Herringtonium Clarke, 1973
Clarke, 1973, Malacologia 13(1-2): 148.
(intro'd as sub-gen. of Sphaerium Scopoli, 1777)
Type species: Cyclas occidentale Lewis, 1856 (orig. desig.) = Sphaerium occidentale

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)

Amblema plicata (Say, 1816)
+ Amblema costata Rafinesque, 1820
+ Unio hippopoeus Lea, 1845

Anodonta grandis grandis Say, 1829
+ Anodonta dallasiana Lea, 1863

Anodonta grandis simpsoniana Lea, 1861
+ Anodonta kennicottii Lea, 1861
+ Anodonta marginata Baker, 1920

Anodonta kennerlyi Lea, 1860

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

Elliptio complanata (Solander, 1786)

Fusconaia flava (Rafinesque, 1820)
+ Unio undatus Barnes, 1823
+ Unio rubiginosus Lea, 1829
+ Unio trigonus Lea, 1831
+ Fusconaia flava var. parvula Grier, 1918
+ Fusconaia undata wagneri F.C. Baker, 1928

Lampsilis ovatus (Say, 1817)
+ Lampsilis cardium Rafinesque, 1820
+ Unio ventricosus Barnes, 1823
+ Unio occidens Lea, 1829
+ Unio canadensis Lea, 1857
+ Lampsilis (s.s.) ventricosa var. lurida Simpson, 1914
+ Lampsilis ventricosa perglobosa F.C. Baker, 1928
+ Lampsilis ventricosa winnebagoensis F.C. Baker, 1928

Lampsilis radiata radiata (Gmelin, 1791)
+ Unio luteola Lamarck, 1819

Lampsilis radiata siliquoidea (Barnes, 1823)
+ Unio superiorensis Marsh, 1897

Lasmigona complanata (Barnes, 1823)
+ Unio katherinae Lea, 1838

Lasmigona compressa (Lea, 1829)
+ Lasmigona viridis Rafinesque, 1831
+ Unio compressus var. plebius C.B. Adams, 1842

Lasmigona costata (Rafinesque, 1820)
+ Lasmigona costata var. ereganensis Grier, 1918
+ Lasmigona costata pepinensis F.C. Baker, 1928
+ Lasmigona costata nuda F.C. Baker, 1928

Ligumia recta (Lamarck, 1819)
+ Unio (Eurynia) latissima Rafinesque, 1820

Pisidium (Cyclocalyx) adamsi Prime, 1852
+ Cyclas nitida Mighels & Adams, 1842

Pisidium (Cyclocalyx) casertanum (Poli, 1791)
+ Cyclas (Pisidium) abditum Haldeman, 1841

Pisidium (Cyclocalyx) compressum Prime, 1852

Pisidium (Cyclocalyx) equilaterale Prime, 1852
+ Pisidium aequilaterale Prime, 1865

Pisidium (Cyclocalyx) fallax Sterki, 1890 [sic]

Pisidium (Cyclocalyx) ferrugineum Prime, 1852

Pisidium (Cyclocalyx) lilljeborgi (s. str.) Clessin in Esmark & Hoyer, 1886

Pisidium (Cyclocalyx) lilljeborgi form cristatum Sterki, 1928

Pisidium (Cyclocalyx) milium Held, 1836

Pisidium (Cyclocalyx) nitidum Jenyns, 1832
+ Pisidium contortum Prime, 1858
+ Pisidium pauperculum Sterki, 1896

Pisidium (Cyclocalyx) obtusale (Lamarck, 1818)
+ Pisidium obtusale Pfeiffer, 1821
+ Pisidium scholtzii Clessin, 1873

Pisidium (Cyclocalyx) subtruncatum Malm, 1855

Pisidium (Cyclocalyx) variabile Prime, 1852

Pisidium (Cyclocalyx) ventricosum Prime, 1851
+ Pisidium obtusale Pfeiffer, 1821

Pisidium (Cyclocalyx) ventricosum form rotundatum Prime, 1852

Pisidium (Cyclocalyx) walkeri (s. str.) Sterki, 1895

Pisidium (Cyclocalyx) walkeri form mainense Sterki, 1898

Pisidium (Neopisidium) conventus Clessin, 1877

Pisidium (Neopisidium) punctatum Sterki, 1895

Pisidium (s.s.) idahoense Roper, 1890

Proptera alata (Say, 1817)
+ Metaptera megaptera Rafinesque, 1820

Quadrula quadrula (Rafinesque, 1820)
+ Quadrula (Quadrula) quadrula bullocki F.C. Baker, 1928

Sphaerium (Herringtonium) occidentale (Prime in Lewis, 1856)
+ Cyclas ovalis Prime, 1853

Sphaerium (Musculium) lacustre (Müller, 1774)
+ Cyclas ryckholti Normand, 1844
+ Cyclas jayensis Prime, 1852
+ Musculium winkleyi Sterki, 1909

Sphaerium (Musculium) partumeium (Say, 1822)
+ Cyclas truncata Linsley, 1845

Sphaerium (Musculium) securis (Prime, 1851)
+ Cyclas sphaerica Prime, 1853

Sphaerium (Musculium) transversum (Say, 1829)

Sphaerium (s.s.) nitidum Clessin in Westerlund, 1876
+ Sphaerium tenue Mozley, 1938

Sphaerium (s.s.) rhomboideum (Say, 1822)

Sphaerium (s.s.) simile (Say, 1816)
+ Cyclas sulcata Lamarck, 1818

Sphaerium (s.s.) striatinum (Lamarck, 1818)
+ Cyclas triangularis Say, 1829
+ Cyclas solidula Prime, 1852

Strophitus undulatus (Say, 1817)
+ Anodonta pensylvanica Lamarck, 1819
+ Anodon rugosus Swainson, 1822
+ Alasmodonta edentula Say, 1829
+ Anodonta pavonia Lea, 1838
+ Strophitus rugosus pepinensis F.C. Baker, 1928
+ Strophitus rugosus winnebagoensis F.C. Baker, 1928
+ Strophitus rugosus lacustris F.C. Baker, 1928