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)

Utterbackia F.C. Baker, 1927
F.C. Baker, 1927, Amer. Midl. Nat. 10(7): 221.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 170.
(correct name for Utterbachia F.C. Baker, 1927)
Type species: Anodonta imbecillis Say, 1829 (orig. desig.) = Utterbackia imbecillis

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)

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)

Anodonta salmonea Sowerby, 1867
‘Lea’ of Authors.
Sowerby, 1867, Conch. Icon. 17: pl. 19, sp. 74.
Frierson, 1927, Check List N. Amer. Naiades: 15.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 155.
(error for Anodonta salmonia Lea, 1838)

Anodonta marginata Baker, 1920
‘Say’ Baker, 1920, unknown publication: 383.
‘Say’ F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 165.
(misidentified reference to Anodonta marginata Say, 1817)

Lampsilis gracilis lacustris F.C. Baker, 1922
F.C. Baker, 1922, Nautilus 35(4): 131.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 237, pl. 80, figs. 5-7; pl. 81, figs. 1-2.
(intro'd as intra-sp. of Unio gracilis Barnes, 1823)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209186, L. Butte de Morts, Wisc.

Anodontoides birgei F.C. Baker, 1923
F.C. Baker, 1923, Nautilus 36(4): 123.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 180, pl. 68, figs. 1-4.
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209188, Sturgeon Bay, Wisc.

Utterbackia imbecillis fusca F.C. Baker, 1927
F.C. Baker, 1927, Amer. Midl. Nat. 10(7): 222.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 175, pl. 103, figs. 12-14.
(intro'd as intra-sp. of Anodonta imbecillis Say, 1829)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209141, Sturgeon Bay, Wisc.

Carunculina parva cahni F.C. Baker, 1927
F.C. Baker, 1927, Amer. Midl. Nat. 10(7): 222.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 253, pl. 105, figs. 14-18.
(intro'd as intra-sp. of Unio parvus Barnes, 1823)
Type(s): HOLOTYPE (ORIG. DESIG.) INHS_82281, Neosha Mill Pond, Dodge Co., Wisconsin.

Lampsilis siliquoidea pepinensis F.C. Baker, 1927
F.C. Baker, 1927, Amer. Midl. Nat. 10(7): 223.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 275, pl. 90, figs. 2-5.
(intro'd as intra-sp. of Unio siliquoideus Barnes, 1823)
Type(s): LECTOTYPE UMMZ_209208, L. Pepin, Lake City, Minnesota.

Quadrula (Quadrula) quadrula bullocki F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 87, pl. 46, figs. 1-3.
(intro'd as intra-sp. of Obliquaria (Quadrula) quadrula Rafinesque, 1820)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209203, Fox River, nr. De Pere, Wisc.

Truncilla truncata var. lacustris F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 227, pl. 78, figs. 1-2.
(intro'd as intra-sp. of Truncilla truncata Rafinesque, 1820)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209214, Lake Winnebago, Wisconsin.

Sphaerium solidulum var. winnebagoense F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): ??.
(intro'd as intra-sp. of Cyclas solidula Prime, 1852)

Pisidium fallax pressum F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): ??.
(intro'd as intra-sp. of Pisidium fallax Sterki, 1896)

Lampsilis ventricosa perglobosa F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 285, pl. 93, figs. 1-4.
(intro'd as intra-sp. of Unio ventricosus Barnes, 1823)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209195, Lake Pepin, Lake City, Minnesota.

Lampsilis ventricosa winnebagoensis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 291, pl. 94, figs. 1-4.
(intro'd as intra-sp. of Unio ventricosus Barnes, 1823)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209212, L. Winnebago, nr. Oshkosh, Wis.

Sphaerium flavum var. foxense F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): ??.
(intro'd as intra-sp. of Cyclas flava Prime, 1852)

Alasmidonta (Pressodonta) calceolus danielsi F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 187, pl. 69, fig. 2; pl. 72, figs. 7-11.
(intro'd as intra-sp. of Unio calceolus Lea, 1828)
Type(s): HOLOTYPE (ORIG. DESIG.) INHS_82276, Moots Creek, White County, Indiana.

Lampsilis siliquoidea chadwicki F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 279, pl. 91, figs. 5-8.
(intro'd as intra-sp. of Unio siliquoideus Barnes, 1823)
Type(s): LECTOTYPE UMMZ_209200, Lake Winnebago, Wisconsin.

Lasmigona costata nuda F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 145, pl. 59, fig. 3-6.
(intro'd as intra-sp. of Alasmidonta costata Rafinesque, 1820)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209131, Red Cedar R., Chetek, Wis.

Lasmigona costata pepinensis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 144, pl. 59, figs. 1-2.
(intro'd as intra-sp. of Alasmidonta costata Rafinesque, 1820)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209133, L. Pepin, Wisconsin.

Cyclonaias tuberculata compressa F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 107, pl. 75, figs. 1-2.
(intro'd as intra-sp. of Obliquaria (Rotundaria) tuberculata Rafinesque, 1820)
Type(s): HOLOTYPE (ORIG. DESIG.) INHS_82236, Big Vermilion River, 0.5 mi below junction with Middle Fork, [Vermilion Co.], Illinois.

Alasmidonta (Decurambis) marginata variabilis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 194, pl. 69, figs. 4-9.
(intro'd as intra-sp. of Alasmidonta marginata Say, 1818)
Type(s): LECTOTYPE UMMZ_209183, Red Cedar R., Chetek, Wis.

Fusconaia undata wagneri F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 64, pl. 40, figs. 1-3.
(intro'd as intra-sp. of Unio undatus Barnes, 1823)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209194, Lake Pepin, Lake City, Minnesota.

Strophitus rugosus pepinensis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 204, pl. 74, fig. 8.
(intro'd as intra-sp. of Anodon rugosus Swainson, 1822)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209137, L. Pepin, Lake City, Wisc.

Strophitus rugosus winnebagoensis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 205, pl. 74, figs. 1-6.
(intro'd as intra-sp. of Anodon rugosus Swainson, 1822)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209201, Lake Winnebago, Wisconsin.

Strophitus rugosus lacustris F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 207, pl. 75, figs. 6-8.
(intro'd as intra-sp. of Anodon rugosus Swainson, 1822)
Type(s): HOLOTYPE (ORIG. DESIG.) INHS_82463, Oconomowoc Lake, Waukesha Co., Wisconsin.

Alasmidonta (Pressodonta) calceolus magnalacustris F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 188, pl. 69, fig. 3; 72, figs. 12-16.
(intro'd as intra-sp. of Unio calceolus Lea, 1828)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_209215, Sturgeon Bay, Wisc.

Sphaerium bakeri F.C. Baker, 1928
‘Sterki’ F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): ??.

Pleurobema coccineum var. mississippiensis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 121, pl. 53, figs. 1-5.
(intro'd as intra-sp. of Unio coccineus Conrad, 1836)
Type(s): HOLOTYPE (ORIG. DESIG.) INHS_82273, Lake Pepin, Wisconsin.

Actinonaias carinatus (Barnes, 1823)
+ Unio crassus Say, 1817
+ Unio ligamentina Lamarck, 1819
+ Unio ellipticus Barnes, 1823

Alasmidonta (Decurambis) marginata Say, 1819
+ Decurambis scriptum Rafinesque, 1831

Alasmidonta (Decurambis) marginata truncata (Wright, B.H., 1898)

Alasmidonta (Decurambis) marginata variabilis Nov. Var.

Alasmidonta (Pressodonta) calceolus (Lea, 1830)
+ Margaritana deltoidea Lea, 1838

Alasmidonta (Pressodonta) calceolus danielsi Var. Nov.

Alasmidonta (Pressodonta) calceolus magnalacustris Var. Nov.

Amblema costata Rafinesque, 1820
+ Unio undulatus Hanley, 1843

Amblema peruviana (Lamarck, 1819)

Amblema rariplicata (Lamarck, 1819)

Anodonta cataracta Say

Anodonta corpulenta Cooper, 1834

Anodonta gigantea Lea, 1834 [sic]

Anodonta grandis Say, 1829
+ Anodonta fluviatilis Lapham, 1860
+ Anodon opalina J.G. Anthony, 1865

Anodonta grandis footiana Lea, 1840
+ Anodonta maryattana Lea, 1840

Anodonta grandis plana Lea, 1834
+ Anodonta palna Lea, 1834
+ Anodonta declivis Conrad, 1834
+ Anodonta ovata Lea, 1838
+ Anodonta salmonia Lea, 1838
+ Anodonta implicata Chadwick, 1906

Anodonta kennicottii Lea, 1861
+ Anodonta simpsoniana Lea, 1861

Anodonta marginata Say, 1917 [sic]
+ Anodonta fragilis Lamarck, 1819
+ Anodonta lacustris Lea, 1857
+ Anodon irisans J.G. Anthony, 1865

Anodontoides birgei Baker, F.C., 1923

Anodontoides ferussacianus (Lea, 1834)
+ Anodonta buchanensis Lea, 1838

Anodontoides ferussacianus subcylindraceus (Lea, 1838)

Arcidens confragosus (Say, 1829)

Carunculina parva (Barnes, 1823)

Carunculina parva cahni (Baker, F.C., 1927)

Cyclonaias tuberculata (Rafinesque, 1820)
+ Unio verrucosus Barnes, 1823

Cyclonaias tuberculata compressa

Cyclonaias tuberculata granifera (Lea, 1838)

Dysnomia (Truncillopsis) triqueter (Rafinesque, 1820)

Dysnomia flexuosa (Raf.)
+ Unio foliatus Hildreth, 1828

Elliptio complanatus (Dillwyn, 1817)

Elliptio crassidens (Lamarck, 1819)
+ Unio (Elliptio) nigra Rafinesque, 1820
+ Unio cuneatus Barnes, 1823

Elliptio dilatatus (Rafinesque, 1820)
+ Unio gibbosus Barnes, 1823
+ Unio mucronatus Barnes, 1823

Elliptio dilatatus delicatus (Simpson, 1900)

Elliptio dilatatus sterkii Grier, 1918

Fusconaia ebenus (Lea, 1831)

Fusconaia flava (Rafinesque, 1820)
+ Unio rubiginosus Lea, 1829

Fusconaia flava parvula Grier, 1918

Fusconaia undata (Barnes, 1823)

Fusconaia undata trigona (Lea, 1831)

Fusconaia undata wagneri Nov. Var.

Lampsilis anodontoides (Lea, 1834)

Lampsilis borealis (Gray)

Lampsilis cariosa (Say)

Lampsilis fallaciosa (Smith, 1899) Simpson

Lampsilis higginsii (Lea, 1857)
+ Unio orbiculatus Call, 1900

Lampsilis radiata (Gmelin)

Lampsilis siliquoidea (Barnes, 1823)
+ Unio luteola Lamarck, 1819
+ Unio inflatus Barnes, 1823

Lampsilis siliquoidea chadwicki Var. Nov.

Lampsilis siliquoidea pepinensis (Baker, F.C., 1927)

Lampsilis siliquoidea rosacea (DeKay, 1843)

Lampsilis superiorensis (Marsh)

Lampsilis ventricosa (Barnes, 1823)

Lampsilis ventricosa lurida (Simpson, 1914)

Lampsilis ventricosa occidens (Lea, 1829)
+ Unio subovatus Lea, 1831

Lampsilis ventricosa perglobosa Var. Nov.

Lampsilis ventricosa winnebagoensis Var. Nov.

Lasmigona (Platynaias) compressa (Lea, 1829)
+ Lasmigona viridis Rafinesque, 1831
+ Margaron (Unio) pressus Lea, 1852

Lasmigona (Pterosyna) complanata (Barnes, 1823)

Lasmigona (Pterosyna) complanata katherinae (Lea, 1838)

Lasmigona (s.s.) costata (Rafinesque, 1820)
+ Alasmodonta rugosa Barnes, 1823

Lasmigona (s.s.) costata nuda Nov. Var.

Lasmigona (s.s.) costata pepinensis Nov. Var.

Leptodea fragilis (Rafinesque, 1820)
+ Unio gracilis Barnes, 1823
+ Unio planus Barnes, 1823

Leptodea fragilis lacustris (Baker, F.C., 1922)

Leptodea leptodon (Rafinesque, 1820)
+ Unio velum Say, 1829
+ Symphynota tenuissima Lea, 1829

Ligumia (Micromya) ellipsiformis (Conrad, 1836)
+ Unio spatulatus Lea, 1845

Ligumia (Micromya) iris novieboraci (Lea, 1838)

Ligumia (s.s.) recta (Lamarck, 1819)
+ Unio sageri Conrad, 1836

Ligumia (s.s.) recta latissima (Rafinesque, 1820)
+ Unio praelongus Barnes, 1823

Ligumia subrostratus (Say)

Margaritana (Cumberlandia) monodonta (Say, 1829)

Megalonaias gigantea (Barnes, 1823)
+ Unio undulatus Barnes, 1823
+ Unio heros Say, 1829
+ Unio multiplicatus Lea, 1831

Obliquaria reflexa Rafinesque, 1820
+ Unio cornutus Barnes, 1823

Obovaria (Pseudoon) olivaria (Rafinesque, 1820)
+ Unio ellipsis Lea, 1828

Plagiola lineolata (Rafinesque, 1820)
+ Obliquaria (Plagiola) depressa Rafinesque, 1820
+ Unio securis Lea, 1829

Plethobasus cyphyus (Rafinesque, 1820)
+ Unio aesopus Green, 1827

Pleurobema clava (Lam.)
+ Pleurobema mytiloides Rafinesque, 1820

Pleurobema coccineum (Conrad, 1836)
+ Unio coccineus Lea, 1838
+ Quadrula kirtlandiana Simpson, 1900

Pleurobema coccineum catillus (Conrad, 1836)
+ Unio mytiloides Lapham, 1860
+ Unio pyramidatus Call, 1885

Pleurobema coccineum mississippiensis Var. Nov.

Pleurobema coccineum solida (Lea, 1838)
+ Unio obliquus Lapham, 1860
+ Quadrula pyramidata Simpson, 1900

Proptera alata (Say, 1817)

Proptera alata megaptera (Rafinesque, 1820)

Proptera capax (Green, 1832)
+ Symphynota globosa Lea, 1834

Proptera laevissima (Lea, 1830)

Ptychobranchus fasciolaris (Rafinesque)
+ Unio phaseolus Hildreth, 1828

Quadrula (s.s.) fragosus (Conrad, 1836)

Quadrula (s.s.) nodulata (Rafinesque, 1820)
+ Unio pustulatus Lea, 1831

Quadrula (s.s.) pustulosus (Lea, 1834)
+ Unio dorfeuillianus Lea, 1838
+ Unio bullatus Conrad, 1838

Quadrula (s.s.) pustulosus prasina (Conrad, 1834)
+ Unio schoolcraftensis Lea, 1834

Quadrula (s.s.) quadrula (Rafinesque, 1820)
+ Unio rugosus Barnes, 1823
+ Unio lacrymosus Lea, 1828
+ Unio asperrimus Lea, 1831

Quadrula (s.s.) quadrula bullocki Nov. Var.

Quadrula (sec. Orthonymus) metanevra (Rafinesque, 1820)
+ Unio nodosus Barnes, 1823

Simpsoniconcha ambigua (Say, 1825)
+ Unio hildrethianus Lea, 1834

Sphaerium aureum (Prime)

Sphaerium aureum declive Sterki

Sphaerium crassum Sterki

Sphaerium simile (Say)
+ Cyclas sulcata Lamarck, 1818

Sphaerium simile planatum Sterki

Strophitus rugosus (Swainson, 1822)
+ Alasmodonta edentula Say, 1829
+ Anodonta wardiana Lea, 1838

Strophitus rugosus lacustris Var. Nov.

Strophitus rugosus pavonius (Lea, 1836)

Strophitus rugosus pepinensis Var. Nov.

Strophitus rugosus winnebagoensis Var. Nov.

Tritogonia verrucosa (Rafinesque, 1820)
+ Unio tuberculatus Barnes, 1823

Truncilla donaciformis (Lea, 1828)
+ Unio zigzag Lea, 1829
+ Unio nervosa Conrad, 1834

Truncilla truncata Rafinesque, 1820
+ Unio elegans Lea, 1831

Truncilla truncata lacustris Var. Nov.

Uniomerus tetralasmus sayi (Ward)

Utterbackia imbecillis (Say, 1829)
+ Anodonta ohiensis Utterback, 1915

Utterbackia imbecillis fusca Baker, F.C., 1927