Actinonaias didymictidis (T. D. A. Cockerell, 1915) † (basis of record)
Actinonaias shoshonensis (C. A. White, 1876) † (basis of record)
Amblema baueri (Stanton, 1916) † accepted as Unio baueri Stanton, 1916 † (basis of record)
Amblema cretacollis (Maury, 1902) † (basis of record)
Amblema goniambonatus (C. A. White, 1878) † (basis of record)
Amblema gonionotus (C. A. White, 1876) † (basis of record)
Amblema nebrascensis (Meek, 1871) † (basis of record)
Amblema reesidei (Stanton, 1916) † (basis of record)
Amblema trigoniaformis (Maury, 1902) † (basis of record)
Anodonta arnoldi C. E. Weaver & K. van W. Palmer, 1922 † (additional source)
Anodonta athlios (Mayer, 1869) † (additional source)
Anodonta kettlemanensis Arnold, 1909 † (additional source)
Anodonta malheurensis J. Henderson & Rodeck, 1934 † accepted as Gonidea malheurensis (J. Henderson & Rodeck, 1934) † (additional source)
Anodontites argillensis (L. S. Russell, 1932) † (basis of record)
Antediplodon borealis (Pilsbry, 1921) † (basis of record)
Antediplodon carolussimpsoni (Pilsbry, 1921) † (basis of record)
Antediplodon dockumensis (C. T. Simpson, 1896) † (additional source)
Antediplodon dumblei (C. T. Simpson, 1896) † (additional source)
Antediplodon graciliratus (C. T. Simpson, 1896) † (additional source)
Antediplodon gregoryi (Reeside, 1927) † (basis of record)
Antediplodon pennsylvanicus (Pilsbry, 1921) † (basis of record)
Antediplodon yorkensis (Pilsbry, 1921) † (basis of record)
Arkansia macneili Modell, 1957 † accepted as Arcidens macneili (Modell, 1957) † (original description)
Callonaia subtrigonalis (Whitfield, 1907) † (basis of record)
Costanaia arciformis MacNeil, 1935 † (additional source)
Elliptio albertensis (Whiteaves, 1885) † (basis of record)
Elliptio clinopisthus (C. A. White, 1882) † (basis of record)
Elliptio eomargaron (T. D. A. Cockerell, 1915) † (basis of record)
Elliptio haydeni (Meek, 1860) † (basis of record)
Elliptio salissiensis L. S. Russell, 1952 † (additional source)
Elliptio washakiensis (Meek, 1871) † (basis of record)
Glebula nucalis (Meek & Hayden, 1858) † (basis of record)
Gonidea coalingensis Arnold, 1909 † (additional source)
Gonidea coalingensis var. cooperi Arnold, 1909 † accepted as Gonidea coalingensis Arnold, 1909 † (source of synonymy)
Gonidea hemphilli Hannibal, 1912 † (additional source)
Lampsilis brimhallensis (Stanton, 1916) † (basis of record)
Lampsilis grangeri (T. D. A. Cockerell, 1915) † (basis of record)
Lampsilis marshalli MacNeil, 1935 † accepted as Potamilus marshalli (MacNeil, 1935) † (basis of record)
Lampsilis sandersoni (Warren, 1926) † (additional source)
Lampsilis sandrius (Dall, 1913) † (basis of record)
Lampsilis toxonotus (C. A. White, 1886) † (basis of record)
Ligumia barbouri (C. A. White, 1895) † (basis of record)
Ligumia bowlingi (MacNeil, 1935) † (basis of record)
Ligumia couesi (C. A. White, 1877) † (basis of record)
Ligumia tellinoides (J. Hall, 1845) † (basis of record)
Ligumia whitei (J. Henderson, 1918) † (basis of record)
Margaritifera endlichi (C. A. White, 1877) † (basis of record)
Medionidus lapilloides (C. A. White, 1886) † (basis of record)
Plesielliptio abbreviatus (Stanton & Hatcher, 1905) † (additional source)
Plesielliptio priscus (Meek & Hayden, 1856) † (additional source)
Pleurobema alixus (Dall, 1913) † (basis of record)
Pleuronaia neomexicana (Stanton, 1916) † (basis of record)
Pliconaias popenoei W. B. Marshall, 1929 † (additional source)
Protamblema Modell, 1957 † (original description)
Protamblema belliplicata (Meek, 1871) † (basis of record)
Protamblema belliplicata macneili Modell, 1957 † accepted as Protamblema macneili Modell, 1957 † (original description)
Protelliptio L. S. Russell, 1934 † (basis of record)
Strophitus johnseni (L. S. Russell, 1935) † (basis of record)
Strophitus macconnelli (L. S. Russell, 1932) † (basis of record)
Tritogonia natosini (McLearn, 1929) † (basis of record)
Venustaconcha dewittensis (W. B. Marshall, 1929) † (basis of record)
Venustaconcha iridoides (C. A. White, 1886) † accepted as Antediplodon iridoides (C. A. White, 1886) † (basis of record)
Vetulonaia mayoworthensis C. C. Branson, 1935 † (additional source)