Acella micronema White, 1886 † accepted as Pleurolimnaea tenuicosta (Meek & Hayden, 1856) † (source of synonymy)
Acroloxus radiatulus Whiteaves, 1885 † accepted as Pseudancylus radiatulus (Whiteaves, 1885) † (additional source)
Amnicola adesta Dall, 1915 † (basis of record)
Amnicola cretacea Stanton, 1899 † accepted as Lioplacodes cretaceus (Stanton, 1899) † (basis of record)
Amnicola expansilabris Aldrich, 1911 † (basis of record)
Amnicola galbana Haldeman, 1845 † (basis of record)
Amnicola omphalotropis Pilsbry in Dall, 1892 † (basis of record)
Amnicola puteana Pilsbry, 1935 † accepted as Pyrgulopsis puteana (Pilsbry, 1935) † (basis of record)
Amnicola yatesiana Cooper, 1894 † accepted as Pyrgulopsis yatesiana (Cooper, 1894) † (basis of record)
Ampullaria powelli Walcott, 1883 † accepted as Reesidella powelli (Walcott, 1883) † (basis of record)
Aphanotylus whitei Dall, 1924 † (basis of record)
Aplexa atava (White, 1877) † (basis of record)
Aplexa disjuncta (White, 1879) † (basis of record)
Aplexa subelongata (Meek & Hayden, 1856) † (basis of record)
Bithynia arundelensis Clark, 1911 † (basis of record)
Brannerillus involutus praeposterus Pilsbry, 1934 † accepted as Brannerillus physispira Hannibal, 1912 † (basis of record)
Brannerillus involutus thremma Pilsbry, 1935 † accepted as Brannerillus physispira Hannibal, 1912 † (basis of record)
Brannerillus physispira Hannibal, 1912 † (basis of record)
Calipyrgula carinifer Pilsbry, 1934 † (basis of record)
Calipyrgula ellipsostoma Pilsbry, 1934 † (basis of record)
Calipyrgula stewartiana Pilsbry, 1935 † (basis of record)
Campeloma amarillensis Stanton, 1916 † accepted as Campeloma amarillense Stanton, 1916 † (basis of record)
Campeloma calamodontis Cockerell, 1915 † accepted as Viviparus calamodontis (Cockerell, 1915) † (basis of record)
Campeloma harlowtonensis Stanton, 1903 † accepted as Campeloma harlowtonense Stanton, 1903 † (basis of record)
Campeloma macrospirum (Meek, 1871) † (basis of record)
Campeloma multistriatum (Meek & Hayden, 1856) † (basis of record)
Carinifex malheurensis Henderson & Rodeck, 1934 † accepted as Helisoma malheurense (Henderson & Rodeck, 1934) † (basis of record)
Carinifex marshalli Arnold, 1909 † accepted as Helisoma marshalli (Arnold, 1909) † (basis of record)
Carinifex sanctaeclarae Hannibal, 1909 † accepted as Helisoma sanctaeclarae (Hannibal, 1909) † (additional source)
Cassiopella turricula (White, 1876) † (basis of record)
Cerithidea nebrascensis (Meek & Hayden, 1856) † (basis of record)
Cerithiopsis burkevillensis Dall, 1913 † (basis of record)
Charydrobia stachei White, 1895 † accepted as Lioplacodes stachei (White, 1895) † (basis of record)
Ferrissia actinophora (White, 1886) † (basis of record)
Fluminicola percarinata Pilsbry, 1934 † (basis of record)
Fluminicola perditicollis Pilsbry, 1934 † (basis of record)
Fluminicola pilula Pilsbry, 1934 † accepted as Pyrgulopsis pilula (Pilsbry, 1934) † (basis of record)
Fluminicola siegfusi Pilsbry, 1934 † (basis of record)
Fluminicola spiralis Pilsbry, 1934 † (basis of record)
Fluminicola williamsi (Hannibal, 1912) † (basis of record)
Goniobasis arnoldiana Pilsbry, 1934 † accepted as Juga arnoldiana (Pilsbry, 1934) † (basis of record)
Goniobasis chrysaloidea White, 1876 † accepted as Pachychiloides chrysaloidea (White, 1876) † (additional source)
Goniobasis cleburni White, 1876 † accepted as Pachychiloides cleburni (White, 1876) † (additional source)
Goniobasis convexa (Meek & Hayden, 1856) † (basis of record)
Goniobasis diegoensis M. Hanna, 1927 † (basis of record)
Goniobasis filifera White, 1886 † (basis of record)
Goniobasis furuhjelmi (C. Mayer, 1869) † (basis of record)
Goniobasis gracilenta Meek, 1876 † (basis of record)
Goniobasis hannibali Weaver & Palmer, 1922 † (additional source)
Goniobasis increbescens Stanton, 1899 † (basis of record)
Goniobasis insculpta Meek, 1873 † accepted as Pachymelania insculpta (Meek, 1873) † (additional source)
Goniobasis invenusta (Meek & Hayden, 1857) † (basis of record)
Goniobasis jeffersonensis White, 1895 † (basis of record)
Goniobasis judithensis Stanton & Hatcher, 1905 † accepted as Lioplacodes judithensis (Stanton & Hatcher, 1905) † (basis of record)
Goniobasis macilenta White, 1883 † accepted as Pachychiloides macilenta (White, 1883) † (basis of record)
Goniobasis marylandica Martin, 1904 † (basis of record)
Goniobasis multicarinata Russell, 1932 † (basis of record)
Goniobasis olequaensis (Arnold & Hannibal in Hannibal, 1912) † (basis of record)
Goniobasis olequahensis Weaver & Palmer, 1922 † (basis of record)
Goniobasis omitta (Meek & Hayden, 1857) † (basis of record)
Goniobasis ortmanni Stanton, 1903 † accepted as Circamelania ortmanni (Stanton, 1903) † (basis of record)
Goniobasis pealei Stanton, 1899 † (basis of record)
Goniobasis rodeoensis (Clark, 1915) † (basis of record)
Goniobasis sanctamariensis Russell, 1932 † accepted as Lioplacodes sanctamariensis (Russell, 1932) † (basis of record)
Goniobasis silberlingi Stanton, 1903 † accepted as Stantonogyra silberlingi (Stanton, 1903) † (basis of record)
Goniobasis sookensis Clark & Arnold, 1923 † (basis of record)
Goniobasis sublaevus (Meek & Hayden, 1857) † (basis of record)
Goniobasis subsculptilis (Meek, 1870) † (basis of record)
Goniobasis subtortuosa (Meek & Hayden, 1857) † (basis of record)
Goniobasis taylori var. calkinsi Dall, 1924 † accepted as Goniobasis taylori (Gabb, 1866) † (basis of record)
Goniobasis tenuicarinata (Meek & Hayden, 1858) † accepted as Lioplacodes tenuicarinata (Meek & Hayden, 1857) † (basis of record)
Goniobasis tenuicarinata var. whiteavesi Russell, 1929 † accepted as Lioplacodes whiteavesi (Russell, 1929) † (additional source)
Goniobasis trigemmata (Conrad, 1860) † (basis of record)
Goniobasis ursarivulensis Russell, 1934 † (basis of record)
Goniobasis veatchii (Gabb, 1864) † (basis of record)
Goniobasis weldensis Henderson, 1934 † (basis of record)
Hydrobia aldrichi (Dall, 1913) † (basis of record)
Hydrobia amnicoloides Pilsbry in Dall, 1892 † (basis of record)
Hydrobia anthonyi (Meek & Hayden, 1856) † (basis of record)
Hydrobia birkhauseri Pilsbry, 1935 † (basis of record)
Hydrobia curva (Dall, 1913) † (basis of record)
Hydrobia eulimoides Meek, 1876 † accepted as Goniobasis eulimoides (Meek, 1876) † (basis of record)
Hydrobia georgiensis (Aldrich, 1911) † (basis of record)
Hydrobia milium (Dall, 1913) † (basis of record)
Hydrobia mobiliana Dall, 1892 † (basis of record)
Hydrobia occulta White, 1895 † accepted as Parateinostoma occultum (White, 1895) † (basis of record)
Hydrobia olssoni (Smith, 1923) † (basis of record)
Hydrobia plana (Aldrich, 1911) † (basis of record)
Hydrobia pontis Weaver & Palmer, 1922 † (basis of record)
Hydrobia recta White, 1876 † (basis of record)
Hydrobia satillensis (Aldrich, 1911) † (additional source)
Hydrobia subconica Meek, 1876 † (basis of record)
Hydrobia subcylindracea Whiteaves, 1885 † (basis of record)
Hydrobia umbilicata Pilsbry in Dall, 1892 † (basis of record)
Hydrobia utahensis White, 1876 † (basis of record)
Isapis obsoleta Dall, 1913 † (basis of record)
Lanx moribundus G.D. Hanna, 1922 † (basis of record)
Limnaea (Leptolimnea) minuscula White, 1880 † accepted as Lymnaea minuscula White, 1880 † (status source)
Limnaea accelerata White, 1886 † accepted as Mesauriculstra accelerata (White, 1886) † (basis of record)
Lioplacodes bituminis Russell, 1932 † (basis of record)