| Scientific Name | Author | English Name |
|---|---|---|
| Ventrosia maritima | (Milaschewitsch, 1916) | |
| Tryonia variegata | Hershler & Sada, 1987 | Amargosa tryonia |
| Tryonia rowlandsi | Hershler, 1989 | Grapevine springs squat tryonia |
| Tryonia salina | Hershler, 1989 | Cottonball marsh tryonia |
| Tryonia quitobaquitae | Hershler, 1988 | Quitobaquito tryonia |
| Tryonia robusta | Hershler, 1989 | Robust tryonia |
| Tryonia protea | (Gould, 1855) | Desert tryonia |
| Tryonia margae | Hershler, 1989 | Grapevine springs elongate tryonia |
| Tryonia kosteri | Taylor, 1987 | Sago tryonia |
| Tryonia ericae | Hershler & Sada, 1987 | Minute tryonia |
| Tryonia gilae | Taylor, 1987 | Gila tryonia |
| Tryonia imitator | (Pilsbry, 1899) | Mimic tryonia |
| Tryonia elata | Hershler & Sada, 1987 | Point of rocks tryonia |
| Tryonia cheatumi | (Pilsbry, 1935) | Phantom tryonia |
| Tryonia clathrata | Stimpson, 1865 | Grated tryonia |
| Tryonia diaboli | (Pilsbry & Ferriss, 1906) | Devil tryonia |
| Tryonia alamosae | Taylor, 1987 | Caliente tryonia |
| Tryonia angulata | Hershler & Sada, 1987 | Sportinggoods tryonia |
| Tryonia brevissima | (Pilsbry, 1890) | Regal hydrobe |
| Tryonia aequicostata | (Pilsbry, 1889) | Smooth-rib hydrobe |
| Tryonia adamantina | Taylor, 1987 | Diamond tryonia |
| Texadina sphinctostoma | (Abbott & Ladd, 1951) | Narrowmouth hydrobe |
| Texapyrgus longleyi | Thompson & Hershler, 1991 | Striated hydrobe |
| Texadina barretti | (Morrison, 1965) | Boone hydrobe |
| Taylorconcha serpenticola | Hershler, et al., 1994 | Bliss rapids snail |
| Stygopyrgus bartonensis | Hershler & Longley, 1986 | Barton cavesnail |
| Stiobia nana | Thompson, 1978 | Sculpin snail |
| Spurwinkia salsa | (Pilsbry, 1905) | Saltmarsh hydrobe |
| Spilochlamys turgida | Thompson, 1969 | Pumpkin siltsnail |
| Spilochlamys conica | Thompson, 1968 | Conical siltsnail |
| Spilochlamys gravis | Thompson, 1968 | Armored siltsnail |
| Somatogyrus wheeleri | Walker, 1915 | Channelled pebblesnail |
| Somatogyrus walkerianus | Aldrich, 1905 | Gulf coast pebblesnail |
| Somatogyrus virginicus | Walker, 1904 | Panhandle pebblesnail |
| Somatogyrus tennesseensis | Walker, 1906 | Opaque pebblesnail |
| Somatogyrus tryoni | Pilsbry & Baker, 1927 | Coldwater pebblesnail |
| Somatogyrus substriatus | Walker, 1906 | Choctaw pebblesnail |
| Somatogyrus tenax | Thompson, 1969 | Savannah pebblesnail |
| Somatogyrus sargenti | Pilsbry, 1895 | Mud pebblesnail |
| Somatogyrus strengi | Pilsbry & Walker, 1906 | Rolling pebblesnail |
| Somatogyrus rosewateri | Gordon, 1986 | Elk pebblesnail |
| Somatogyrus rheophilas | Thompson, 1984 | Flint pebblesnail |
| Somatogyrus quadratus | Walker, 1906 | Quadrate pebblesnail |
| Somatogyrus pygmaeus | Walker, 1909 | Pygmy pebblesnail |
| Somatogyrus pumilus | (Conrad, 1834) | Compact pebblesnail |
| Somatogyrus pilsbryanus | Walker, 1904 | Tallapoosa pebblesnail |
| Somatogyrus pennsylvanicus | Walker, 1904 | Shale pebblesnail |
| Somatogyrus parvulus | Tryon, 1865 | Sparrow pebblesnail |
| Somatogyrus obtusus | Walker, 1904 | Moon pebblesnail |
| Somatogyrus integra | (Say, 1829) | Ohio pebblesnail |
| Somatogyrus nanus | Walker, 1904 | Dwarf pebblesnail |
| Somatogyrus humerosus | Walker, 1906 | Atlas pebblesnail |
| Somatogyrus hinkleyi | Walker, 1904 | Granite pebblesnail |
| Somatogyrus georgianus | Walker, 1904 | Cherokee pebblesnail |
| Somatogyrus hendersoni | Walker, 1909 | Fluted pebblesnail |
| Somatogyrus excavatus | Walker, 1906 | Ovate pebblesnail |
| Somatogyrus depressus | (Tryon, 1862) | Sandbar pebblesnail |
| Somatogyrus decipiens | Walker, 1909 | Hidden pebblesnail |
| Somatogyrus currierianus | (Lea, 1863) | Tennessee pebblesnail |
| Somatogyrus crassus | Walker, 1904 | Stocky pebblesnail |
| Somatogyrus constrictus | Walker, 1904 | Knotty pebblesnail |
| Somatogyrus coosaensis | Walker, 1904 | Coosa pebblesnail |
| Somatogyrus crassilabris | Walker, 1915 | Thick-lip pebblesnail |
| Somatogyrus biangulatus | Walker, 1906 | Angular pebblesnail |
| Somatogyrus amnicoloides | Walker, 1915 | Ouachita pebblesnail |
| Somatogyrus aureus | Tryon, 1865 | Golden pebblesnail |
| Somatogyrus alcoviensis | Krieger, 1972 | Reverse pebblesnail |
| Rhapinema dacryon | Thompson, 1970 | Teardrop snail |
| Pyrgulopsis ventricosa | Hershler, 1995 | Clear Lake pyrg |
| Pyrgulopsis thompsoni | Hershler, 1988 | Huachuca springsnail |
| Pyrgulopsis trivialis | (Taylor, 1987) | Black River springsnail |
| Pyrgulopsis thermalis | (Taylor, 1987) | New Mexico hot springsnail |
| Pyrgulopsis taylori | Hershler, 1995 | San Luis obispo pyrg |
| Pyrgulopsis stearnsiana | (Pilsbry, 1899) | Yaqui springsnail |
| Pyrgulopsis sola | Hershler, 1988 | Brown springsnail |
| Pyrgulopsis simplex | Hershler, 1988 | Fossil springsnail |
| Pyrgulopsis robusta | (Walker, 1908) | Jackson Lake springsnail |
| Pyrgulopsis scalariformis | (Wolf, 1869) | Moss pyrg |
| Pyrgulopsis roswellensis | (Taylor, 1987) | Roswell springsnail |
| Pyrgulopsis pisteri | Hershler & Sada, 1987 | Median-gland springsnail |
| Pyrgulopsis pecosensis | (Taylor, 1987) | Pecos springsnail |
| Pyrgulopsis perturbata | Hershler, 1989 | Fish slough springsnail |
| Pyrgulopsis pilsbryana | (Baily & Baily, 1952) | Bear Lake springsnail |
| Pyrgulopsis pachyta | (Thompson, 1977) | Armored marstonia |
| Pyrgulopsis ozarkensis | Hinkley, 1915 | Ozark pyrg |
| Pyrgulopsis olivacea | (Pilsbry, 1895) | Olive marstonia |
| Pyrgulopsis owensensis | Hershler, 1989 | Owens valley springsnail |
| Pyrgulopsis ogmorhaphe | (Thompson, 1977) | Royal springsnail |
| Pyrgulopsis nevadensis | (Stearns, 1883) | Corded pyrg |
| Pyrgulopsis neomexicana | (Pilsbry, 1916) | Socorro springsnail |
| Pyrgulopsis montezumensis | Hershler, 1988 | Montezuma well springsnail |
| Pyrgulopsis morrisoni | Hershler, 1988 | Page springsnail |
| Pyrgulopsis nanus | Hershler & Sada, 1987 | Distal-gland springsnail |
| Pyrgulopsis micrococcus | (Pilsbry, 1893) | Oasis valley springsnail |
| Pyrgulopsis metcalfi | (Taylor, 1987) | Naegele springsnail |
| Pyrgulopsis lustrica | (Pilsbry, 1890) | Boreal marstonia |
| Pyrgulopsis merriami | (Pilsbry & Beecher, 1892) | Pahranagat pebblesnail |
| Pyrgulopsis letsoni | (Walker, 1901) | Gravel pyrg |
| Pyrgulopsis longae | Hershler, 1995 | Long valley pyrg |
| Pyrgulopsis kolobensis | (Taylor, 1987) | Toqueville springsnail |
| Pyrgulopsis isolata | Hershler & Sada, 1987 | Elongate-gland springsnail |
| Pyrgulopsis intermedia | (Tryon, 1865) | Crooked creek springsnail |
| Pyrgulopsis idahoensis | (Pilsbry, 1933) | Idaho springsnail |
| Pyrgulopsis hershleri | Thompson, 1995 | Coosa pyrg |
| Pyrgulopsis hendersoni | (Pilsbry, 1933) | Harney lake springsnail |
| Pyrgulopsis halcyon | (Thompson, 1977) | Halcyon marstonia |
| Pyrgulopsis greggi | Hershler, 1995 | Kern river pyrg |
| Pyrgulopsis giuliani | Hershler & Pratt, 1990 | Southern sierra nevada springsnail |
| Pyrgulopsis glandulosa | Hershler, 1988 | Verde rim springsnail |
| Pyrgulopsis gilae | (Taylor, 1987) | Gila springsnail |
| Pyrgulopsis gibba | Hershler, 1995 | Surprise valley pyrg |
| Pyrgulopsis fairbanksensis | Hershler & Sada, 1987 | Fairbanks springsnail |
| Pyrgulopsis erythropoma | (Pilsbry, 1899) | Ash meadows pebblesnail |
| Pyrgulopsis eremica | Hershler, 1995 | Smoke creek pyrg |
| Pyrgulopsis deserta | (Pilsbry, 1916) | Desert springsnail |
| Pyrgulopsis diablensis | Hershler, 1995 | Diablo range pyrg |
| Pyrgulopsis davisi | (Taylor, 1987) | Limpia creek springsnail |
| Pyrgulopsis conica | Hershler, 1988 | Kingman springsnail |
| Pyrgulopsis crystalis | Hershler & Sada, 1987 | Crystal springsnail |
| Pyrgulopsis californiensis | (Gregg & Taylor, 1965) | Laguna mountain springsnail |
| Pyrgulopsis castor | (Thompson, 1977) | Beaverpond marstonia |
| Pyrgulopsis chupaderae | (Taylor, 1987) | Chupadera springsnail |
| Pyrgulopsis bryantwalkeri | Hershler, 1994 | Cortez hills pebblesnail |
| Pyrgulopsis bernardina | (Taylor, 1987) | San Bernardino springsnail |
| Pyrgulopsis bruneauensis | Hershler, 1990 | Bruneau hot springsnail |
| Pyrgulopsis bacchus | Hershler, 1988 | Grand wash springsnail |
| Pyrgulopsis arizonae | (Taylor, 1987) | Apache springsnail |
| Pyrgulopsis avernalis | (Pilsbry, 1935) | Moapa pebblesnail |
| Pyrgulopsis amargosae | Hershler, 1989 | Amargosa springsnail |
| Pyrgulopsis arga | (Thompson, 1977) | Ghost marstonia |
| Pyrgulopsis agarhecta | (Thompson, 1969) | Ocmulgee marstonia |
| Pyrgulopsis aardahli | Hershler, 1989 | Benton valley springsnail |
| Pyrgophorus spinosus | (Call & Pilsbry, 1886) | Spiny crownsnail |
| Pyrgophorus platyrachis | Thompson, 1968 | Serrate crownsnail |
| Pyrgophorus parvulus | (Guilding, 1828) | |
| Pyrgophorus cisterninus | (Küster, 1852) | |
| Pyrgophorus coronatus | (Pfeiffer, 1840) | |
| Pristinicola hemphilli | (Pilsbry, 1890) | Pristine pyrg |
| Probythinella protera | Pilsbry, 1953 | |
| Probythinella emarginata | (Kuster, 1852) | Delta hydrobe |
| Potamopyrgus estuarinus | Winterbourn, 1970 | |
| Potamopyrgus kaitunuparaoa | Haase, 2008 | |
| Potamopyrgus ciliatus | (Gould, 1850) | |
| Potamopyrgus antipodarum | (Gray, 1853) | New Zealand mudsnail |
| Phreatodrobia rotunda | Hershler & Longley, 1986 | Beaked cavesnail |
| Phreatodrobia plana | Hershler & Longley, 1986 | Disc cavesnail |
| Phreatodrobia punctata | Hershler & Longley, 1986 | High-hat cavesnail |
| Phreatodrobia nugax | (Pilsbry & Ferriss, 1906) | Domed cavesnail |
| Phreatodrobia imitata | Hershler & Longley, 1986 | Mimic cavesnail |
| Phreatodrobia micra | (Pilsbry & Ferriss, 1906) | Flattened cavesnail |
| Phreatoceras taylori | (Hershler & Longley, 1986) | Nymph trumpet |
| Phreatodrobia conica | Hershler & Longley, 1986 | Hueco cavesnail |
| Peringia ulvae | (Pennant, 1777) | Laver spire shell |
| Onobops jacksoni | (Bartsch, 1953) | Fine-lined hydrobe |
| Onobops crassus | (Thompson, 1968) | Spartina hydrobe |
| Notogillia sathon | Thompson, 1969 | Satyr siltsnail |
| Notogillia wetherbyi | (Dall, 1885) | Alligator siltsnail |
| Lyogyrus walkeri | (Pilsbry, 1898) | Canadian duskysnail |
| Lyogyrus retromargo | (Thompson, 1968) | Indented duskysnail |
| Lyogyrus pupoideus | (Gould, 1841) | Pupa duskysnail |
| Lyogyrus latus | Thompson & Hershler, 1991 | Cobble sprite |
| Lyogyrus pilsbryi | (Walker, 1906) | Lake duskysnail |
| Lyogyrus greggi | (Pilsbry, 1935) | Rocky mountain duskysnail |
| Lyogyrus granum | (Say, 1822) | Squat duskysnail |
| Lyogyrus browni | (Carpenter, 1872) | Slender duskysnail |
| Littoridinops tenuipes | (Couper, 1844) | Henscomb hydrobe |
| Littoridinops palustris | Thompson, 1968 | Bantam hydrobe |
| Littoridinops monroensis | (Frauenfeld, 1863) | Cockscomb hydrobe |
| Littoridina lioneli | Preston, 1915 | |
| Littoridina limosa | Preston, 1915 | |
| Littoridina faminensis | Preston, 1915 | |
| Littoridina angustiarum | Preston, 1915 | |
| Lepyrium showalteri | (Lea, 1861) | Flat pebblesnail |
| Laevicaspia caspia | (Eichwald, 1838) | |
| Hydrobia totteni | Morrison, 1954 | |
| Hydrobia pumilio | Smith, 1875 | |
| Hydrobia djerbaensis | Wilke, Pfenninger & Davis, 2002 | |
| Hydrobia minuta | Totten | |
| Hydrobia booneae | Morrison, 1954 | |
| Hydrobia acuta | (Draparnaud, 1805) | |
| Hydrobia antarctica | Philippi, 1868 | |
| Hoyia sheldoni | (Pilsbry, 1890) | Storm hydrobe |
| Holsingeria unthanksensis | Hershler, 1989 | Thankless ghostsnail |
| Helobia cuzcoensis | Pilsbry, 1911 | |
| Helobia lacustris | Hass, 1955 | |
| Helobia languiensis | Hass, 1955 | |
| Helobia neveui | (Bavay, 1904) | |
| Helobia profunda | Hass, 1955 | |
| Helobia culmiinea | (Orbigny, 1835) | |
| Helobia berryi | (Pilsbry, 1924) | |
| Helobia aperta | Hass, 1955 | |
| Helobia andecola | (Orbigny, 1835) | |
| Heligmopoma umbilicatum | Hass, 1955 | |
| Heleobia conexa | (Gaillard, 1974) | |
| Heleobops carrikeri | Davis & McKee, 1989 | |
| Heleobops docimus | Thompson, 1968 | |
| Heleobia australis | (d'Orbigny, 1835) | |
| Gillia altilis | (Lea, 1841) | Buffalo pebblesnail |
| Ecrobia ventrosa | (Montagu, 1803) | Spine snail |
| Ecrobia grimmi | (Clessin & Dybowski, 1888) | |
| Ecrobia truncata | (Vanatta, 1924) | Minute hydrobe |
| Dasyscias franzi | Thompson & Hershler, 1991 | Shaggy ghostsnail |
| Clathrocaspia gmelinii | (Clessin & Dybowski, 1887) | |
| Cincinnatia vanhyningi | (Vanatta, 1934) | Seminole siltsnail |
| Cincinnatia wekiwae | Thompson, 1968 | Wekiwa siltsnail |
| Cincinnatia winkleyi | (Pilsbry, 1912) | |
| Cincinnatia petrifons | Thompson, 1968 | Rock springs siltsnail |
| Cincinnatia ponderosa | Thompson, 1968 | Ponderous siltsnail |
| Cincinnatia parva | Thompson, 1968 | Pygmy siltsnail |
| Cincinnatia monroensis | (Dall, 1885) | Enterprise siltsnail |
| Cincinnatia integra | (Say, 1829) | Midland siltsnail |
| Cincinnatia mica | Thompson, 1968 | Ichetucknee siltsnail |
| Cincinnatia fraterna | Thompson, 1968 | Creek siltsnail |
| Cincinnatia helicogyra | Thompson, 1968 | Crystal siltsnail |
| Cincinnatia floridana | (Frauenfeld, 1863) | Hyacinth siltsnail |
| Cincinnatia comalensis | (Pilsbry & Ferriss, 1906) | Comal siltsnail |
| Birgella subglobosus | (Say, 1825) | Globe siltsnail |
| Ascorhis occidua | Ponder & Clark, 1988 | |
| Antillobia margalefi | Altaba, 1993 | |
| Amnicola winkleyi | Pilsbry, 1912 | |
| Amnicola stygius | Hubricht, 1971 | Stygian amnicola |
| Amnicola rhombostoma | Thompson, 1968 | Squaremouth amnicola |
| Amnicola limosus | (Say, 1817) | |
| Amnicola dalli | (Pilsbry & Beecher, 1892) | Peninsula amnicola |
| Amnicola cora | Hubricht, 1979 | Foushee cavesnail |