Flumininea Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 502.
(error for Fluminina Westerlund, 1873)

Mytilus cellensis Menke, 1828
‘Gmelin’ of Authors.
Menke, 1828, Syn. Method. Moll.: 63.
Menke, 1830, Syn. Method. Moll.: 106.
Küster, 1839, Conchyl. Cab. 9(1): 16.
Mörch, 1853, Cat. Conch. Yoldi 2: 48.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 438.
Drouët, 1881, Unionidae Russie: 22.
Bourguignat, 1882, Natural. Sicil. 2 (1): 20 [1].
Westerlund, 1890, Fauna Paläarct. Binnenconch. 2(7): 211.
Zhadin, 1938, Faune USSR Mollusques 4(1): 119.
Modell, 1945, Jena. Z. Med. Naturw. 78: 81.
(error for Mytilus zellensis Gmelin, 1791)

Pisidium obtusale var. fragile Westerlund, 1873
Clessin in Westerlund, 1873, Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 548.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 520.
(intro'd as intra-sp. of Pisidium obtusale Pfeiffer, 1821)

Pisidium rivulare Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 30, pl. 3, figs. 7-11.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 510, fig. 331.

Pisidium henslowianum [sic] var. pulchrum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 15, pl. 1, fig. 9.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 508, fig. 329.
(intro'd as intra-sp. of Tellina henslowana Sheppard, 1825)

Pisidium henslowianum [sic] var. solidum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 15.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 509.
(intro'd as intra-sp. of Tellina henslowana Sheppard, 1825; homonym of Pisidium obtusale solidum Westerlund, 1873)

Pisidium fossarinum var. obtusum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 33.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 514.
(intro'd as intra-sp. of Pisidium fossarinum Westerlund, 1873)

Pisidium fossarinum var. flavescens Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 33, pl. 3, fig. 19.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 514.
(intro'd as intra-sp. of Pisidium fossarinum Westerlund, 1873)

Pisidium fossarinum var. areolatum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 33, pl. 3, fig. 20.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 514.
(intro'd as intra-sp. of Pisidium fossarinum Westerlund, 1873)

Pisidium fossarinum var. modestum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 34, pl. 3, fig. 18.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 515.
(intro'd as intra-sp. of Pisidium fossarinum Westerlund, 1873)

Pisidium fossarinum var. curtum Clessin, 1874
Clessin, 1874, Conch. Cab. 9(3): 34.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 515.
(intro'd as intra-sp. of Pisidium fossarinum Westerlund, 1873)

Musculium strictum Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: ??.
(misidentified reference to Cyclas stricta Normand, 1854)

Anodonta nilsoni Clessin, 1877
‘Küster’ Clessin, 1877, Deutsche Excurs. Moll. Fauna: 444.
‘Küster’ Locard, 1890, Contr. Faune Malacol. Franc. 14: 97 [53].
(error for Anodonta nilssonii Küster, 1842)

Pisidium urinator Clessin, 1877
Clessin, 1874, Bull. Soc. Vaud. Sci. Nat. 13: 149. [nomen nudum]
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 70, pl. 8, 16-18.

Sphaerium sandbergeri Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 483, fig. 311.
Clessin, 1877, Conch. Cab. 9(3): 89, pl. 12, fig. 13-15.

Sphaerium dickinii Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 490, fig. 317.
Clessin, 1877, Conch. Cab. 9(3): 96, pl. 12, figs. 18-20.

Pisidium ovatum Clessin, 1877
Clessin, 1877, Conch. Cab. 9(3): 72, pl. 8, figs. 22-24.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 517, fig. 334.

Anodonta pirvinalis Clessin, 1877
‘Nils’ Clessin, 1877, Deutsche Excurs. Moll. Fauna: 442, fig. 289.
(error for Anodonta piscinalis Nilsson, 1822)

Anodonta mutabilis Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 434.

Anodonta mutabilis var. lacustrina Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 444, fig. 291.
(intro'd as intra-sp. of Anodonta mutabilis Clessin, 1877)

Sphaerium oblongum Clessin, 1877
Clessin, 1877, Conch. Cab. 9(3): 83, pl. 9, figs. 25-27.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 484.

Calyculina rykoltii var. angulata Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 497, fig. 322.
(intro'd as intra-sp. of Cyclas rykoltii Normand, 1844)

Pisidium bandonii Clessin, 1877
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 505.
(error for Pisidium baudonii Clessin, 1873)

Pisidium rivulare var. major Clessin, 1877
Clessin, 1874, Conch. Cab. 9(3): 31.
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 512.
(intro'd as intra-sp. of Pisidium rivulare Clessin, 1874)

Unio pseudolitoralis Clessin, 1877
Clessin, 1875, Verh. Ver. Naturgesch. Hamburg 2: 258 [as ‘pseudo-litoralis’]. [nomen nudum]
Clessin, 1877, Deutsche Excurs. Moll. Fauna: 469, text fig. 305 [as ‘pseudo-litoralis’].

Anodonta complanata Ziegler
+ Anodonta compressa Menke, 1830
+ Anodonta klettii Rossmässler, 1835
+ Anodonta complanata Rossmässler, 1836
+ Anodonta rhomboidea Schlüter, 1838
+ Anodonta complanata Nordenskiold & Nylander, 1856

Anodonta mutabilis Clessin

Anodonta mutabilis var. anatina Linné
+ Anodonta nilssonii Küster, 1842
+ Anodonta tenella Küster, 1842
+ Anodonta anatina rostrata Brot, 1867
+ Anodonta mutabilis moerchiana Clessin, 1876

Anodonta mutabilis var. cellensis [sic] Schroeter
+ Anodonta sulcata Lamarck, 1819
+ Anodonta cellensis Pfeiffer, 1821
+ Anodonta luxata Held, 1837
+ Anodonta cariosa Küster, 1842
+ Anodonta subluxata Küster, 1842
+ Anodonta anserirostris Küster, 1842
+ Anodonta opalina Küster, 1842
+ Anodonta anatina elongata Brot, 1867
+ Anodonta anatina major Brot, 1867
+ Anodonta pictetiana Brot, 1867
+ Anodonta mutabilis fragilissima Clessin, 1876

Anodonta mutabilis var. cygnea Linné
+ Anodonta cygnea Rossmässler, 1835
+ Anodonta cygnea Rossmässler, 1837
+ Anodonta cygnea cordata Rossmässler, 1859
+ Anodonta cygnea lingua Mörch, 1863
+ Anodonta lingbyana Mörch, 1864
+ Anodonta forchthammeri Mörch, 1864

Anodonta mutabilis var. lacustrina m.
+ Anodonta labiata of Authors, unknown year
+ Anodonta callosa Küster, 1839
+ Anodonta charpentierii Küster, 1842
+ Anodonta tumida Küster, 1842
+ Anodonta oviformis Clessin, 1873

Anodonta mutabilis var. piscinalis Nilsson

Calyculina creplini Dunker

Calyculina lacustris Müller
+ Tellina tenera of Authors, unknown year
+ Cyclas calyculata Draparnaud, 1806
+ Tellina tuberculata Alten, 1812

Calyculina lacustris var. major Dupuy
+ Sphaerium brochonianum Bourguignat, 1854

Calyculina lacustris var. steini A. Schmidt
+ Cyclas calyculata Stein, 1850

Calyculina rykoltii Normand

Calyculina rykoltii var. angulata

Calyculina rykoltii var. danica Clessin

Dreissena polymorpha Pallas
+ Mytilus e fluvio wolga Chemnitz, 1795
+ Mytilus chemnitzii Ferussac, 1835
+ Tichogonia chemnitzii Rossmässler, 1835

Margaritana margaritifera Linné
+ Mya margaritifera Gmelin, 1791
+ Unio sinuata C. Pfeiffer, 1825

Pisidium (Gruppe Flumininea) amnicum Müller
+ Cyclas palustris Draparnaud, 1806
+ Cyclas obliqua Lamarck, 1818

Pisidium (Gruppe Flumininea) amnicum var. elongatum Baudon

Pisidium (Gruppe Flumininea) amnicum var. striolatum Baudon

Pisidium (Gruppe Fossarina) bartolomaeum Clessin

Pisidium (Gruppe Fossarina) demissum Clessin

Pisidium (Gruppe Fossarina) foreli Clessin

Pisidium (Gruppe Fossarina) fossarinum Clessin
+ Pisidium fontinale Pfeiffer, 1821

Pisidium (Gruppe Fossarina) fossarinum var. areolatum Clessin

Pisidium (Gruppe Fossarina) fossarinum var. curtum Clessin

Pisidium (Gruppe Fossarina) fossarinum var. flavescens Clessin

Pisidium (Gruppe Fossarina) fossarinum var. modestum Clessin

Pisidium (Gruppe Fossarina) fossarinum var. obtusum Clessin

Pisidium (Gruppe Fossarina) henslowianum [sic] Sheppard
+ Cyclas acuta Pfeiffer, 1821

Pisidium (Gruppe Fossarina) henslowianum [sic] var. pulchrum Clessin

Pisidium (Gruppe Fossarina) henslowianum [sic] var. solidum Clessin

Pisidium (Gruppe Fossarina) intermedium Gassies
+ Pisidium planum Prime, 1870

Pisidium (Gruppe Fossarina) milium Held
+ Pisidium gassiesianum Gassies, 1849
+ Pisidium arcaeforme Malm, 1855
+ Pisidium roseum Jeffreys, 1862

Pisidium (Gruppe Fossarina) milium var. alpestre Clessin

Pisidium (Gruppe Fossarina) milium var. normandianum Dupuy

Pisidium (Gruppe Fossarina) nitidum Jenyns

Pisidium (Gruppe Fossarina) nitidum var. lacustris Clessin

Pisidium (Gruppe Fossarina) obtusale Pfeiffer
+ Cyclas gibba Alder, 1831

Pisidium (Gruppe Fossarina) obtusale var. fragile Clessin

Pisidium (Gruppe Fossarina) obtusale var. personatum Malm

Pisidium (Gruppe Fossarina) ovatum Clessin

Pisidium (Gruppe Fossarina) pallidum Jeffreys

Pisidium (Gruppe Fossarina) pileus Clessin

Pisidium (Gruppe Fossarina) pulchellum Jenyns

Pisidium (Gruppe Fossarina) pusillum Gmelin
+ Cyclas fontinalis Draparnaud, 1806
+ Pisidium pusillum Jenyns, 1832

Pisidium (Gruppe Fossarina) rivulare Clessin

Pisidium (Gruppe Fossarina) rivulare var. major Clessin

Pisidium (Gruppe Fossarina) roseum Scholtz

Pisidium (Gruppe Fossarina) scholtzii Clessin

Pisidium (Gruppe Fossarina) subtruncatum Malm
+ Pisidium dupuyanum Normand, 1854

Pisidium (Gruppe Rivulina) supinum A. Schmidt
+ Pisidium fontinale Stein, 1850
+ Pisidium conicum Baudon, 1857
+ Pisidium baudonii Clessin, 1873

Sphaerium (Grüppe Corneola) corneum Linné
+ Tellina rivalis Müller, 1774

Sphaerium (Grüppe Corneola) corneum var. firmum Clessin
+ Sphaerium oblongum Clessin, 1877

Sphaerium (Grüppe Corneola) corneum var. nucleus Studer
+ Cyclas cornea intumescens Menke, 1830

Sphaerium (Grüppe Corneola) corneum var. sandbergeri Clessin

Sphaerium (Grüppe Corneola) dickinii Clessin

Sphaerium (Grüppe Corneola) draparnaldii [sic] Clessin
+ Sphaerium deshayesianum of Authors, unknown year
+ Cyclas lacustris Draparnaud, 1806
+ Cyclas ovalis Férussac, 1807
+ Cyclas consobrina Blainville, 1818
+ Cyclas lacustris Pfeiffer, 1821

Sphaerium (Grüppe Corneola) dupplicatum Clessin

Sphaerium (Grüppe Corneola) fragile Clessin

Sphaerium (Grüppe Corneola) scaldianum Normand

Sphaerium (Grüppe Cyrenastrum) solidum Normand

Sphaerium (Grüppe Sphaeriastrum) rivicolum Leach in Lam.
+ Cyclas cornea Draparnaud, 1801

Unio batavus Lamarck
+ Unio pictorum Draparnaud, 1806
+ Unio batavus Nilsson, 1822
+ Unio batavus Rossmässler, 1836

Unio batavus var. ater Nilsson
+ Unio consentaneus Rossmässler, 1836
+ Unio reniformis Rossmässler, 1836
+ Unio atrovirens Rossmässler, 1836
+ Unio batavus var. taunica Kobelt, 1886

Unio batavus var. crassus Retz.
+ Unio litoralis Pfeiffer, 1821
+ Unio crassus Nilsson, 1822
+ Unio rugatus Menke, 1828
+ Unio labacensis Rossmässler, 1835
+ Unio fusculus Rossmässler, 1836
+ Unio amnicus Rossmässler, 1836
+ Unio piscinalis Rossmässler, 1836
+ Unio carinthiacus Rossmässler, 1836
+ Unio acutus Rossmässler, 1837
+ Unio batavus var. pusillus Rossmässler, 1844
+ Unio crassus Küster, 1854
+ Unio phaseolus Kobelt, 1879

Unio batavus var. pseudo-litoralis Clessin
+ Unio litoralis Pfeiffer, 1821
+ Unio crassus var. maximus Kobelt, 1872

Unio pictorum Linné
+ Unio pictorum Pfeiffer, 1821
+ Unio pictorum Rossmässler, 1836
+ Unio pictorum Rossmässler, 1837
+ Unio pictorum var. grandis Rossmässler, 1842
+ Unio pictorum var. grandis Rossmässler, 1842

Unio pictorum var. arca Held
+ Unio rostrata Lamarck, 1819
+ Unio deshayesii Michaud, 1831
+ Unio platyrhynchus Rossmässler, 1835
+ Unio graniger J.F. Schmidt, 1840
+ Unio latirostris Küster, 1853
+ Unio praeposterus Küster, 1853
+ Unio nathusii Küster, 1854
+ Unio quinqueannulatus Küster, 1854
+ Unio concinnus Küster, 1854
+ Unio proechus Bourguignat, 1862
+ Unio actephilus Bourguignat, 1862

Unio pictorum var. decollatus Held

Unio pictorum var. limosus Nilsson
+ Unio longirostris Rossmässler, 1836

Unio tumidus Philipsson
+ Unio tumidus Rossmässler, 1836

Unio tumidus var. lacustris Rossm.
+ Unio conus Spengler, 1793

Unio tumidus var. limicola Mörch

Unio tumidus var. mülleri Rossm.
+ Unio muelleri var. compressus of Authors, unknown year