiata Valenciennes, 1824

Anodonta recurvirostra ‘Kuster’ Lea, 1870

Anodonta retteri Drouet, 1899

Anodonta rivularis (Heude, 1877)

Anodonta schlaflii [sic] Mousson, 1874

Anodonta sedakowi Siemaschko, 1848

Anodonta somersi ‘Moore ms’ Call, 1880

Anodonta stewartiana Lea, 1834
+ Anodonta virens Lea, 1852

Anodonta subcircularis Clessin, 1873

Anodonta suborbiculata Say, 1831

Anodonta subsinuata Philippi, 1869

Anodonta sulcosa Adams & Adams, 1857

Anodonta tabascoensis [sic] Morelet, 1884

Anodonta teres Conrad, 1834

Anodonta texasensis Lea, 1859

Anodonta triangularis (Sowerby, 1870)

Anodonta trigona Held, 1836

Anodonta truncata ‘Kuster, 1866’ [sic]

Anodonta tunizana Morelet, 1864

Anodonta undulifera Clessin, 1876

Anodonta vescoiana Bourguignat, 1856

Anodonta viridis Adams & Adams, 1857

Anodonta wahlametensis [sic] Lea, 1838
+ Anodonta rotundovata Trask, 1854
+ Anodon rostratus Sowerby, 1867
+ Anodonta laosensis Fischer, 1891

Anodonta woodiana (Lea, 1834)
+ Symphynota magnifica Lea, 1834
+ Anodon rotundatus Swainson, 1841
+ Anodon gibbum Cantor, 1842
+ Anodonta aurata Küster, 1853
+ Anodonta magnifica Schrenck, 1867
+ Anodon tricostatus Sowerby, 1870
+ Anodonta edulis Heude, 1874
+ Anodon securiformis Heude, 1877
+ Anodon nigricans Heude, 1877
+ Anodon piscatorum Heude, 1878
+ Anodon elliptica Heude, 1878
+ Anodon fusca Heude, 1878
+ Anodon friniana Heude, 1878
+ Anodon joreti Heude, 1878
+ Anodon striata Heude, 1878
+ Anodon pacifica Heude, 1878
+ Anodon tumida Heude, 1879
+ Anodon subtetragona Heude, 1879
+ Anodon lineata Heude, 1879
+ Anodon irregularis Heude, 1879
+ Anodon melanochlorea Heude, 1879
+ Anodon agricolarum Heude, 1879
+ Anodon mingorum Heude, 1879
+ Anodon bigibba Heude, 1880
+ Anodon despecta Heude, 1880
+ Anodon obtusa Heude, 1880
+ Anodon navicella Heude, 1880
+ Anodon orbicularis Heude, 1880
+ Anodon limosa Heude, 1880
+ Anodon livida Heude, 1880
+ Anodon castanea Heude, 1880
+ Anodon minuta Heude, 1880
+ Anodon succinea Heude, 1880
+ Anodon cheniana Heude, 1880
+ Anodon scaphydium Heude, 1880
+ Anodon puerorum Heude, 1880
+ Anodon indecora Heude, 1880
+ Anodon sorini Heude, 1881
+ Anodon rosea Heude, 1881
+ Anodon aubryi Heude, 1881
+ Anodon confusa Heude, 1881
+ Anodon obturata Heude, 1881
+ Anodon rubella Heude, 1881
+ Anodon pulchella Heude, 1881
+ Anodon florida Heude, 1881
+ Anodonta retusa Heude, 1884
+ Anodon intemerata Heude, 1885
+ Anodon filippiana Heude, 1885
+ Anodon fantozatiana Heude, 1885
+ Anodonta scaphidium Paetel, 1890

Anodontoides ferussacianus (Lea, 1834)
+ Anodonta buchanensis Lea, 1838
+ Anodonta argentea Lea, 1840
+ Anodonta ferruginea Lea, 1840
+ Anodon plicatus Haldeman, 1842
+ Anodonta denigrata Lea, 1852
+ Anodonta oblita Lea, 1852
+ Anodon subcylindracea Sowerby, 1867

Anodontoides ferussacianus var. modestus (Lea, 1857)

Anodontoides ferussacianus var. subcylindraceus (Lea, 1838)

Arcidens confragosus (Say, 1829)

Arcidopsis footei (Theobald, 1876)

Arconaia conjungens (Heude, 1877)

Arconaia lanceolata (Lea, 1856)
+ Triquetra contorta Lea, 1857

Arconaia mutica (Heude, 1877)

Bariosta diploderma Rafinesque, 1831

Bariosta ponderosus Rafinesque, 1831

Bariosta vittatis Rafinesque, 1831

Brazzaea anceyi Bourguignat, 1885
+ Brazzaea eximia Bourguignat, 1886

Brazzaea bourguignati Bourguignat, 1886

Brazzaea bridouxi Bourguignat, 1886

Brazzaea charbonnieri Bourguignat, 1886

Brazzaea coulboisi Bourguignat, 1886

Brazzaea elongata Bourguignat, 1886

Brazzaea jourdyi [sic] Bourguignat, 1886

Brazzaea lavigerina [sic] Bourguignat, 1886

Brazzaea moineti Bourguignat, 1886

Brazzaea newcombiana Bourguignat, 1886

Brazzaea randabeli Bourguignat, 1886

Brazzaea ventrosa Bourguignat, 1886

Callonaia duprei (Récluz, 1843)
+ Castalia dolabella Sowerby, 1869

Castaliella sulcata (Krauss, 1849)
+ Unio kraussii Lea, 1853

Castalina martensi von Ihering, 1891

Castalina nehringi von Ihering, 1891

Castalina orbignyi (Húpe & Deville, 1850)
+ Unio orbignyana Hupé, 1857
+ Unio dorbignianus Sowerby, 1868

Castalina psammoica (d’Orbigny, 1835)

Castalina undosa (von Martens, 1885)

Chamberlainia duclerci (Rochebrune, 1882)

Chamberlainia hainesiana (Lea, 1856)
+ Unio imperialis Morelet, 1862

Chamberlainia paviei (Morelet, 1891)

Chelidonopsis arietina (Rochebrune, 1886)

Chelidonopsis hirundo (von Martens, 1881)

Colletopterum eximium (Bourguignat, 1870)

Colletopterum letourneuxi (Bourguignat, 1870)

Colletopterum præclarum (Bourguignat, 1870)

Colletopterum tanousi (Bourguignat, 1870)

Cristaria (Crassitesta) radiata Simpson, 1900
+ Dipsas parvulus Heude, 1881

Cristaria (Pletholophus) discoidea (Lea, 1834)
+ Unio tenuis Griffith & Pidgeon, 1833
+ Unio magnificus Griffith & Pidgeon, 1833
+ Anodonta chinensis Küster, 1853
+ Anodonta gruneriana Clessin, 1876

Cristaria (Pletholophus) gentiliana Heude, 1881

Cristaria (Pletholophus) parvula (Heude, 1878)

Cristaria (Pletholophus) reiniana von Martens, 1875

Cristaria (Pletholophus) swinhoei (Adams, H., 1866)
+ Unio swinhoei Sowerby, 1866

Cristaria (s.s.) bellua (Morelet, 1866)

Cristaria (s.s.) herculea (Middendorff, 1848)
+ Unio (Anodonta) smaragdina Anton, 1839
+ Dipsas plicata var. clessini Kobelt, 1879

Cristaria (s.s.) plicata (Leach, 1815)
+ Cristaria tuberculata Schumacher, 1817
+ Anodonta dipsas Blainville, 1825
+ Symphynota bialata Lea, 1829
+ Anodonta magnifica Clessin, 1873
+ Dipsas occidentalis Heude, 1885
+ Barbala plicatula Paetel, 1890

Cristaria (s.s.) spatiosa (Clessin, 1875)
+ Anodon herculeus Sowerby, 1867
+ Dipsas plicata var. japonica Kobelt, 1879

Ctenodesma borneensis (Issel, 1874)
+ Unio plicatulus Lea, 1859
+ Unio pensitatus Fischer & Crosse, 1894

Ctenodesma guppyi (Smith, E.A., 1885)

Cuneopsis capitatus (Heude, 1874)

Cuneopsis celtiformis (Heude, 1874)

Cuneopsis heudei (‘Bazin ms’ Heude, 1874)
+ Unio corderii Heude, 1875

Cuneopsis pisciculus (Heude, 1874)
+ Unio retortus Martens, 1875

Cuneopsis rufescens (Heude, 1874)

Cyprogenia aberti (Conrad, 1850)
+ Unio lamarckianus Lea, 1852
+ Unio popenoi Call, 1885

Cyprogenia irrorata (Lea, 1828)
+ Unio verrucosus albus Hildreth, 1828
+ Unio stegarius Say, 1834

Cyprogenia irrorata var. pusilla Simpson, 1900

Dalliella crassa (Drouet, 1892)

Dalliella crepera (Lea, 1850)
+ Anodon crepera Sowerby, 1867

Dalliella gracilis (Lea, 1850)

Dalliella insularis (Drouet, 1894)

Dalliella purpurea (Valenciennes, 1833)
+ Anodonta burroughiana Lea, 1834
+ Unio bengalensis Lea, 1838
+ Unio verecundus Gould, 1850
+ Anodonta chinensis Küster, 1853
+ Unio mauritianus Lea, 1859
+ Anodon bengalensis Sowerby, 1867
+ Anodonta heldii Clessin, 1873

Dalliella semmelinki von Martens, 1891

Dalliella serradelli (Drouet, 1892)

Dalliella subcrassa (Lea, 1850)

Dalliella tenuis (Lea, 1850)

Diplodon (Cyclomya s.s.) disculus (Lea, 1860)

Diplodon (Cyclomya s.s.) fontainianus (d’Orbigny, 1835)
+ Unio fontaineana d’Orbigny, 1846

Diplodon (Cyclomya s.s.) funebralis (Lea, 1860)

Diplodon (Cyclomya s.s.) gratus (Lea, 1860)

Diplodon (Cyclomya s.s.) paranensis (Lea, 1834)
+ Unio nocturnus Lea, 1860

Diplodon (Cyclomya s.s.) patelloides (Lea, 1860)

Diplodon (Cyclomya s.s.) peraeformis (Lea, 1860)

Diplodon (Cyclomya s.s.) rotundus (Wagner, 1827)
+ Unio rotundus Moricand, 1838

Diplodon (Cyclomya sec. Bulloideus) bulloides (Lea, 1859)

Diplodon (Cyclomya sec. Bulloideus) solisianus (d’Orbigny, 1835)

Diplodon (Cyclomya sec. Bulloideus) variabilis (Maton, 1811)
+ Unio matoniana d’Orbigny, 1835
+ Unio membranacea Hanley, 1843

Diplodon (Hyridella s.s.) australis (Lamarck, 1819) Hanley, 1842
+ Unio depressa Lesson, 1830
+ Unio ambiguus Philippi, 1847
+ Unio australis Philippi, 1848
+ Unio balonnensis Conrad, 1850
+ Unio shuttleworthi Küster, 1856
+ Unio philippianus Küster, 1861
+ Unio danellii Villa, 1871
+ Unio bednalli Tate, 1882

Diplodon (Hyridella s.s.) australis var. legrandi (Petterd, 1889)
+ Unio depressus Reeve, 1864

Diplodon (Hyridella s.s.) cultelliformis (Conrad, 1850)
+ Unio depressa Lamarck, 1819
+ Unio paramattensis Lea, 1862

Diplodon (Hyridella s.s.) dorsuosus (Gould, 1851)
+ Unio napeanensis Conrad, 1850

Diplodon (Hyridella s.s.) evansi (Adams & Angas, 1864)

Diplodon (Hyridella s.s.) flyensis (Tapparone Canefri, 1883)

Diplodon (Hyridella s.s.) glenelgensis (Dennant, 1898)

Diplodon (Hyridella s.s.) jeffreysianus (Lea, 1871)

Diplodon (Hyridella s.s.) lessoni (Küster, 1856)
+ Unio australis Küster, 1861

Diplodon (Hyridella s.s.) lutulentus (Gould, 1851)
+ Unio lutulentus Gould, 1850
+ Unio lutulentus Reeve, 1865

Diplodon (Hyridella s.s.) menziezi [sic] (Gray in Dieffenbach, 1843)
+ Unio aucklandicus Gray, 1843
+ Unio menziesianus Reeve, 1865
+ Unio aucklandicus Reeve, 1865
+ Margaron (Unio) menzieni Lea, 1870

Diplodon (Hyridella s.s.) menziezi [sic] var. depauperatus (Hutton, 1884)

Diplodon (Hyridella s.s.) menziezi [sic] var. hochstetteri (Dunker, 1862)

Diplodon (Hyridella s.s.) menziezi [sic] var. rugatus (Hutton, 1884)

Diplodon (Hyridella s.s.) moretonicus (Reeve, 1865)
+ Margaron (Unio) mortonicus Lea, 1870

Diplodon (Hyridella s.s.) profugus (Gould, 1851)

Diplodon (Hyridella s.s.) vittatus (Lea, 1859)

Diplodon (Hyridella s.s.) waikarensis (Colenso, 1845)

Diplodon (Hyridella s.s.) wilsonii (Lea, 1859)
+ Unio (Alasmodon) stuarti Adams & Angas, 1863

Diplodon (Hyridella s.s.) zelebori (Dunker, 1866)

Diplodon (Hyridella sec. Cucumaria) mutabilis (Lea, 1859)

Diplodon (Hyridella sec. Cucumaria) novae-hollandiae (Gray, 1834)
+ Unio cucumoides Lea, 1840
+ Unio cumingianus Dunker, 1852

Diplodon (Hyridella sec. Cucumaria) shuttleworthii (Lea, 1856)
+ Unio mutabilis Reeve, 1865
+ Unio angasi Sowerby, 1867

Diplodon (Laevirostris) stagnorum (Dautzenberg, 1890)

Diplodon (s.s.) acutirostris (Lea, 1866)

Diplodon (s.s.) aethiops (Lea, 1860)

Diplodon (s.s.) aethiops var. piricicabana [sic] (von Ihering, 1893)

Diplodon (s.s.) ampullaceus (Lea, 1866)

Diplodon (s.s.) aplatus (‘Swainson ms’ Reeve, 1865)

Diplodon (s.s.) apprimus (Lea, 1866)

Diplodon (s.s.) atratus (Sowerby, 1839)
+ Unio limensis Küster, 1856
+ Unio dunkerianus Lea, 1856
+ Unio jacobaeus Philippi, 1869
+ Unio landbecki Philippi, 1869
+ Unio diplodon Philippi, 1869

Diplodon (s.s.) aureus Simpson, 1900
+ Unio auratus Küster, 1861

Diplodon (s.s.) beskeanus [sic] (Dunker, 1848)

Diplodon (s.s.) binneyi (Lea, 1845)

Diplodon (s.s.) brownii (Lea, 1856)

Diplodon (s.s.) burroughianus (Lea, 1834)
+ Unio burroughianus d’Orbigny, 1835

Diplodon (s.s.) caipira (von Ihering, 1893)

Diplodon (s.s.) casaeblancae (Philippi, 1848)
+ Unio casablancae Lea, 1852
+ Unio longus Philippi, 1869
+ Unio colchaguensis Philippi, 1869
+ Unio foncki Philippi, 1869
+ Unio funcki Paetel, 1890

Diplodon (s.s.) charruanus (d’Orbigny, 1835)
+ Unio faba d’Orbigny, 1835

Diplodon (s.s.) childreni (Gray in Griffith & Pidgeon, 1834)

Diplodon (s.s.) chilensis (Gray, 1828)
+ Unio smithii Griffith & Pidgeon, 1833
+ Unio auratus Philippi, 1847
+ Unio araucanus Philippi, 1847
+ Unio chilensis Sowerby, 1867

Diplodon (s.s.) chiloënsis (Küster, 1856)

Diplodon (s.s.) coriaceus (Dunker, 1848)

Diplodon (s.s.) cuprinus Simpson, 1900
+ Unio fragilis Reeve, 1865

Diplodon (s.s.) delodontus (Lamarck, 1819)
+ Unio lacteolus Lea, 1834
+ Unio delodon Martens, 1868

Diplodon (s.s.) demararaensis [sic] (Lea, 1859)
+ Unio demararaensis Lea, 1859
+ Unio demarasensis Paetel, 1890

Diplodon (s.s.) divaricatus (Lea, 1834)

Diplodon (s.s.) effulgens (Lea, 1856)
+ Unio eurhynchus Küster, 1861

Diplodon (s.s.) expansus (Küster, 1856)

Diplodon (s.s.) firmus (Lea, 1866)

Diplodon (s.s.) firmus var. boettgeri (von Ihering, 1893)

Diplodon (s.s.) frenzelii [sic] (von Ihering, 1893)

Diplodon (s.s.) gassiesi (Küster, 1856)
+ Unio auratus Lea, 1838

Diplodon (s.s.) granosus (Bruguiere, 1972)
+ Unio multistriatus Lea, 1831
+ Unio psammactinus Philippi, 1848
+ Unio pfeifferi Dunker, 1849
+ Unio famelicus Gould, 1850
+ Unio niloticus Sowerby, 1868

Diplodon (s.s.) granuliferus (Dunker, 1848)
+ Unio granulifer Paetel, 1890

Diplodon (s.s.) greefianus [sic] (von Ihering, 1893)

Diplodon (s.s.) hylaeus (d’Orbigny, 1835)
+ Unio guaraniana d’Orbigny, 1835

Diplodon (s.s.) leai Simpson, 1900
+ Margarita (Unio) modestus Lea, 1836

Diplodon (s.s.) lepidior (Lea, 1870)
+ Unio lepidus Lea, 1860

Diplodon (s.s.) locellus (Lea, 1866)

Diplodon (s.s.) martensi (von Ihering, 1893)

Diplodon (s.s.) modestus (‘Charpentier ms’ Küster, 1856)
+ Unio ianthinus Philippi, 1869
+ Unio valdivianus Philippi, 1869
+ Unio montanus Philippi, 1869

Diplodon (s.s.) molinae (Philippi, 1847)
+ Unio auratus Sowerby, 1866

Diplodon (s.s.) obtusus (d’Orbigny, 1835)

Diplodon (s.s.) parallelipipedon [sic] (Lea, 1834)
+ Unio bonplandii Lea, 1870

Diplodon (s.s.) parcus (Lea, 1866)

Diplodon (s.s.) patagonicus (d’Orbigny, 1835)
+ Unio patagonicus Reeve, 1865

Diplodon (s.s.) paulista (von Ihering, 1893)

Diplodon (s.s.) pazi (Hidalgo, 1868)

Diplodon (s.s.) peculiaris (Lea, 1866)
+ Unio nitidulus Küster, 1861
+ Unio paraguayensis Lea, 1866

Diplodon (s.s.) piceus (Lea, 1860)
+ Diplodon (s.s.) suppositus Simpson, 1914

Diplodon (s.s.) piger (Lea, 1860)

Diplodon (s.s.) prunoides (Lea, 1868)

Diplodon (s.s.) quadrans (Lea, 1860)

Diplodon (s.s.) rhombeus (Wagner, 1827)

Diplodon (s.s.) rhuacoicus (d’Orbigny, 1835)
+ Unio rhyacoicus Martens, 1868
+ Monocondylaea rhyacoeca Paetel, 1890

Diplodon (s.s.) rhuaconicus (‘Pfeiffer teste Charpentier’ Küster, 1856)

Diplodon (s.s.) rudus (Lea, 1859)
+ Unio rudis Doering, 1875

Diplodon (s.s.) rufofuscus (Lea, 1865)

Diplodon (s.s.) solidulus (Philippi, 1869)

Diplodon (s.s.) suavidicus (Lea, 1856)

Diplodon (s.s.) trifidus (Lea, 1860)

Diplodon (s.s.) uruguayensis (Lea, 1860)

Diplodon (s.s.) wagnerianum Simpson, 1900
+ Diplodon ellypticum Wagner, 1827
+ Diplodon ellipticum Wagner, 1827
+ Unio ellipticus Küster, 1861

Diplodon (s.s.) wheatleyanus (Lea, 1856)

Diplodon (s.s.) wymanii (Lea, 1860)

Diplodon aethiopiformis (von Ihering)

Diplodon bishoffi (von Ihering)

Diplodon damnoica (d’Orbigny)

Diplodon depressa (d’Orbigny, 1835)

Diplodon fokkesi (Dunker, 1852)

Diplodon guahybae (von Ihering)

Diplodon iheringi (Clessin)

Diplodon koseretzi [sic] (Clessin, 1888)

Diplodon macropterus (Dunker, 1846)

Diplodon paraguayanus (von Martens, 1895)

Diplodon sebastanae (von Ihering)

Diplodon zealandicus (‘Gray’ Paetel, 1890)

Dromus caperatus (Lea, 1845)
+ Unio abacoides Haldeman, 1846

Dromus dromus [sic] (Lea, 1834)

Fossula balzani von Ihering, 1893

Fossula fossiculifera (d’Orbigny, 1835)

Gabillotia euphratica (Bourguignat, 1852)
+ Unio churchilleanus Sowerby, 1868

Gabillotia euphratica var. churchillianus (Bourguignat, 1857)
+ Monocondyloea rhomboidea Lea, 1859

Gabillotia locardi Servain, 1890

Gabillotia opperti (Bourguignat, 1856)
+ Margaritana euphratica Kobelt, 1886

Gabillotia pseudodopsis (Locard, 1883)

Gibbosula crassa (Wood, 1815)
+ Mya ponderosa Dillwyn, 1817

Glabaris (s.s.) amazonensis (Lea, 1860)
+ Anodon amazoniensis Sowerby, 1870

Glabaris (s.s.) bridgesii (Lea, 1868)

Glabaris (s.s.) crassus (Swainson, 1823)

Glabaris (s.s.) crispatus (Bruguiere, 1972)
+ Anodonta puberula Gould, 1852
+ Anodon reticulatus Sowerby, 1867

Glabaris (s.s.) cylindraceus (Lea, 1838)

Glabaris (s.s.) elongatus (Swainson, 1823)
+ Anodonta solidula Deville & Hupé, 1850
+ Anodonta wheatleyi Lea, 1852
+ Anodon dactylus Sowerby, 1867
+ Anodon amethystus Sowerby, 1869

Glabaris (s.s.) forbesianus (Lea, 1860)

Glabaris (s.s.) georginae (Griffith, 1834)

Glabaris (s.s.) glaucus (Valenciennes, 1833)
+ Anodon glauca Gould, 1850
+ Anodon ciconia Gould, 1851
+ Anodonta ciconia Carpenter, 1857
+ Anodonta burroughiana Chenu, 1858
+ Anodon glaucus Sowerby, 1870

Glabaris (s.s.) glaucus var. sinaloensis (Crosse & Fischer, 1883)

Glabaris (s.s.) granadensis (Lea, 1868)

Glabaris (s.s.) grijalvae (Morelet, 1884)
+ Anodonta grijoloae Paetel, 1890

Glabaris (s.s.) hertwigii (von Ihering, 1890)

Glabaris (s.s.) holtonis (Lea, 1857)
+ Anodon haltonis Sowerby, 1870

Glabaris (s.s.) iheringi (Clessin, 1882)

Glabaris (s.s.) incarum (Philippi, 1869)

Glabaris (s.s.) inæquivalvis [sic] (Lea, 1868)
+ Anodonta lenticularis Lea, 1868
+ Anodon glabrus Sowerby, 1870
+ Anodon montezianus Sowerby, 1870
+ Anodonta viridana Clessin, 1876

Glabaris (s.s.) jewittianus [sic] (Lea, 1868)
+ Anodonta jewettii Lea, 1868

Glabaris (s.s.) leotandi [sic] (Guppy, 1864)

Glabaris (s.s.) limnoicus (d’Orbigny, 1835)
+ Anodonta lymnoica Chenu, 1858

Glabaris (s.s.) lingulatus (Húpe, 1857)

Glabaris (s.s.) longinus (Spix, 1827)

Glabaris (s.s.) lucidus (d’Orbigny, 1835)

Glabaris (s.s.) luteolus (Lea, 1858)

Glabaris (s.s.) membranaceus (Maton, 1811)
+ Unio membranacea Hanley, 1843
+ Unio subtrapezius Philippi, 1847

Glabaris (s.s.) montezuma (Lea, 1841)

Glabaris (s.s.) moricandii (Lea, 1860)
+ Anodon exoticus Sowerby, 1867
+ Anodonta angustata Clessin, 1876

Glabaris (s.s.) mortonianus (Lea, 1834)

Glabaris (s.s.) napoensis (Lea, 1868)

Glabaris (s.s.) patagonicus (Lamarck, 1819)
+ Anodon trapezeus Wagner, 1827
+ Anodonta latomarginata Lea, 1834
+ Anodonta membranacea d’Orbigny, 1846
+ Anodonta solida Küster, 1853
+ Anodonta uruguayensis Lea, 1860
+ Anodonta sinuosa Clessin, 1873
+ Anodonta serpentina Clessin, 1876

Glabaris (s.s.) patagonicus var. felix Pilsbry, 1869 [sic]

Glabaris (s.s.) pazii (Lea, 1866)

Glabaris (s.s.) philippianus Simpson, 1900
+ Anodonta subsinuata Philippi, 1869

Glabaris (s.s.) puelchanus (d’Orbigny, 1835)
+ Anodonta obtusula Hupé, 1857

Glabaris (s.s.) radiatus (Spix, 1827)

Glabaris (s.s.) rotundus (Spix, 1827)
+ Anodonta cailliaudii Lea, 1860
+ Anodon caillaudii Sowerby, 1867

Glabaris (s.s.) rubicundus (Lea, 1860)

Glabaris (s.s.) schomburgianus (Sowerby, 1870)
+ Anodonta schomburgkiana Clessin, 1876

Glabaris (s.s.) simpsonianus Pilsbry, 1896

Glabaris (s.s.) sinuosus (Lamarck, 1819)
+ Anodon sinuosis Swainson, 1841

Glabaris (s.s.) sirionis [sic] (d’Orbigny, 1835)
+ Unio (Anodontes) ferrarisii d’Orbigny, 1835

Glabaris (s.s.) strebelii (Lea, 1868)
+ Margaron (Anodonta) strebellii Lea, 1870

Glabaris (s.s.) tortilis (Lea, 1852)

Glabaris (s.s.) trapesialis (Lamarck, 1819)
+ Anodonta trapezialis Blainville, 1825
+ Anodon giganteus Wagner, 1827
+ Anodon susannae Griffith & Pidgeon, 1833
+ Anodon penicillatus Gray, 1834
+ Iridina trapezialis d’Orbigny, 1835
+ Anodon ciconia Gould, 1851
+ Anodon blainvilleana Sowerby, 1867

Glabaris (s.s.) trapesialis var. anserinus (Spix, 1827)

Glabaris (s.s.) trapesialis var. cygnæformis [sic] (Pilsbry, 1896)

Glabaris (s.s.) trapesialis var. exoticus (Lamarck, 1819)

Glabaris (s.s.) trapesialis var. moretonianus (Sowerby, 1867)

Glabaris (s.s.) trapesialis var. rioplatensis (Sowerby, 1870)
+ Anodon ciconia Sowerby, 1870

Glabaris (s.s.) trapesialis var. scriptus (Sowerby, 1867)
+ Anodon subsinuatus Sowerby, 1867
+ Anodon areolatus Sowerby, 1867
+ Anodonta bahiensis Clessin, 1873

Glabaris (s.s.) trautwinianus (Lea, 1852)
+ Anodon ovata Swainson, 1841
+ Margaron (Anodonta) troutwiniana Lea, 1852
+ Anodon trautwinianus Sowerby, 1870
+ Anodonta carthagena Simpson, 1900

Glabaris (s.s.) trigonus (Spix, 1827)
+ Unio (Anodontes) chiquitana d’Orbigny, 1835
+ Anodonta castelnaudii Hupé, 1857
+ Anodonta subrostrata Philippi, 1869
+ Anodonta ucayalensis Philippi, 1869

Glabaris (s.s.) umbonatus (Sowerby, 1870)
+ Anodon ciconia Sowerby, 1870

Glabaris (s.s.) weddellii (Húpe, 1857)

Glabaris (s.s.) wymanii (Lea, 1860)

Glabaris (sec. Styganodon) bambousearum (Morelet, 1851)

Glabaris (sec. Styganodon) clessini (Fischer, 1890)
+ Mycetopus plicatus Clessin, 1882
+ Glabaris nehringi Ihering, 1893

Glabaris (sec. Styganodon) lituratus (Spix, 1827)
+ Anodon litturatum Moricand, 1837

Glabaris (sec. Styganodon) obtusus (Spix, 1827)

Glabaris (sec. Styganodon) pastasanus (Clessin, 1879)

Glabaris (sec. Styganodon) schröterianus (Lea, 1852)

Glabaris (sec. Styganodon) soleniformis (d’Orbigny, 1835)
+ Anodon solenidea Sowerby, 1867

Glabaris (sec. Styganodon) tenebricosus (Lea, 1834)
+ Anodon tenebrosa Sowerby, 1867

Glabaris (sec. Virgula) ensiformis (Spix, 1827)

Glabaris (sec. Virgula) falsus Simpson, 1900

Glabaris (sec. Virgula) legumen (von Martens, 1888)

Glabaris aperta (Rafinesque, 1832)

Glabaris atrovireus [sic] (Philippi, 1848)

Glabaris bergi (von Ihering, 1893)

Glabaris brevis (Sowerby, 1870)

Glabaris carinata (Dunker, 1858)

Glabaris cheeziana (Sowerby, 1867)

Glabaris giullaini (‘Recluz’ Adams & Adams, 1857)

Glabaris nicaragua (Philippi, 1848)

Glabaris paphos (Rafinesque, 1832)

Glabaris porcifer (Gray, 1834)

Glabaris spixii (d’Orbigny, 1835)

Glabaris tehuantepecensis (Crosse & Fischer, 1894)

Glabaris wallisi (Mousson, 1869)

Glebula rotundata (Lamarck, 1819)
+ Unio suborbiculata Lamarck, 1819
+ Unio glebulus Say, 1831
+ Unio subglobosus Lea, 1834
+ Unio grandensis Conrad, 1855
+ Unio rotundatus Reeve, 1865

Gonidea angulata (Lea, 1838)
+ Anodon feminalis Gould, 1850
+ Anodonta randalli Trask, 1854
+ Anodon biangulata Sowerby, 1869

Grandidieria anceyi Bourguignat, 1885
+ Unio burtoni E.A. Smith, 1881

Grandidieria bourguignati Joubert in Bourguignat, 1888

Grandidieria burtoni (Woodward, 1859)
+ Grandidieria cyrenopsis Bourguignat, 1885

Grandidieria burtoni var. insignis Bourguignat, 1885

Grandidieria burtoni var. servainiana Bourguignat, 1885

Grandidieria burtoni var. sturanyi (von Martens, 1897)

Grandidieria callista Bourguignat, 1888

Grandidieria elongata Bourguignat, 1885

Grandidieria giraudi Bourguignat, 1885

Grandidieria gravida Bourguignat, 1885
+ Grandidieria rostrata Bourguignat, 1885
+ Unio rostralis Martens, 1897

Grandidieria incarnata Bourguignat, 1885

Grandidieria locardiana Bourguignat, 1885

Grandidieria mira Bourguignat, 1885

Grandidieria rhynchonella Bourguignat, 1888

Grandidieria rotundata Bourguignat, 1885

Grandidieria smithi Bourguignat, 1885
+ Unio burtoni E.A. Smith, 1881

Grandidieria tanganyicensis (Smith, E.A., 1880)
+ Unio tanganikanus Bourguignat, 1883

Grandidieria thomsoni (Smith, E.A., 1880)
+ Grandidieria corbicula Bourguignat, 1885
+ Grandidieria granulosa Bourguignat, 1885
+ Grandidieria singularis Bourguignat, 1888

Harmandia somboriensis (Rochebrune, 1881)

Hemilastena ambigua (Say, 1825)
+ Unio hildrethianus Lea, 1834
+ Alasmidonta dubia Ferussac, 1835

Hyria (Triquetrana) stevensi (Lea, 1871)

Hyria (s.s.) corrugata Lamarck, 1819
+ Triplodon rugosus Wagner, 1827
+ Mya angulata Wood, 1828
+ Hyria exasperata Sowerby, 1869

Hyria (s.s.) latialata Sowerby, 1869

Hyria (s.s.) rugosissima Sowerby, 1869

Hyria (s.s.) transversa Húpe, 1857

Hyriopsis (Caudiculatus) caudiculatus (von Martens, 1866)
+ Unio infrarostratus Schepman, 1896

Hyriopsis (s.s.) bialatus Simpson, 1900
+ Unio delphinus Lea, 1840
+ Unio delphinus Gruner, 1841
+ Unio megapterus Morelet, 1864

Hyriopsis (s.s.) cumingii (Lea, 1852)

Hyriopsis (s.s.) delaportei (Crosse & Fischer, 1876)

Hyriopsis (s.s.) myersianus (Lea, 1856)
+ Unio housei Lea, 1856

Hyriopsis (s.s.) pinchonianus (Heude, 1883)

Hyriopsis (s.s.) schlegeli (von Martens, 1861)

Hyriopsis (s.s.) sutrangensis (Morlet, 1889)

Hyriopsis (s.s.) vagulus (Fischer, 1891)
+ Unio subtrigonus Sowerby, 1867
+ Unio lamellatus Hanley & Theobald, 1870

Hyriopsis (s.s.) velthuzeni [sic] (Schepman, 1895)

Iheringella balzani (von Ihering, 1893)

Iheringella isocardioides (Lea, 1856)
+ Plagiodon isocardiodes Lea, 1856

Iheringella rotundata (Mousson, 1869)

Iheringella semisulcata (Adams, H., 1870)

Lamellidens (Spathopsis) guillaini (Récluz, 1850)

Lamellidens (s.s.) canefrianus Simpson, 1900
+ Unio protensus Tapparone Canefri, 1889

Lamellidens (s.s.) consobrinus (Lea, 1859)
+ Unio corbeti Deschamps, 1892

Lamellidens (s.s.) corrianus (Lea, 1834)

Lamellidens (s.s.) exanthematicus (Küster, 1861)

Lamellidens (s.s.) generosus (Gould, 1847)
+ Unio lamellatus Sowerby, 1868

Lamellidens (s.s.) jenkinsianus (Benson, 1862)

Lamellidens (s.s.) lamellatus (Lea, 1838)
+ Unio layardii Lea, 1859

Lamellidens (s.s.) marginalis (Lamarck, 1819)
+ Unio groenlandicus Schröter, 1779
+ Unio testudinarius Spengler, 1793
+ Unio anodontina Lamarck, 1819
+ Symphynota bilineata Lea, 1831
+ Unio evanescens Mousson, 1849

Lamellidens (s.s.) marginalis var. candaharicus (Hanley & Theobald, 1876)

Lamellidens (s.s.) marginalis var. cylindricus (Hanley & Theobald, 1876)

Lamellidens (s.s.) marginalis var. hanleyi Simpson, 1900
+ Unio marginalis var. corriana Hanley & Theobald, 1872

Lamellidens (s.s.) marginalis var. obesus (Hanley & Theobald, 1876)
+ Unio corrianus Sowerby, 1868

Lamellidens (s.s.) marginalis var. tricolor (Küster, 1856)

Lamellidens (s.s.) pulcher (Tapparone Canefri, 1889)

Lamellidens (s.s.) scutum (Sowerby, 1868)

Lamellidens (s.s.) thwaitesii (Lea, 1859)
+ Unio consobrinus Hanley & Theobald, 1872
+ Unio thwaitesii Hanley & Theobald, 1872

Lampsilis (Carunculina) corvunculus (Lea, 1868)

Lampsilis (Carunculina) cromwellii (Lea, 1865)
+ Unio marginis Lea, 1865

Lampsilis (Carunculina) cylindrellus (Lea, 1868)

Lampsilis (Carunculina) germanus (Lea, 1861)
+ Unio granulatus Lea, 1861

Lampsilis (Carunculina) glans (Lea, 1831)
+ Unio glans Conrad, 1836

Lampsilis (Carunculina) haleianus (Lea, 1843)

Lampsilis (Carunculina) mearnsi Simpson, 1900

Lampsilis (Carunculina) mœstus (Lea, 1841)
+ Unio maestus Lea, 1842
+ Unio maestus Küster, 1861

Lampsilis (Carunculina) parvus (Barnes, 1823)

Lampsilis (Carunculina) paulus (Lea, 1840)
+ Unio corvinus Lea, 1868

Lampsilis (Carunculina) pullus (Conrad, 1838)

Lampsilis (Carunculina) texasensis [sic] Lea
+ Unio parvus Conrad, 1836
+ Unio bairdianus Lea, 1857
+ Unio bealei Lea, 1862
+ Unio texasianus Sowerby, 1866

Lampsilis (Carunculina) texasensis [sic] var. compressus Simpson, 1900

Lampsilis (Proptera) alabamensis (Conrad, 1834)
+ Symphynota inflata Lea, 1831

Lampsilis (Proptera) alatus (Say, 1816)
+ Metaptera megaptera Rafinesque, 1820

Lampsilis (Proptera) alatus var. poulsoni (Conrad, 1834)
+ Unio inflatus Conrad, 1836

Lampsilis (Proptera) alienigenus (Crosse & Fischer, 1893)

Lampsilis (Proptera) amphichaenus (Frierson, 1898)

Lampsilis (Proptera) aztecorum (Philippi, 1847)

Lampsilis (Proptera) berlandierii (Lea, 1857)

Lampsilis (Proptera) coloradoensis (Lea, 1856)

Lampsilis (Proptera) delphinulus (Morelet, 1849)

Lampsilis (Proptera) explicatus (Morelet, 1849)
+ Margaron (Unio) semigranosus Lea, 1870
+ Unio explicatus Fischer & Crosse, 1894

Lampsilis (Proptera) gouldii (Lea, 1845)

Lampsilis (Proptera) gracilis (Barnes, 1823)
+ Unio fragilis Swainson, 1823
+ Unio (Niaa) atrata Swainson, 1823
+ Mya plana Eaton, 1826

Lampsilis (Proptera) laevissimus (Lea, 1829)
+ Unio ohiensis Say, 1834
+ Unio discoideus Sowerby, 1866

Lampsilis (Proptera) largillierti (Philippi, 1847)

Lampsilis (Proptera) leptodon (Rafinesque, 1820)
+ Anodon purpurascens Swainson, 1823
+ Unio velum Say, 1829
+ Symphynota tenuissima Lea, 1829
+ Unio leptodon Conrad, 1836

Lampsilis (Proptera) lividus Simpson, 1900
+ Unio testudineus Reeve, 1865

Lampsilis (Proptera) metallicus (Say, 1831)
+ Unio cuprinus Lea, 1831
+ Unio aereus Reeve, 1865
+ Unio cuprinus Sowerby, 1868

Lampsilis (Proptera) paludosus (Morelet, 1849)

Lampsilis (Proptera) permiscens (Lea, 1859)

Lampsilis (Proptera) planivalvis (Morelet, 1851)

Lampsilis (Proptera) purpuratus (Lamarck, 1819)
+ Unio ater Lea, 1829
+ Unio lugubris Say, 1832
+ Unio atra Deshayes, 1832
+ Unio dolosus Lea, 1860
+ Unio poulsoni Sowerby, 1866
+ Unio dolosus Sowerby, 1866

Lampsilis (Proptera) rovirosai (Pilsbry, 1900)

Lampsilis (Proptera) saladoensis (Lea, 1860)

Lampsilis (Proptera) scutulatus (Morelet, 1849)

Lampsilis (Proptera) tampecoensis [sic] (Lea, 1838)
+ Unio heermannii Lea, 1861

Lampsilis (Proptera) tecomatensis (Lea, 1841)

Lampsilis (Proptera) umbrosus Lea, 1856
+ Unio veracruzensis Lea, 1868

Lampsilis (s.s.) altilis Conrad

Lampsilis (s.s.) biangulatus Lea
+ Unio biangularis Lea, 1840

Lampsilis (s.s.) binominatus Simpson
+ Unio lineatus Lea, 1840

Lampsilis (s.s.) breviculus Call

Lampsilis (s.s.) breviculus var. brittsi Simpson

Lampsilis (s.s.) capax Green
+ Symphynota globosa Lea, 1834

Lampsilis (s.s.) cariosus Say
+ Unio ovata Lamarck, 1819
+ Unio ovata Valenciennes, 1827
+ Unio viridis Ferussac, 1835
+ Unio cariosus De Kay, 1843
+ Unio oratus Conrad, 1849

Lampsilis (s.s.) clarkianus Lea
+ Unio spillmanii Lea, 1861

Lampsilis (s.s.) delumbis Conrad

Lampsilis (s.s.) dolabræformis Lea

Lampsilis (s.s.) doliaris Lea

Lampsilis (s.s.) excavatus Lea
+ Unio ovatus var. ornatus Conrad, 1835

Lampsilis (s.s.) gerhardtii Lea

Lampsilis (s.s.) multiradiatus Lea
+ Unio fasciolus Say, 1834
+ Unio perradiatus Lea, 1858
+ Unio altilis Reeve, 1865
+ Unio perovalis Sowerby, 1866

Lampsilis (s.s.) ochraceus Say
+ Unio crocatus Lea, 1841
+ Unio rosaceus Conrad, 1849
+ Unio troostensis Sowerby, 1866
+ Unio affinis Sowerby, 1868

Lampsilis (s.s.) ovatus Say
+ Unio ovata Lamarck, 1819

Lampsilis (s.s.) perovalis Conrad

Lampsilis (s.s.) perpastus Lea

Lampsilis (s.s.) splendidus Lea
+ Unio regularis Sowerby, 1866

Lampsilis (s.s.) subvexa Conrad

Lampsilis (s.s.) ventricosus Barnes
+ Unio radiatus Hildreth, 1828
+ Unio occidens Lea, 1829
+ Unio subovatus Lea, 1831
+ Unio cardium Conrad, 1834
+ Unio fasciolus Ferussac, 1835
+ Unio lenis Conrad, 1838
+ Unio ovatus Deshayes, 1839
+ Unio canadensis Lea, 1857
+ Unio ventricosus Sowerby, 1866
+ Unio dolabraeformis Sowerby, 1867
+ Unio subovatus Sowerby, 1868
+ Unio latissimus Sowerby, 1868

Lampsilis (s.s.) ventricosus var. satur Lea

Lampsilis (sec. Eurynia) affinis Lea

Lampsilis (sec. Eurynia) amygdalum Lea
+ Unio lepidus Gould, 1856

Lampsilis (sec. Eurynia) amœnus Lea

Lampsilis (sec. Eurynia) anodontoides Lea
+ Unio teres Say, 1834
+ Lampsilis anodontoides F.C. Baker, 1898

Lampsilis (sec. Eurynia) anodontoides var. floridensis Lea

Lampsilis (sec. Eurynia) apicinus Lea

Lampsilis (sec. Eurynia) approximus Lea

Lampsilis (sec. Eurynia) arkansasensis Lea

Lampsilis (sec. Eurynia) australis Simpson

Lampsilis (sec. Eurynia) borealis A.F. Gray

Lampsilis (sec. Eurynia) bracteatus Gould

Lampsilis (sec. Eurynia) camelopardilis Lea
+ Unio fucatus Lea, 1860

Lampsilis (sec. Eurynia) claibornensis Lea
+ Unio obtusus Lea, 1840
+ Unio pallescens Lea, 1845
+ Unio clairbornensis Sowerby, 1868

Lampsilis (sec. Eurynia) concestator Lea
+ Unio intercedens Lea, 1857
+ Unio fallax Lea, 1857
+ Unio contiguus Lea, 1861
+ Unio bicaelatus Reeve, 1865
+ Unio genuinus Lea, 1868

Lampsilis (sec. Eurynia) constrictus Conrad
+ Unio genthii Lea, 1857

Lampsilis (sec. Eurynia) contrarius Conrad

Lampsilis (sec. Eurynia) dispar Lea

Lampsilis (sec. Eurynia) ellipsiformis Conrad
+ Unio spatulatus Lea, 1845

Lampsilis (sec. Eurynia) fallaciosus (Smith) Simpson
+ Unio anodontoides Reeve, 1865
+ Unio oriens Sowerby, 1868
+ Lampsilis anodontoides F.C. Baker, 1898

Lampsilis (sec. Eurynia) fatuus Lea
+ Unio dactylus Lea, 1840

Lampsilis (sec. Eurynia) gracilior Lea
+ Unio obfuscus Lea, 1857
+ Unio gracillior Lea, 1858

Lampsilis (sec. Eurynia) higginsii Lea

Lampsilis (sec. Eurynia) hydianus Lea
+ Unio placitus Lea, 1852
+ Unio hydianus Küster, 1861