Triquetra Lea, 1852
Klein, 1753, Tent. Method. Ostrac., etc.: 135. [pre-linnaean]
Lea, 1852, Synopsis Fam. Naiades: 17.
Mörch, 1853, Cat. Conch. Yoldi 2: 43.
(homonym of Blainville, 1828 [Veneridae])
Type species: Prisodon obliquus Schumacher, 1817 (herein) = Prisodon obliquus

Tritogenia Agassiz, 1852
‘Agassiz’ of Authors.
Agassiz, 1852, Arch. Naturg. 18(1): 52.
Mörch, 1853, Cat. Conch. Yoldi 2: 44.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 496.
Paetel, 1890, Cat. Conch.-Samml. 3: 143.
(error for Tritogonia Agassiz, 1852)

Legumia Agassiz, 1852
‘Swainson’ of Authors.
Agassiz, 1852, Arch. Naturg. 18(1): 45.
Mörch, 1853, Cat. Conch. Yoldi 2: 46.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 490.
Paetel, 1890, Cat. Conch.-Samml. 3: 143.
(error for Ligumia Swainson, 1840)

Danalis Mörch, 1853
Mörch, 1853, Cat. Conch. Yoldi 2: 48.
(intro'd as syn. of Baphia Mörch, 1853)

Hormomya Mörch, 1853
Mörch, 1853, Cat. Conch. Yoldi 2: ??.

Baphia Mörch, 1853
Meuschen, 1787, Mus. Gevers: 472 [as ‘Baphiæ’]. [nomen nudum]
‘Meusch. 1787’ Mörch, 1853, Cat. Conch. Yoldi 2: 48.
(homonym of Gray, 1847 [Malleidae]; intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Mya margaritifera Linnaeus, 1758 (orig. desig.) = Margaritifera margaritifera

Niaea Mörch, 1853
‘Sws. 1837’ Mörch, 1853, Cat. Conch. Yoldi 2: 47 [as ‘Niæa’].
Paetel, 1890, Cat. Conch.-Samml. 3: 143.
(error for Naia Swainson, 1840)

Anodontina Mörch, 1853
‘Schlüter’ of Authors.
Mörch, 1853, Cat. Conch. Yoldi 2: 48.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 502.
Martens, 1900, Biol. Centr.-Amer., Moll.: 481.
(homonym of Macquart, 1838 [Dipt.]; new name for Anadontina Schlüter, 1838)

Rhipidodonta Mörch, 1853
Mörch, 1853, Cat. Conch. Yoldi 2: 47.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio paranensis Lea, 1834 (monotypy) = Diplodon paranensis

Euphira Mörch, 1853
‘Gistel’ of Authors.
Mörch, 1853, Cat. Conch. Yoldi 2: 28.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 506.
Paetel, 1875, Fam. Gatt. Moll.: 79.
Westerlund, 1902, Rad. Jugoslav. Akad. 150: 137.
(error for Eufira Gistl, 1848)

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)

Unio metanever Lea, 1829
‘Rafinesque’ of Authors.
Lea, 1829, Trans. Amer. Phil. Soc. 3 [O. 1]: 418.
Jay, 1835, Cat. Rec. Shells: 17.
Hanley, 1843, Illustr. Descr. Cat. Rec. Bivalve Shells: 179.
Agassiz, 1852, Arch. Naturg. 18(1): 48.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 252.
Mörch, 1853, Cat. Conch. Yoldi 2: 44.
Lewis, 1871, Amer. J. Conch. 6: 218.
Lea, 1871, Proc. Acad. Nat. Sci. 23: 15 [as ‘Margarita (Unio) metanever’].
(reference to Obliquaria (Quadrula) metanevra Rafinesque, 1820)

Pleiodon macmurtrei Conrad, 1834
‘Conrad’ of Authors.
Conrad, 1834, Jour. Acad. Nat. Sci. 7(1): 180.
Hanley, 1843, Illustr. Descr. Cat. Rec. Bivalve Shells: 225.
Mörch, 1853, Cat. Conch. Yoldi 2: 49.
Pilsbry & Bequaert, 1927, Bull. AMNH 53: 443.
Haas, 1969, Das Tierreich 88: 601.
Mandahl-Barth, 1988, Studies on African Freshwater Bivalves: 57.
Daget, 1998, Cat. Bivalves Africains: 151.
(incorrect original spelling of Pleiodon macmurtriei Conrad, 1834)

Unio suborbiculatus Conrad, 1836
‘Hildreth’ of Authors.
Conrad, 1836, Monogr. Fam. Unionidae 1(4): 35.
Mörch, 1853, Cat. Conch. Yoldi 2: 46.
(error for Unio orbiculatus Hildreth, 1828)

Unio carolinensis Mörch, 1853
‘Bosc’ of Authors.
Mörch, 1853, Cat. Conch. Yoldi 2: 46.
Campbell & Lydeard, 2012, Amer. Malac. Bull. 30(1): 33.
(error for Unio caroliniana Bosc, 1801)

Diplodon parallelepipedum Mörch, 1853
‘Lea’ Mörch, 1853, Cat. Conch. Yoldi 2: 47.
(error for Unio parallelopipedon Lea, 1834)

Unio (Obovaria) orbicularis Mörch, 1853
Mörch, 1853, Cat. Conch. Yoldi 2: 44. [nomen nudum]

Unio (Scalenaria) scalenarius Mörch, 1853
‘Raf.’ Mörch, 1853, Cat. Conch. Yoldi 2: 44.
(error for Obliquaria (Scalenaria) scalenia Rafinesque, 1820)

Anodonta cygnea lingua Mörch, 1863
‘Yoldi’ Mörch, 1853, Cat. Conch. Yoldi 2: 48 [as ‘A. lingua’]. [nomen nudum]
‘(Yoldi)’ Mörch, 1863, Vidensk. Medd. Naturhist. Foren. Kjöben. (17-22): 83.
(intro'd as intra-sp. of Mytilus cygneus Linnaeus, 1758)

Anodonta anatina monstrosa Brot, 1867
Mörch, 1853, Cat. Conch. Yoldi 2: 48 [as ‘A. monstrosa’]. [nomen nudum]
Brot, 1867, Assoc. Zool. Léman Ann. (1866): [42,] pl. 7, fig. 2.
(intro'd as intra-sp. of Mytilus anatinus Linnaeus, 1758)

Aetheria [sic] semilunata (Lam.)
+ Etheria plumbea Férussac, 1824

Anodonta (Patularia) exotica Lam.

Anodonta (Patularia) latomarginata Lea

Anodonta anatina (L.)

Anodonta cellensis [sic] (Gm.)

Anodonta monstrosa
+ Anodonta cygnea lingua Mörch, 1863

Anodonta piscinalis Nilsson

Castalia cordata Humph.
+ Prisodon truncatus Schumacher, 1817
+ Castalia ambigua Lamarck, 1819

Mutela (Pliodon) ovata (Sws.)
+ Arca rostrum Wood, 1828
+ Pleiodon macmurtriei Conrad, 1834

Mutela (Spatha) chaiziana (Rang)

Mutela (Spatha) rubens (Lam.)

Mutela dubia (Gm.)
+ Iridina exotica Lamarck, 1819
+ Anodonta adansonii Gray, 1825

Triquetra corrugata (Lam.)

Triquetra obliqua (Sch.)
+ Hyria avicularis Lamarck, 1819

Unio (Alasmodonta (s.s.)) marginatus (Say)
+ Unio varicosa Lamarck, 1819
+ Unio rugulosus Wood, 1828

Unio (Alasmodonta Strophitus) undulatus Say
+ Unio hians Valenciennes, 1827

Unio (Anodontina) [sic] cataracta (Say)

Unio (Anodontina) [sic] undulatus (Say)
+ Unio varicosus of Authors, unknown year

Unio (Baphia) margaritifera (L.)
+ Unio elongata Lamarck, 1819

Unio (Complanaria) complanata (Barnes)
+ Unio gigas Swainson, 1824

Unio (Crenodonta) plicatus Say
+ Unio peruviana Lamarck, 1819
+ Unio undulata Valenciennes, 1827

Unio (Cyprogenia) stegaria (Raf.)
+ Unio irroratus Lea, 1828

Unio (Diplodon) parallelepipedum [sic] Lea

Unio (Dysnomia) gibbosus (Raf.)
+ Unio perplexus Lea, 1831
+ Unio obliquus Potiez & Michaud, 1844

Unio (Elliptio) abruptus Say
+ Unio cyclops Conrad, 1836

Unio (Elliptio) carolinensis [sic] Bosc
+ Unio arctatus Conrad, 1834

Unio (Elliptio) dilatatus Raf.
+ Unio nasuta Lamarck, 1819
+ Unio gibbosus Barnes, 1823

Unio (Elliptio) fasciolaris (Raf.)
+ Unio phaseolus Hildreth, 1828
+ Unio planulatus Lea, 1829

Unio (Elliptio) lanceolatus Lea

Unio (Elliptio) ligamentinus Lam.
+ Unio crassus Say, 1817
+ Unio crassidens Lamarck, 1819
+ Unio ellipticus Barnes, 1823
+ Unio orbiculatus Hildreth, 1828

Unio (Elliptio) maculatus Conrad

Unio (Elliptio) nasutus Say
+ Unio rostrata Valenciennes, 1827

Unio (Elliptio) niger Raf.
+ Unio violaceus Spengler, 1793
+ Unio crassidens Lamarck, 1819
+ Unio cuneatus Barnes, 1823

Unio (Elliptio) purpureus Say
+ Mya complanata Lightfoot, 1786
+ Unio purpurascens Lamarck, 1819

Unio (Elliptio) teres Raf.
+ Unio anodontoides Lea, 1831

Unio (Hyridella) australis Lam.

Unio (Lampsilis) cariosus Say
+ Unio ventricosus Barnes, 1823
+ Unio ovata Valenciennes, 1827

Unio (Lampsilis) ochraceus Say

Unio (Lampsilis) ovatus Say

Unio (Lampsilis) siliquoideus Barnes

Unio (Lampsilis) virginianus Lam.
+ Mya anatina Gronovius, 1781
+ Mya radiata Gmelin, 1791
+ Unio oblongatus Wood, 1828

Unio (Metaptera) latissimus Raf.
+ Unio poulsoni Conrad, 1834

Unio (Metaptera) megapterus (Raf.)
+ Unio alatus Say, 1817

Unio (Mysca) pictorum (L.)

Unio (Mysca) tumidus Retz.

Unio (Naïa) aegyptiacus Caillaud [sic]

Unio (Naïa) corrugatus (Müll.)

Unio (Naïa) spurius (Gm.)

Unio (Naïa) testudinarius Spgl.

Unio (Niæa) araucanus Philippi

Unio (Niæa) auratus Sws.

Unio (Niæa) chilensis Gray

Unio (Niæa) multistriatus Lea
+ Diplodon ellypticum Wagner, 1827
+ Unio psammactinus Philippi, 1848

Unio (Niæa) niloticus Caillaud [sic]

Unio (Obovaria) circulus Lea

Unio (Obovaria) coccineus Hildr. apud Lea
+ Unio catillus Conrad, 1836

Unio (Obovaria) mytiloides (Raf.)
+ Unio pyramidatus Lea, 1831

Unio (Obovaria) rotundatus Lam.
+ Unio rotundatus Wood, 1828

Unio (Obovaria) torsus (Raf.)
+ Unio retusa Lamarck, 1819

Unio (Obovaria) “orbicularis”

Unio (Orthonymus) cylindricus Say
+ Unio naviformis Lamarck, 1819

Unio (Potamida) [sic] crassus Retz.
+ Unio consentaneus Rossmässler, 1836

Unio (Potamida) [sic] fellmanni Dh.

Unio (Potamida) [sic] littoralis Lam.
+ Unio rhomboideus Moquin-Tandon, 1855

Unio (Potamida) [sic] reniformis Schmidt

Unio (Quadrula) asper Lea

Unio (Quadrula) metanever [sic] (Raf.)

Unio (Quadrula) nodosus Barnes

Unio (Quadrula) pustulosus Lea

Unio (Quadrula) turgidus Lea

Unio (Rhipidodonta) paranensis var. Lea

Unio (Rotundaria) cælatus Conrad

Unio (Scalenaria) scalenarius [sic] (Raf.)

Unio (Tritogenia) [sic] verrucosus (Raf.)
+ Unio tuberculatus Barnes, 1823
+ Unio (Theliderma) pustulata Swainson, 1840

Unio (Truncilla) triqueter (Raf.)
+ Unio triangularis Barnes, 1823
+ Unio formosus Lea, 1831