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Publication: Johnson, Paul D., Arthur E. Bogan, Kenneth M. Brown, Noel M. Burkhead, James R. Cordeiro, et al. 2013. Conservation Status of Freshwater Gastropods of Canada and the United States. Fisheries, vol. 38, no. 6. 247-282.

ITIS records citing this publication
 
 Kingdom Animalia
  Acella Haldeman, 1841 -- valid
  Acella haldemani (W. G. Binney, 1867) -- valid -- spindle lymnaea
  Acroloxidae Thiele, 1931 -- valid -- capshells
  Acroloxus Beck, 1837 -- valid
  Acroloxus coloradensis (J. Henderson, 1930) -- valid -- Rocky Mountain capshell
  Amnicola Gould and Haldeman, 1840 -- valid
  Amnicola cora Hubricht, 1979 -- valid -- Foushee Cavesnail
  Amnicola dalli (Pilsbry and Beecher, 1892) -- valid -- Peninsula Amnicola
  Amnicola decisus Haldeman, 1845 -- valid
  Amnicola limosus (Say, 1817) -- valid -- Mud Amnicola
  Amnicola rhombostoma F. G. Thompson, 1968 -- valid -- Squaremouth Amnicola
  Amnicola stygius Hubricht, 1971 -- valid -- Stygian Amnicola
  Amnicolidae Tryon, 1863 -- valid
  Amphigyra Pilsbry, 1906 -- valid
  Amphigyra alabamensis Pilsbry, 1906 -- valid -- Shoal Sprite
  Antrobia Hubricht, 1971 -- valid
  Antrobia culveri Hubricht, 1971 -- valid -- Tumbling Creek Cavesnail
  Antrorbis Hershler and F. G. Thompson, 1990 -- valid
  Antrorbis breweri Hershler and F. G. Thompson, 1990 -- valid -- Conical Siltsnail
  Antroselates Hubricht, 1963 -- valid
  Antroselates spiralis Hubricht, 1963 -- valid -- Shaggy Cavesnail
  Aphaostracon F. G. Thompson, 1968 -- valid
  Aphaostracon asthenes F. G. Thompson, 1968 -- valid -- Blue Spring Hydrobe
  Aphaostracon chalarogyrus F. G. Thompson, 1968 -- valid -- Freemouth Hydrobe
  Aphaostracon hypohyalinum F. G. Thompson, 1968 -- valid -- Suwanee Hydrobe
  Aphaostracon monas (Pilsbry, 1899) -- valid -- Wekiwa Hydrobe
  Aphaostracon pachynotum F. G. Thompson, 1968 -- valid -- Thick-shell Hydrobe, Thick-shelled Hydrobe
  Aphaostracon pycnus F. G. Thompson, 1968 -- valid -- Dense Hydrobe
  Aphaostracon rhadinum F. G. Thompson, 1968 -- valid -- Slough Hydrobe
  Aphaostracon theiocrenetum F. G. Thompson, 1968 -- valid -- Clifton Spring Hydrobe
  Aphaostracon xynoelictum F. G. Thompson, 1968 -- valid -- Fenney Spring Hydrobe
  Aplexa Fleming, 1820 -- valid
  Aplexa elongata (Say, 1821) -- valid -- Lance Aplexa
  Archiphysa Taylor, 2003 -- valid
  Archiphysa ashmuni Taylor, 2003 -- valid -- San Rafael Physa
  Archiphysa sonomae Taylor, 2003 -- valid -- Sonoma Physa
  Assiminea Fleming, 1828 -- valid
  Assiminea infima S. S. Berry, 1947 -- valid -- Badwater Snail
  Assiminea pecos Taylor, 1987 -- valid -- Pecos Assiminea
  Athearnia Morrison, 1971 -- valid
  Athearnia anthonyi (Redfield, 1854) -- valid -- Anthony's Riversnail
  Athearnia crassa (Haldeman, 1841) -- valid -- Boulder Riversnail, Boulder Snail
  Balconorbis Hershler and Longley, 1986 -- valid
  Balconorbis uvaldensis Hershler and Longley, 1986 -- valid -- Balcones Ghostsnail
  Biomphalaria Preston, 1910 -- valid
  Biomphalaria havanensis (Pfeiffer, 1839) -- valid -- Ghost Ramshorn
  Birgella F. C. Baker, 1926 -- valid
  Birgella subglobosus (Say, 1825) -- valid -- Globe Siltsnail
  Bulimnaea Haldeman, 1841 -- valid
  Bulimnaea megasoma (Say, 1824) -- valid -- mammoth lymnaea
  Campeloma Rafinesque, 1819 -- valid
  Campeloma brevispirum F. C. Baker, 1928 -- valid
  Campeloma crassulum Rafinesque, 1819 -- valid -- Ponderous Campeloma
  Campeloma decampi (W. G. Binney, 1865) -- valid -- Slender Campeloma
  Campeloma decisum (Say, 1817) -- valid -- Pointed Campeloma
  Campeloma floridense Call, 1886 -- valid -- Purple-throat Campeloma, Purple-throated Campeloma
  Campeloma geniculum (Conrad, 1834) -- valid -- Ovate Campeloma
  Campeloma limum (Anthony, 1860) -- valid -- File Campeloma
  Campeloma milesi (Lea, 1863) -- valid
  Campeloma parthenum Vail, 1979 -- valid -- Maiden Campeloma
  Campeloma regulare (Lea, 1841) -- valid -- Cylinder Campeloma
  Campeloma rufum (Haldeman, 1841) -- valid
  Cincinnatia Pilsbry, 1891 -- valid
  Cincinnatia integra (Say, 1821) -- valid -- Midland Siltsnail
  Clappia Walker, 1909 -- valid
  Clappia cahabensis Clench, 1965 -- valid -- Armored Siltsnail, Cahaba pebblesnail
  Clappia umbilicata (Walker, 1904) -- valid -- Pumpkin Siltsnail, umbilicate pebblesnail
  Cochliopina Morrison, 1946 -- valid
  Cochliopina riograndensis (Pilsbry and Ferriss, 1906) -- valid -- Spiral Pebblesnail
  Colligyrus Hershler, 1999 -- valid
  Colligyrus convexus Hershler, Frest, Liu and Johannes, 2003 -- valid -- Canary Duskysnail
  Colligyrus depressus Hershler, 1999 -- valid -- Harney Basin Duskysnail
  Colligyrus greggi (Pilsbry, 1935) -- valid -- Rocky Mountain Duskysnail
  Dasyscias F. G. Thompson and Hershler, 1991 -- valid
  Dasyscias franzi F. G. Thompson and Hershler, 1991 -- valid -- Shaggy Ghostsnail
  Elimia H. Adams and A. Adams, 1854 -- valid
  Elimia acuta (Lea, 1831) -- valid -- Acute Elimia
  Elimia alabamensis (Lea, 1861) -- valid -- Mud Elimia
  Elimia albanyensis (Lea, 1864) -- valid -- Black-crest Elimia
  Elimia ampla (Anthony, 1854) -- valid -- Ample Elimia
  Elimia annae Mihalcik and F. G. Thompson, 2002 -- valid -- Rainbow Elimia
  Elimia annettae (Goodrich, 1941) -- valid -- Lilyshoals Elimia
  Elimia arachnoidea (Anthony, 1854) -- valid -- Spider Elimia
  Elimia aterina (Lea, 1863) -- valid -- Coal Elimia
  Elimia athearni (Clench and Turner, 1956) -- valid -- Knobby Elimia
  Elimia bellacrenata (Haldeman, 1841) -- valid -- Princess Elimia
  Elimia bellula (Lea, 1861) -- valid -- Walnut Elimia
  Elimia boykiniana (Lea, 1840) -- valid -- Flaxen Elimia
  Elimia brevis (Reeve, 1860) -- valid -- Short Spire Elimia, short-spire elimia
  Elimia broccata F. G. Thompson, 2000 -- valid -- Brooch Elimia
  Elimia buffyae Mihalcik and F. G. Thompson, 2002 -- valid -- Iris Elimia
  Elimia bullula (Lea, 1861) -- valid -- Yellowleaf Elimia
  Elimia caelatura (Reeve, 1860) -- valid -- rippled elimia, Savannah Elimia
  Elimia cahawbensis (Lea, 1861) -- valid -- Cahaba Elimia
  Elimia capillaris (Lea, 1861) -- valid -- Spindle Elimia
  Elimia carinifera (Lamarck, 1822) -- valid -- Sharp-crest Elimia
  Elimia carinocostata (Lea, 1854) -- valid -- Fluted Elimia
  Elimia catenaria (Say, 1822) -- valid -- Gravel Elimia
  Elimia catenoides (Lea, 1842) -- valid -- Lirate Elimia
  Elimia chiltonensis (Goodrich, 1941) -- valid -- Prune Elimia
  Elimia christyi (Lea, 1862) -- valid -- Knotty Elimia
  Elimia clara (Anthony, 1854) -- valid -- Riffle Elimia
  Elimia clausa (Lea, 1861) -- valid -- Closed Elimia
  Elimia clavaeformis (Lea, 1841) -- valid -- Club Elimia
  Elimia clenchi (Goodrich, 1924) -- valid -- Slackwater Elimia
  Elimia cochliaris (Lea, 1868) -- valid -- Cockle Elimia
  Elimia comalensis (Pilsbry, 1890) -- valid -- Balcones Elimia
  Elimia comma (Conrad, 1834) -- valid -- Hispid Elimia
  Elimia costifera (Reeve, 1861) -- valid -- Corded Elimia
  Elimia crenatella (Lea, 1860) -- valid -- Lacey Elimia
  Elimia curreyana (Lea, 1841) -- valid -- Amber Elimia
  Elimia cylindracea (Conrad, 1834) -- valid -- Cylinder Elimia
  Elimia darwini Mihalcik and F. G. Thompson, 2002 -- valid -- Pup Elimia
  Elimia dickinsoni (Clench and Turner, 1956) -- valid -- Stately Elimia
  Elimia dislocata (Reeve, 1861) -- valid -- Lapped Elimia
  Elimia dooleyensis (Lea, 1862) -- valid -- Graphite Elimia
  Elimia ebenum (Lea, 1841) -- valid -- Ebony Elimia
  Elimia edgariana (Lea, 1841) -- valid -- Cumberland Elimia
  Elimia exusta Mihalcik and F. G. Thompson, 2002 -- valid -- Fire Elimia
  Elimia fascinans (Lea, 1861) -- valid -- Banded Elimia
  Elimia flava (Lea, 1862) -- valid -- Yellow Elimia
  Elimia floridensis (Reeve, 1860) -- valid -- Rasp Elimia, Waccasassa Elimia
  Elimia fusiformis (Lea, 1861) -- valid -- Fusiform Elimia
  Elimia gibbera (Goodrich, 1922) -- valid -- Shouldered Elimia
  Elimia glarea Mihalcik and F. G. Thompson, 2002 -- valid -- Gravel Elimia
  Elimia godwini F. G. Thompson, 2000 -- valid -- Rusty Elimia
  Elimia hartmaniana (Lea, 1861) -- valid -- High-spired Elimia
  Elimia haysiana (Lea, 1843) -- valid -- Silt Elimia
  Elimia hydeii (Conrad, 1834) -- valid -- Gladiator Elimia
  Elimia impressa (Lea, 1841) -- valid -- Constricted Elimia
  Elimia inclinans (Lea, 1862) -- valid -- Slanted Elimia
  Elimia induta (Lea, 1862) -- valid -- Gem Elimia
  Elimia interveniens (Lea, 1862) -- valid -- Slowwater Elimia
  Elimia jonesi (Goodrich, 1936) -- valid -- Hearty Elimia
  Elimia lachryma (Reeve, 1861) -- valid -- Teardrop Elimia
  Elimia laeta (Jay, 1839) -- valid -- Ribbed Elimia
  Elimia laqueata (Say, 1829) -- valid -- Panel Elimia
  Elimia lecontiana (Lea, 1841) -- valid -- Rippled Elimia
  Elimia livescens (Menke, 1830) -- valid -- Liver Elimia
  Elimia macglameriana (Goodrich, 1936) -- valid -- Wrinkled Elimia
  Elimia melanoides (Conrad, 1834) -- valid -- Black Mudalia
  Elimia mihalcikae F. G. Thompson, 2000 -- valid -- Latticed Elimia
  Elimia modesta (Lea, 1845) -- valid -- Coldwater Elimia
  Elimia mutabilis (Lea, 1862) -- valid -- Oak Elimia
  Elimia nassula (Conrad, 1834) -- valid -- round-rib elimia, Round-ribed Elimia
  Elimia olivula (Conrad, 1834) -- valid -- Caper Elimia
  Elimia ornata (Lea, 1868) -- valid -- Ornate Elimia
  Elimia paupercula (Lea, 1862) -- valid -- Sooty Elimia
  Elimia perstriata (Lea, 1852) -- valid -- Engraved Elimia
  Elimia pilsbryi (Goodrich, 1927) -- valid -- Rough-lined Elimia
  Elimia plicatastriata (Wetherby, 1876) -- valid -- Carved Elimia
  Elimia porrecta (Lea, 1863) -- valid -- Nymph Elimia
  Elimia potosiensis (Lea, 1841) -- valid -- Pyramid Elimia
  Elimia proxima (Say, 1825) -- valid -- Sprite Elimia
  Elimia pupaeformis (Lea, 1864) -- valid -- Pupa Elimia
  Elimia pupoidea (Anthony, 1854) -- valid -- Bot Elimia
  Elimia pybasii (Lea, 1862) -- valid -- Spring Elimia
  Elimia pygmaea (H. H. Smith, 1936) -- valid -- Pygmy Elimia
  Elimia semicarinata (Say, 1829) -- valid -- Fine-ridged Elimia
  Elimia showalterii (Lea, 1861) -- valid -- Compact Elimia
  Elimia simplex (Say, 1825) -- valid -- Smooth Elimia
  Elimia striatula (Lea, 1842) -- valid -- File Elimia
  Elimia strigosa (Lea, 1841) -- valid -- Brook Elimia
  Elimia symmetrica (Haldeman, 1841) -- valid -- Symmetrical Elimia
  Elimia taitiana (Lea, 1841) -- valid -- Dented Elimia
  Elimia teres (Lea, 1841) -- valid -- Elegant Elimia
  Elimia teretria F. G. Thompson, 2000 -- valid -- Auger Elimia
  Elimia timida (Goodrich, 1942) -- valid -- Timid Elimia
  Elimia troostiana (Lea, 1838) -- valid -- Mossy Elimia
  Elimia ucheensis (Lea, 1862) -- valid -- Creek Elimia
  Elimia vanhyningiana (Goodrich, 1921) -- valid -- Goblin Elimia
  Elimia vanuxemiana (Lea, 1843) -- valid -- Cobble Elimia
  Elimia varians (Lea, 1861) -- valid -- Puzzle Elimia
  Elimia variata (Lea, 1861) -- valid -- Squat Elimia
  Elimia viennaensis (Lea, 1862) -- valid -- Slough Elimia
  Elimia virginica (Gmelin, 1791) -- valid -- Piedmont Elimia
  Eremopyrgus Hershler, 1999 -- valid
  Eremopyrgus eganensis Hershler, 1999 -- valid -- Steptoe Hydrobe
  Erinna H. Adams and A. Adams, 1855 -- valid
  Erinna aulacospira (Ancey, 1899) -- valid -- Hawaiian Bugle
  Erinna newcombi Adams and Adams, 1855 -- valid -- Newcomb's Bugle
  Ferrissia fragilis (Tryon, 1863) -- invalid -- Fragile Ancylid
  Ferrissia rivularis (Say, 1817) -- valid -- Creeping Ancylid
  Fisherola Hannibal, 1912 -- valid
  Fisherola nuttalli (Haldeman, 1841) -- valid -- Shortface Lanx
  Floridobia F. G. Thompson and Hershler, 2002 -- valid
  Floridobia alexander (F. G. Thompson, 2000) -- valid -- Alexander Siltsnail
  Floridobia floridana (Frauenfeld, 1863) -- valid -- Hyacinth Siltsnail
  Floridobia fraterna (F. G. Thompson, 1968) -- valid -- Creek Siltsnail
  Floridobia helicogyra (F. G. Thompson, 1968) -- valid -- Crystal Siltsnail
  Floridobia leptospira (F. G. Thompson, 2000) -- valid -- Flatwood Siltsnail
  Floridobia mica (F. G. Thompson, 1968) -- valid -- Ichetucknee Siltsnail
  Floridobia monroensis (Dall, 1885) -- valid -- Enterprise Siltsnail
  Floridobia parva (F. G. Thompson, 1968) -- valid -- Pygmy Siltsnail
  Floridobia petrifons (F. G. Thompson, 1968) -- valid -- Rock Springs Siltsnail
  Floridobia ponderosa (F. G. Thompson, 1968) -- valid -- Ponderous Siltsnail
  Floridobia porterae (F. G. Thompson, 2000) -- valid -- Green Cove Springsnail
  Floridobia vanhyningi (Vanatta, 1934) -- valid -- Seminole Siltsnail
  Floridobia wekiwae (F. G. Thompson, 1968) -- valid -- Wekiwa Siltsnail
  Floridobia winkleyi (Pilsbry, 1912) -- valid -- New England Siltsnail
  Fluminicola Stimpson, 1865 -- valid
  Fluminicola ahjumawi Hershler, Liu, Frest and Johannes, 2007 -- valid -- Sculpin Snail
  Fluminicola anserinus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Striated Hydrobe
  Fluminicola caballensis Hershler, Liu, Frest and Johannes, 2007 -- valid -- Horse Creek Pebblesnail
  Fluminicola coloradoensis Morrison, 1940 -- valid -- Green River Pebblesnail
  Fluminicola dalli (Call, 1884) -- valid -- Pyramid Lake Pebblesnail
  Fluminicola erosus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Smokey Charley Pebblesnail
  Fluminicola favillaceus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Ash Valley Pebblesnail
  Fluminicola fremonti Hershler, Liu, Frest and Johannes, 2007 -- valid -- Fremont Pebblesnail
  Fluminicola fuscus (Haldeman, 1847) -- valid -- Ashy Pebblesnail
  Fluminicola gustafsoni Hershler and Liu, 2012 -- valid -- Salmon River Pebblesnail
  Fluminicola insolitus Hershler, 1999 -- valid -- Donner und Blitzen Pebblesnail, Strange Pebblesnail
  Fluminicola lunsfordensis Hershler, Liu, Frest and Johannes, 2007 -- valid -- Lunsford Pebblesnail
  Fluminicola minutissimus Pilsbry, 1907 -- valid -- Pixie Pebblesnail
  Fluminicola modoci Hannibal, 1912 -- valid -- Modoc Pebblesnail
  Fluminicola multifarius Hershler, Liu, Frest and Johannes, 2007 -- valid -- Shasta Pebblesnail
  Fluminicola neritoides Hershler, Liu, Frest and Johannes, 2007 -- valid -- Willow Creek Pebblesnail
  Fluminicola nuttallianus (Lea, 1838) -- valid -- Dusky Pebblesnail
  Fluminicola potemicus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Potem Creek Pebblesnail
  Fluminicola scopulinus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Castle Creek Pebblesnail
  Fluminicola seminalis (Hinds, 1842) -- valid -- Nugget Pebblesnail
  Fluminicola turbiniformis (Tryon, 1865) -- valid -- Turban Pebblesnail
  Fluminicola umbilicatus Hershler, Liu, Frest and Johannes, 2007 -- valid -- Goose Valley Pebblesnail
  Fluminicola virens (Lea, 1838) -- valid -- Olympia Pebblesnail
  Fluminicola virginius Hershler, 1999 -- valid -- Virginia Mountains Pepplesnail
  Fluminicola warnerensis Hershler, Liu, Frest and Johannes, 2007 -- valid -- Topaz Pebblesnail
  Fontigens Pilsbry, 1933 -- valid
  Fontigens aldrichi (Call and Beecher, 1886) -- valid -- Hoosier Amnicola, Hoosier Springsnail
  Fontigens antroecetes (Hubricht, 1972) -- valid -- Missouri Cavesnail
  Fontigens bottimeri (Walker, 1925) -- valid -- Potomac Springsnail
  Fontigens cryptica Hubricht, 1963 -- valid -- Hidden Springsnail
  Fontigens morrisoni Hershler, Holsinger and Hubricht, 1990 -- valid -- Morrison's Springsnail
  Fontigens nickliniana (Lea, 1838) -- valid -- Watercress Snail
  Fontigens orolibas Hubricht, 1957 -- valid -- Blue Ridge Springsnail
  Fontigens proserpina (Hubricht, 1940) -- valid -- Proserpine Cavesnail
  Fontigens tartarea Hubricht, 1963 -- valid -- Organ Cavesnail
  Fontigens turritella Hubricht, 1976 -- valid -- Greenbrier Cavesnail
  Galba Schrank, 1803 -- valid
  Galba alberta F. C. Baker, 1919 -- valid -- Alberta Fossaria
  Galba bulimoides (Lea, 1841) -- valid -- Prairie Fossaria
  Galba cockerelli (Pilsbry and Ferriss, 1906) -- valid
  Galba cubensis (Pfeiffer, 1839) -- valid -- Carib Fossaria
  Galba cyclostoma (Walker, 1808) -- valid -- Bugle Fossaria
  Galba dalli (F. C. Baker, 1907) -- valid -- Dusky Fossaria
  Galba exigua (Lea, 1841) -- valid -- Graceful Fossaria
  Galba galbana (Say, 1825) -- valid -- Boreal Fossaria
  Galba humilis (Say, 1822) -- valid -- Marsh Fossaria
  Galba modicella (Say, 1825) -- valid -- Rock Fossaria
  Galba obrussa (Say, 1825) -- valid -- Golden Fossaria
  Galba parva (Lea, 1841) -- valid -- Pygmy Fossaria
  Galba peninsulae (Walker, 1908) -- valid
  Galba perplexa (F. C. Baker and J. Henderson, 1929) -- valid
  Galba perpolita (Dall, 1905) -- valid -- Glossy Fossaria
  Galba rustica (Lea, 1841) -- valid -- Rusty Fossaria
  Galba sonomaensis (Hemphill in Pilsbry and Ferriss, 1906) -- valid -- Sonoma Fossaria
  Galba tazewelliana (Wolf, 1870) -- valid -- Tazwell Fossaria
  Galba techella Haldeman, 1867 -- valid
  Galba truncatula (Muller, 1774) -- valid -- Attenuate Fossaria
  Galba vancouverensis (F. C. Baker, 1939) -- valid
  Gillia Stimpson, 1865 -- valid
  Gillia altilis (Lea, 1841) -- valid -- Buffalo Pebblesnail
  Gyraulus Agassiz, 1837 -- valid
  Gyraulus circumstriatus (Tryon, 1866) -- valid -- Disc Gyro
  Gyraulus crista (Linnaeus, 1758) -- valid -- Star Gyro
  Gyraulus deflectus (Say, 1824) -- valid -- Flexed Gyro
  Gyraulus hornensis F. C. Baker, 1934 -- valid -- Tuba Gyro
  Gyraulus parvus (Say, 1817) -- valid -- Ash Gyro
  Gyraulus vermicularis (Gould, 1847) -- valid -- Pacific Coast Gyro
  Gyrotoma Shuttleworth, 1845 -- valid
  Gyrotoma excisa (Lea, 1843) -- valid -- Excised Slitshell
  Gyrotoma lewisii (Lea, 1869) -- valid -- Striate Slitshell
  Gyrotoma pagoda (Lea, 1845) -- valid -- Pagoda Slitshell
  Gyrotoma pumila (Lea, 1860) -- valid -- Ribbed Slitshell
  Gyrotoma pyramidata (Shuttleworth, 1845) -- valid -- Pyramid Slitshell
  Gyrotoma walkeri (H. H. Smith, 1924) -- valid -- Round Slitshell
  Hebetancylus Pilsbry, 1914 -- valid
  Hebetancylus excentricus (Morelet, 1851) -- valid -- Excentric Ancylid
  Helisoma Swainson, 1840 -- valid
  Helisoma anceps (Menke, 1830) -- valid -- Two-ridge Ramshorn
  Helisoma minus (Cooper, 1870) -- valid
  Helisoma newberryi (Lea, 1858) -- valid -- Great Basin Ramshorn
  Holsingeria Hershler, 1989 -- valid
  Holsingeria unthanksensis Hershler, 1989 -- valid -- Thankless Ghostsnail
  Hoyia F. C. Baker, 1926 -- valid
  Hoyia sheldoni (Pilsbry, 1890) -- valid -- Storm Ghostsnail, storm hydrobe
  Io Lea, 1831 -- valid
  Io fluvialis (Say, 1825) -- valid -- Spiny Riversnail
  Ipnobius Hershler, 2001 -- valid
  Ipnobius robustus (Hershler, 1989) -- valid -- Robust Tryonia
  Juga H. Adams and A. Adams, 1854 -- valid
  Juga acutifilosa (Stearns, 1890) -- valid -- Topaz Juga
  Juga bulbosa (Gould, 1847) -- valid -- Bulb Juga
  Juga chacei (Henderson, 1935) -- valid -- Chace Juga
  Juga hemphilli (J. Henderson, 1935) -- valid -- Barren Juga
  Juga interioris (Goodrich, 1944) -- valid -- Smooth Juga
  Juga laurae (Goodrich, 1944) -- valid -- Oasis Juga
  Juga newberryi (Lea, 1860) -- valid -- Banded Juga
  Juga nigrina (Lea, 1856) -- valid -- Black Juga
  Juga occata (Hinds, 1844) -- valid -- Scalloped Juga
  Juga plicifera (Lea, 1838) -- valid -- Pleated Juga
  Juga silicula (Gould, 1847) -- valid -- Glassy Juga
  Juturnia Hershler, Liu and Stockwell, 2002 -- valid
  Juturnia kosteri (Taylor, 1987) -- valid -- Koster Springsnail
  Juturnia tularosae Hershler, Liu and Stockwell, 2002 -- valid -- Tularosa Juturnia, Tularosa Springsnail
  Laevapex Walker, 1903 -- valid
  Laevapex fuscus (C. B. Adams, 1841) -- valid -- Dusky Ancylid
  Lanx Clessin, 1882 -- valid
  Lanx alta (Tryon, 1865) -- valid -- Highcap Lanx
  Lanx klamathensis Hannibal, 1912 -- invalid -- Scale Lanx
  Lanx patelloides (Lea, 1856) -- valid -- Kneecap Lanx
  Lanx subrotunda (Tryon, 1865) -- invalid -- Rotund Lanx
  Laurentiphysa Taylor, 2003 -- valid
  Laurentiphysa chippevarum Taylor, 2003 -- valid -- Chippewa Physa
  Leptoxis Rafinesque, 1819 -- valid
  Leptoxis ampla (Anthony, 1855) -- valid -- Round Rocksnail
  Leptoxis arkansensis (Hinkley, 1915) -- valid -- Arkansas Mudalia
  Leptoxis carinata (Bruguiere, 1792) -- valid -- Crested Mudalia
  Leptoxis clipeata (H. H. Smith in Goodrich, 1922) -- valid -- Agate Rocksnail
  Leptoxis compacta (Anthony, 1854) -- valid -- Oblong Rocksnail
  Leptoxis dilatata (Conrad, 1835) -- valid -- Seep Mudalia
  Leptoxis foremani (Lea, 1843) -- valid -- Interrupted Rocksnail
  Leptoxis formosa (Lea, 1860) -- valid -- Maiden Rocksnail
  Leptoxis ligata (Anthony, 1860) -- valid -- Rotund Rocksnail
  Leptoxis lirata (H. H. Smith in Goodrich, 1922) -- valid -- Lirate Rocksnail
  Leptoxis minor (Hinkley, 1912) -- valid -- Knob Mudalia
  Leptoxis occultata (H. H. Smith in Goodrich, 1922) -- valid -- Bigmouth Rocksnail
  Leptoxis picta (Conrad, 1834) -- valid -- Spotted Rocksnail
  Leptoxis plicata (Conrad, 1834) -- valid -- Plicate Rocksnail
  Leptoxis praerosa (Say, 1821) -- valid -- Onyx Rocksnail
  Leptoxis showalterii (Lea, 1860) -- valid -- Coosa Rocksnail
  Leptoxis taeniata (Conrad, 1834) -- invalid -- Painted Rocksnail
  Leptoxis torrefacta (H. H. Smith in Goodrich, 1922) -- valid -- Squat Rocksnail
  Leptoxis trilineata (Say, 1829) -- valid -- Broad Mudalia
  Leptoxis umbilicata (Wetherby, 1876) -- valid -- Umbilicate Rocksnail
  Leptoxis virgata (Lea, 1841) -- valid -- Smooth Mudalia
  Leptoxis vittata (Lea, 1860) -- valid -- Striped Rocksnail
  Lepyrium Pilsbry and Olsson, 1951 -- valid
  Lepyrium showalteri (Lea, 1861) -- valid -- Flat Pebblesnail
  Lioplax Troschel, 1857 -- valid
  Lioplax cyclostomaformis (Lea, 1841) -- valid -- Cylindrical Lioplax
  Lioplax pilsbryi Walker, 1905 -- valid -- Choctaw Lioplax
  Lioplax subcarinata (Say, 1817) -- valid -- Ridgid Lioplax
  Lioplax sulculosa (Menke, 1827) -- valid -- furrowed lioplax
  Lithasia Haldeman, 1840 -- valid
  Lithasia armigera (Say, 1821) -- valid -- Armored Rocksnail
  Lithasia curta Lea, 1868 -- valid -- Knobby Rocksnail
  Lithasia duttoniana (Lea, 1841) -- valid -- Helmet Rocksnail
  Lithasia geniculata Haldeman, 1840 -- valid -- Ornate Rocksnail
  Lithasia hubrichti Clench, 1956 -- valid -- Big Black Rocksnail
  Lithasia jayana (Lea, 1841) -- valid -- Rugose Rocksnail
  Lithasia lima (Conrad, 1834) -- valid -- Warty Rocksnail
  Lithasia obovata (Say, 1829) -- valid -- Shawnee Rocksnail
  Lithasia salebrosa (Conrad, 1834) -- valid -- Muddy Rocksnail
  Lithasia spicula Minton, Savarese and Campbell, 2005 -- valid -- Harpeth Rocksnail
  Lithasia verrucosa (Rafinesque, 1820) -- valid -- Varicose Rocksnail
  Lithoglyphidae Tryon, 1866 -- valid
  Littoridinops Pilsbry, 1952 -- valid
  Littoridinops monroensis (Frauenfeld, 1863) -- valid -- Cockscomb Hydrobe
  Littoridinops palustris F. G. Thompson, 1968 -- valid -- Bantam Hydrobe
  Littoridinops tenuipes (Couper, 1844) -- valid -- Henscomb Hydrobe
  Lymnaea atkaensis Dall, 1884 -- valid -- Frigid Lymnaea
  Lymnaea producta (Mighels, 1845) -- valid
  Lymnaea rubella Lea, 1841 -- valid -- Aloha Lymnea
  Lymnaea stagnalis (Linnaeus, 1758) -- valid -- swamp lymnaea
  Lymnaeidae Rafinesque, 1815 -- valid -- elegant pondsnails
  Lyogyrus Gill, 1863 -- valid
  Lyogyrus bakerianus (Pilsbry, 1917) -- valid -- Baker's Springsnail
  Lyogyrus browni (Carpenter, 1872) -- valid -- Slender Duskysnail
  Lyogyrus granum (Say, 1822) -- valid -- Squat Duskysnail
  Lyogyrus latus F. G. Thompson and Hershler, 1991 -- valid -- Cobble Sprite
  Lyogyrus pilsbryi (Walker, 1906) -- valid -- Lake Duskysnail
  Lyogyrus pupoideus (Gould, 1841) -- valid -- Pupa Duskysnail
  Lyogyrus retromargo (F. G. Thompson, 1968) -- valid -- Indented Duskysnail
  Lyogyrus walkeri (Pilsbry, 1898) -- valid -- Canadian Duskysnail
  Marstonia Baker, 1926 -- valid
  Marstonia agarhecta F. G. Thompson, 1969 -- valid -- Ocmulgee Marstonia
  Marstonia angulobasis F. G. Thompson, 2005 -- valid -- Angled Marstonia
  Marstonia arga F. G. Thompson, 1977 -- valid -- Ghost Marstonia
  Marstonia castor F. G. Thompson, 1977 -- valid -- Beaverpond Marstonia
  Marstonia comalensis (Pilsbry and Ferriss, 1906) -- valid -- Comal Marstonia, Comal Siltsnail
  Marstonia gaddisorum F. G. Thompson, 2005 -- valid -- Emily's Marstonia
  Marstonia halcyon F. G. Thompson, 1977 -- valid -- Halcyon Marstonia
  Marstonia hershleri (F. G. Thompson, 1995) -- valid -- Coosa Pyrg
  Marstonia letsoni (Walker, 1901) -- valid -- Gravel Pyrg
  Marstonia lustrica (Pilsbry, 1890) -- valid -- Boreal Marstonia
  Marstonia ogmorhaphe F. G. Thompson, 1977 -- valid -- Royal Marstonia, Royal Springsnail
  Marstonia olivacea (Pilsbry, 1895) -- valid -- Olive Marstonia
  Marstonia ozarkensis (Hinkley, 1915) -- valid -- Ozark Pyrg
  Marstonia pachyta F. G. Thompson, 1977 -- valid -- Armored Marstonia
  Marstonia scalariformis (Wolf, 1870) -- valid -- Moss Pyrg
  Menetus H. Adams and A. Adams, 1855 -- valid
  Menetus opercularis (Gould, 1847) -- valid -- Button Sprite
  Micromenetus F. C. Baker, 1945 -- valid
  Micromenetus brogniartianus (Lea, 1842) -- valid -- Disc Sprite, Marsh Sprite
  Micromenetus dilatatus (Gould, 1841) -- valid -- Bugle Sprite
  Micromenetus floridensis (F. C. Baker, 1945) -- valid -- Penny Sprite
  Micromenetus sampsoni (Ancey, 1885) -- valid -- Sampson Sprite
  Neoplanorbis Pilsbry, 1906 -- valid
  Neoplanorbis carinatus Walker, 1908 -- valid -- Carinate Flat-top Snail
  Neoplanorbis smithi Walker, 1908 -- valid -- Angled Flat-top Snail
  Neoplanorbis tantillus Pilsbry, 1906 -- valid -- Little Flat-top Snail
  Neoplanorbis umbilicatus Walker, 1908 -- valid -- Umbilicate Flat-top Snail
  Neritina cariosa (Wood, 1828) -- valid -- Pip'wai
  Neritina clenchi Russell, 1940 -- valid
  Neritina granosa Sowerby, 1825 -- valid -- Hihiwai
  Neritina usnea (Roding, 1798) -- valid -- Olive Nerite
  Neritina vespertina Sowerby, 1849 -- valid -- Hapawai
  Notogillia Pilsbry, 1953 -- valid
  Notogillia sathon F. G. Thompson, 1969 -- valid -- Satyr Siltsnail
  Notogillia wetherbyi (Dall, 1885) -- valid -- Alligator Siltsnail
  Pecosorbis Taylor, 1985 -- valid
  Pecosorbis kansasensis (S. S. Berry, 1966) -- valid -- New Mexico Ramshorn
  Phreatoceras Hershler and Longley, 1987 -- valid
  Phreatoceras taylori (Hershler and Longley, 1986) -- valid -- Nymph Trumpet
  Phreatodrobia Hershler and Longley, 1986 -- valid
  Phreatodrobia conica Hershler and Longley, 1986 -- valid -- Hueco Cavesnail
  Phreatodrobia coronae Hershler and Longley, 1987 -- valid -- Crowned Cavesnail
  Phreatodrobia imitata Hershler and Longley, 1986 -- valid -- Mimic Cavesnail
  Phreatodrobia micra (Pilsbry and Ferriss, 1906) -- valid -- Flattened Cavesnail
  Phreatodrobia nugax (Pilsbry and Ferriss, 1906) -- valid -- Domed Cavesnail
  Phreatodrobia plana Hershler and Longley, 1986 -- valid -- Disc Cavesnail
  Phreatodrobia punctata Hershler and Longley, 1986 -- valid -- High-hat Cavesnail
  Phreatodrobia rotunda Hershler and Longley, 1986 -- valid -- Beaked Cavesnail
  Physa Draparnaud, 1801 -- valid
  Physa carolinae Wethington, Dillon and Wise, 2009 -- valid -- Carolina Physa
  Physa jennessi Dall, 1919 -- valid -- Obtuse Physa
  Physa megalochlamys Taylor, 1988 -- valid -- Cloaked Physa
  Physa natricina Taylor, 1988 -- valid -- Snake River Physa
  Physa siberica Westerlund, 1876 -- valid -- Frigid Physa
  Physa skinneri Taylor, 1954 -- valid -- Glass Physa
  Physa vernalis Taylor and Jokinen, 1984 -- valid -- Vernal Physa
  Physella Haldeman, 1842 -- valid
  Physella ancillaria (Say, 1825) -- valid -- Pumpkin Physa
  Physella bermudezi (Aguayo, 1935) -- valid -- Lowdome Physa
  Physella bottimeri (Clench, 1924) -- valid -- Comanche Physa
  Physella boucardi (Crosse and P. Fischer, 1881) -- valid -- Desert Physa
  Physella columbiana (Hemphill, 1890) -- valid -- Rotund Physa
  Physella conoidea (P. Fischer and Crosse, 1886) -- valid -- Texas Physa
  Physella cooperi (Tryon, 1865) -- valid -- Olive Physa
  Physella costata (Newcomb, 1861) -- valid -- Ornate Physa
  Physella cubensis (Pfeiffer, 1839) -- valid -- Carib Physa
  Physella globosa (Haldeman, 1841) -- valid -- Globose Physa
  Physella gyrina (Say, 1821) -- valid -- Tadpole Physa
  Physella hemphilli Taylor, 2003 -- valid -- Idaho Physa
  Physella hendersoni (Clench, 1925) -- valid -- Bayou Physa
  Physella heterostropha (Say, 1817) -- valid -- Pewter Physa
  Physella hordacea (Lea, 1864) -- valid -- Grain Physa
  Physella humerosa (Gould, 1855) -- valid -- Corkscrew Physa
  Physella integra (Haldeman, 1841) -- valid -- Ashy Physa
  Physella johnsoni (Clench, 1926) -- valid -- Banff Springs Physa
  Physella lordi (Baird, 1863) -- valid -- Twisted Physa
  Physella magnalacustris (Walker, 1901) -- valid -- Great Lakes Physa
  Physella mexicana (Philippi, 1841) -- valid -- Polished Physa
  Physella microstriata (Chamberlin and E. G. Berry, 1930) -- valid -- Fish Lake Physa
  Physella osculans (Haldeman, 1841) -- valid -- Cayuse Physa
  Physella parkeri (Currier, 1881) -- valid -- Broadshoulder Physa
  Physella pomilia (Conrad, 1834) -- valid -- Claiborne Physa
  Physella propinqua (Tryon, 1865) -- valid -- Rocky Mountain Physa
  Physella spelunca (Turner and Clench, 1974) -- valid -- Cave Physa
  Physella squalida (Morelet, 1851) -- valid -- Squalid Physa
  Physella traski (Lea, 1864) -- valid -- Sculpted Physa
  Physella utahensis (Clench, 1925) -- valid -- Utah Physa
  Physella vinosa (Gould, 1848) -- valid -- Banded Physa
  Physella virgata (Gould, 1855) -- valid -- Protean Physa
  Physella virginea (Gould, 1847) -- valid -- Sunset Physa
  Physella winnipegensis Pip, 2004 -- valid -- Lake Winnipeg Physa
  Physella wrighti Te and Clarke, 1985 -- valid -- Hotwater Physa
  Physella zionis (Pilsbry, 1926) -- valid -- Wet-rock Physa
  Planorbella Haldeman, 1842 -- valid
  Planorbella ammon (Gould, 1855) -- valid -- Jupiter Rams-horn, Jupiter Ramshorn
  Planorbella binneyi (Tryon, 1867) -- valid -- Coarse Rams-horn, Coarse Ramshorn
  Planorbella campanulata (Say, 1821) -- valid -- Bellmouth Rams-horn, Bellmouth Ramshorn
  Planorbella columbiensis (F. C. Baker, 1945) -- valid -- Caribou Rams-horn, Caribou Ramshorn
  Planorbella corpulenta (Say, 1824) -- valid -- Corpulent Rams-horn, Corpulent Ramshorn
  Planorbella duryi (Wetherby, 1879) -- valid -- Seminole Rams-horn, Seminole Ramshorn
  Planorbella magnifica (Pilsbry, 1903) -- valid -- Magnificent Rams-horn, Magnificent Ramshorn
  Planorbella multivolvis (Case, 1847) -- valid -- Acorn Rams-horn, Acorn Ramshorn
  Planorbella occidentalis (J. G. Cooper, 1870) -- valid -- Fine-lined Rams-horn
  Planorbella oregonensis (Tryon, 1865) -- valid -- Lamb Rams-horn, Lamb Ramshorn
  Planorbella pilsbryi (F. C. Baker, 1926) -- valid -- file rams-horn, File Ramshorn
  Planorbella scalaris (Jay, 1839) -- valid -- Mesa Rams-horn, Mesa Ramshorn
  Planorbella subcrenata (Carpenter, 1857) -- valid -- Rough Rams-horn, Rough Ramshorn
  Planorbella tenuis (Dunker, 1850) -- valid -- Mexican Rams-horn, Mexican Ramshorn
  Planorbella traski (Lea, 1856) -- valid -- Keeled Rams-horn, Keeled Ramshorn
  Planorbella trivolvis (Say, 1817) -- valid -- marsh rams-horn, Marsh Ramshorn
  Planorbella truncata (M. Miles, 1861) -- valid -- Druid Rams-horn, Druid Ramshorn
  Planorbula Haldeman, 1842 -- valid
  Planorbula armigera (Say, 1821) -- valid -- Thick-lipped Rams-horn, Thicklip Rams-horn, Thicklip Ramshorn
  Planorbula campestris (Dawson, 1875) -- valid -- Meadow Rams-horn, Meadow Ramshorn
  Pleurocera Rafinesque, 1818 -- valid
  Pleurocera acuta Rafinesque, 1831 -- valid -- Sharp Hornsnail
  Pleurocera alveare (Conrad, 1834) -- valid -- Rugged Hornsnail
  Pleurocera annulifera (Conrad, 1834) -- valid -- Ringed Hornsnail
  Pleurocera brumbyi (Lea, 1852) -- valid -- Spiral Hornsnail
  Pleurocera canaliculata (Say, 1821) -- valid -- Silty Hornsnail
  Pleurocera corpulenta (Anthony, 1854) -- valid -- Corpulent Hornsnail
  Pleurocera curta (Haldeman, 1841) -- valid -- Shortspire Hornsnail
  Pleurocera foremani (Lea, 1843) -- valid -- Rough Hornsnail
  Pleurocera gradata (Anthony, 1854) -- valid -- Bottle Hornsnail
  Pleurocera nobilis (Lea, 1845) -- valid -- Noble Hornsnail
  Pleurocera parva (Lea, 1862) -- valid -- Dainty Hornsnail
  Pleurocera postelli (Lea, 1862) -- valid -- Broken Hornsnail
  Pleurocera prasinata (Conrad, 1834) -- valid -- Smooth Hornsnail
  Pleurocera pyrenella (Conrad, 1834) -- valid -- Skirted Hornsnail
  Pleurocera showalteri (Lea, 1862) -- valid -- Upland Hornsnail
  Pleurocera striatum (Lea, 1863) -- valid -- Striate Hornsnail
  Pleurocera trochiformis (Conrad, 1834) -- valid -- Sulcate Hornsnail
  Pleurocera uncialis (Haldeman, 1841) -- valid -- Pagoda Hornsnail
  Pleurocera vestita (Conrad, 1834) -- valid -- Brook Hornsnail
  Pleurocera walkeri Goodrich, 1928 -- valid -- Telescope Hornsnail
  Pomacea Perry, 1810 -- valid
  Pomacea paludosa (Say, 1829) -- valid -- Florida Applesnail
  Pomatiopsis Tryon, 1862 -- valid
  Pomatiopsis binneyi Tryon, 1863 -- valid -- Robust Walker
  Pomatiopsis californica Pilsbry, 1899 -- valid -- Pacific Walker
  Pomatiopsis chacei Pilsbry, 1937 -- valid -- Marsh Walker
  Pomatiopsis cincinnatiensis (Lea, 1840) -- valid -- Brown Walker
  Pomatiopsis hinkleyi Pilsbry, 1896 -- valid -- Tennessee River Walker
  Pomatiopsis lapidaria (Say, 1817) -- valid -- Slender Walker
  Pristinicola Hershler, Frest, Johannes, Bowler and F. G. Thompson, 1994 -- valid
  Pristinicola hemphilli (Pilsbry, 1890) -- valid -- Pristine Pyrg
  Probythinella Thiele, 1928 -- valid
  Probythinella emarginata (Kuster, 1852) -- valid -- Delta Hydrobe
  Promenetus F. C. Baker, 1935 -- valid
  Promenetus exacuous (Say, 1821) -- valid -- Sharp Sprite
  Promenetus umbilicatellus (Cockerell, 1887) -- valid -- Umbilicate Sprite
  Pseudosuccinea F. C. Baker, 1908 -- valid
  Pseudosuccinea columella (Say, 1817) -- valid -- Mimic Lymnaea, Mimic Pondsnail
  Pseudotryonia Hershler, 2001 -- valid
  Pseudotryonia adamantina (Taylor, 1987) -- valid -- Diamond Tryonia
  Pseudotryonia alamosae (Taylor, 1987) -- valid -- Caliente Tryonia
  Pseudotryonia brevissima (Pilsbry, 1890) -- valid -- Regal Hydrobe
  Pseudotryonia grahamae F. G. Thompson, 2001 -- valid -- Salt Spring Hydrobe
  Pyrgophorus Ancey, 1888 -- valid
  Pyrgophorus platyrachis F. G. Thompson, 1968 -- valid -- Serrate Crownsnail, Serrated Crownsnail
  Pyrgophorus spinosus (Call and Pilsbry, 1886) -- valid -- Spiny Crownsnail
  Pyrgulopsis Call and Pilsbry, 1886 -- valid
  Pyrgulopsis aardahli Hershler, 1989 -- valid -- Benton Valley Springsnail
  Pyrgulopsis aloba Hershler, 1998 -- valid -- Duckwater Pyrg
  Pyrgulopsis amargosae Hershler, 1989 -- valid -- Amargosa Springsnail
  Pyrgulopsis anatina Hershler, 1998 -- valid -- Southern Duckwater Pyrg
  Pyrgulopsis anguina Hershler, 1998 -- valid -- Longitudinal Gland Pyrg
  Pyrgulopsis archimedis S. S. Berry, 1947 -- valid -- Archimedes Pyrg
  Pyrgulopsis arizonae (Taylor, 1987) -- valid -- Apache Springsnail
  Pyrgulopsis augustae Hershler, 1998 -- valid -- Elongate Cane Spring Pyrg
  Pyrgulopsis aurata Hershler, 1998 -- valid -- Pleasant Valley Pyrg
  Pyrgulopsis avernalis (Pilsbry, 1935) -- valid -- Moapa Pebblesnail
  Pyrgulopsis bacchus Hershler, 1988 -- valid -- Grand Wash Springsnail
  Pyrgulopsis basiglans Hershler, 1998 -- valid -- Large Gland Carico Pyrg
  Pyrgulopsis bedfordensis Hershler and Gustafson, 2001 -- valid -- Bedford Pyrg
  Pyrgulopsis bernardina (Taylor, 1987) -- valid -- San Bernardino Springsnail
  Pyrgulopsis bifurcata Hershler, 1998 -- valid -- Small Gland Carico Pyrg
  Pyrgulopsis blainica Hershler, Liu and Gustafson, 2008 -- valid -- Blane Pyrg
  Pyrgulopsis breviloba Hershler, 1998 -- valid -- Flat Pyrg
  Pyrgulopsis bruesi Hershler and Sada, 2000 -- valid -- Fy Ranch Pyrg
  Pyrgulopsis bruneauensis Hershler, 1990 -- valid -- Bruneau Hot Springsnail
  Pyrgulopsis bryantwalkeri Hershler, 1994 -- valid -- Cortez Hills Pebblesnail
  Pyrgulopsis californiensis (Gregg and Taylor, 1965) -- valid -- Laguna Mountain Springsnail
  Pyrgulopsis carinata Hershler, 1998 -- valid -- Carinate Duckwater Pyrg
  Pyrgulopsis carinifera (Pilsbry, 1935) -- valid -- Moapa Valley Pyrg
  Pyrgulopsis castaicensis Hershler and Liu, 2010 -- valid -- Middle Canyon Spring Pyrg
  Pyrgulopsis chamberlini Hershler, 1998 -- valid -- Smooth Glenwood Pyrg
  Pyrgulopsis chupaderae Taylor, 1987 -- valid -- Chupadera Springsnail
  Pyrgulopsis cinerana Hershler, Frest, Liu and Johannes, 2003 -- valid -- Ash Valley Pyrg
  Pyrgulopsis coloradensis Hershler, 1998 -- valid -- Blue Point Pyrg
  Pyrgulopsis conica Hershler, 1988 -- valid -- Kingman Springsnail
  Pyrgulopsis cruciglans Hershler, 1998 -- valid -- Transverse Gland Pyrg
  Pyrgulopsis crystalis Hershler and Sada, 1987 -- valid -- Crystal Springsnail
  Pyrgulopsis cybele Hershler and Liu, 2012 -- valid -- Nature Pyrg
  Pyrgulopsis davisi (Taylor, 1987) -- valid -- Limpia Creek Springsnail
  Pyrgulopsis deaconi Hershler, 1998 -- valid -- Spring Mountains Pyrg
  Pyrgulopsis deserta (Pilsbry, 1916) -- valid -- Desert Springsnail
  Pyrgulopsis diablensis Hershler, 1995 -- valid -- Diablo Range Pyrg
  Pyrgulopsis dixiensis Hershler, 1998 -- valid -- Dixie Valley Pyrg
  Pyrgulopsis eremica Hershler, 1995 -- valid -- Smoke Creek Pyrg
  Pyrgulopsis erythropoma (Pilsbry, 1899) -- valid -- Ash Meadows Pebblesnail
  Pyrgulopsis fairbanksensis Hershler and Sada, 1987 -- valid -- Fairbanks Springsnail
  Pyrgulopsis falciglans Hershler, Frest, Liu and Johannes, 2003 -- valid -- Likely Pyrg
  Pyrgulopsis fausta Hershler, 1998 -- valid -- Corn Creek Pyrg
  Pyrgulopsis fresti Hershler and Liu, 2009 -- valid -- Owyhee Hot Springsnail
  Pyrgulopsis fusca Hershler, 1998 -- valid -- Otter Creek Pyrg
  Pyrgulopsis gibba Hershler, 1995 -- valid -- Surprise Valley Pyrg
  Pyrgulopsis gilae (Taylor, 1987) -- valid -- Gila Springsnail
  Pyrgulopsis giuliani Hershler and Pratt, 1990 -- valid -- Southern Sierra Nevada Springsnail
  Pyrgulopsis glandulosa Hershler, 1988 -- valid -- Verde Rim Springsnail
  Pyrgulopsis gracilis Hershler, 1998 -- valid -- Emigrant Pyrg
  Pyrgulopsis greggi Hershler, 1995 -- valid -- Kern River Pyrg, Kern River Springsnail
  Pyrgulopsis hamlinensis Hershler, 1998 -- valid -- Hamlin Valley Pyrg
  Pyrgulopsis hovinghi Hershler, 1998 -- valid -- Upper Thousand Spring Pyrg
  Pyrgulopsis hubbsi Hershler, 1998 -- valid -- Hubbs Pyrg
  Pyrgulopsis humboldtensis Hershler, 1998 -- valid -- Humbolt Pyrg
  Pyrgulopsis ignota Hershler, Liu and Lang, 2010 -- valid -- Caroline Springs Pyrg
  Pyrgulopsis imperialis Hershler, 1998 -- valid -- Kings River Pyrg
  Pyrgulopsis inopinata Hershler, 1998 -- valid -- Carinate Glenwood Pyrg
  Pyrgulopsis intermedia (Tryon, 1865) -- valid -- Crooked Creek Springsnail
  Pyrgulopsis isolata Hershler and Sada, 1987 -- valid -- Elongate-gland Springsnail
  Pyrgulopsis kolobensis (Taylor, 1987) -- valid -- Toquerville Springsnail
  Pyrgulopsis landyei Hershler, 1998 -- valid -- Landyes Pyrg
  Pyrgulopsis lasseni Hershler, Frest, Liu and Johannes, 2003 -- valid -- Willow Creek Pyrg
  Pyrgulopsis lata Hershler, 1998 -- valid -- Butterfield Pyrg
  Pyrgulopsis lentiglans Hershler, 1998 -- valid -- Critteden Pyrg
  Pyrgulopsis leporina Hershler, 1998 -- valid -- Elko Pyrg
  Pyrgulopsis limaria Hershler, 1998 -- valid -- Squat Mud Meadows Pyrg
  Pyrgulopsis lockensis Hershler, 1998 -- valid -- Lockes Pyrg
  Pyrgulopsis longae Hershler, 1995 -- valid -- Long Valley Pyrg
  Pyrgulopsis longiglans Hershler, 1998 -- valid -- Western Lahontan Pyrg
  Pyrgulopsis longinqua (Gould, 1855) -- valid -- Salton Sea Springsnail
  Pyrgulopsis marcida Hershler, 1998 -- valid -- Hardy Pyrg
  Pyrgulopsis merriami (Pilsbry and Beecher, 1892) -- valid -- Pahranagat Pebblesnail
  Pyrgulopsis metcalfi (Taylor, 1987) -- valid -- Naegele Springsnail
  Pyrgulopsis micrococcus (Pilsbry, 1893) -- valid -- Oasis Valley Springsnail
  Pyrgulopsis militaris Hershler, 1998 -- valid -- Northern Soldier Meadow Pyrg
  Pyrgulopsis millenaria Hershler, 1998 -- valid -- Twentyone Mile Pyrg
  Pyrgulopsis milleri Hershler and Liu, 2010 -- valid -- Pierpoint Spring Pyrg
  Pyrgulopsis montana Hershler, 1998 -- valid -- Camp Valley Pyrg
  Pyrgulopsis montezumensis Hershler, 1988 -- valid -- Montezuma Well Springsnail
  Pyrgulopsis morrisoni Hershler, 1988 -- valid -- Page Springsnail
  Pyrgulopsis nanus Hershler and Sada, 1987 -- valid -- Distal-gland Springsnail
  Pyrgulopsis neomexicana (Pilsbry, 1916) -- valid -- Socorro Springsnail
  Pyrgulopsis neritella Hershler, 1998 -- valid -- Neritiform Steptoe Ranch Pyrg
  Pyrgulopsis nevadensis (Stearns, 1883) -- valid -- Corded Pyrg
  Pyrgulopsis nonaria Hershler, 1998 -- valid -- Ninemile Pyrg
  Pyrgulopsis notidicola Hershler, 1998 -- valid -- Elongate Mud Meadows Pyrg
  Pyrgulopsis orbiculata Hershler, 1998 -- valid -- Subo-globose Steptoe Ranch Pyrg
  Pyrgulopsis owensensis Hershler, 1989 -- valid -- Owens Valley Springsnail
  Pyrgulopsis owyheensis Hershler and Liu, 2009 -- valid -- Owyhee Upland Pyrg
  Pyrgulopsis papillata Hershler, 1998 -- valid -- Big Warm Spring Pyrg
  Pyrgulopsis pecosensis (Taylor, 1987) -- valid -- Pecos Springsnail
  Pyrgulopsis peculiaris Hershler, 1998 -- valid -- Bifid Duct Pyrg
  Pyrgulopsis pellita Hershler, 1998 -- valid -- Antelope Valley Pyrg
  Pyrgulopsis perturbata Hershler, 1989 -- valid -- Fish Slough Springsnail
  Pyrgulopsis pictilis Hershler, 1998 -- valid -- Ovate Cain Spring Pyrg
  Pyrgulopsis pilsbryana (J. L. Baily and R. I. Baily, 1952) -- valid -- Bear Lake Springsnail
  Pyrgulopsis pisteri Hershler and Sada, 1987 -- valid -- Median-gland Springsnail
  Pyrgulopsis planulata Hershler, 1998 -- valid -- Flat-topped Steptoe Pyrg
  Pyrgulopsis plicata Hershler, 1998 -- valid -- Black Canyon Pyrg
  Pyrgulopsis robusta (Walker, 1908) -- valid -- Jackson Lake Springsnail
  Pyrgulopsis roswellensis (Taylor, 1987) -- valid -- Roswell Springsnail
  Pyrgulopsis ruinosa Hershler, 1998 -- valid -- Fish Lake Pyrg
  Pyrgulopsis rupinicola Hershler, Frest, Liu and Johannes, 2003 -- valid -- Sucker Spring Pyrg
  Pyrgulopsis sadai Hershler, 1998 -- valid -- Sada's Pyrg
  Pyrgulopsis sathos Hershler, 1998 -- valid -- White River Valley Pyrg
  Pyrgulopsis saxatilis Hershler, 1998 -- valid -- Sub-globose Snake Pyrg
  Pyrgulopsis serrata Hershler, 1998 -- valid -- Northern Steptoe Pyrg
  Pyrgulopsis simplex Hershler, 1988 -- valid -- Fossil Springsnail
  Pyrgulopsis sola Hershler, 1988 -- valid -- Brown Springsnail
  Pyrgulopsis stearnsiana (Pilsbry, 1899) -- valid -- Yaqui Springsnail
  Pyrgulopsis sterilis Hershler, 1998 -- valid -- Sterile Basin Pyrg
  Pyrgulopsis sublata Hershler, 1998 -- valid -- Lake Valley Pyrg
  Pyrgulopsis sulcata Hershler, 1998 -- valid -- Southern Steptoe Pyrg
  Pyrgulopsis taylori Hershler, 1995 -- valid -- San Luis Obispo Pyrg
  Pyrgulopsis texana (Pilsbry, 1935) -- valid -- Phantom Cavesnail
  Pyrgulopsis thermalis (Taylor, 1987) -- valid -- New Mexico Hot Springsnail
  Pyrgulopsis thompsoni Hershler, 1988 -- valid -- Huachuca Springsnail
  Pyrgulopsis transversa Hershler, 1998 -- valid -- Southern Bonneville Pyrg
  Pyrgulopsis trivialis (Taylor, 1987) -- valid -- Black River Springsnail
  Pyrgulopsis turbatrix Hershler, 1998 -- valid -- Southeast Nevada Pyrg
  Pyrgulopsis umbilicata Hershler, 1998 -- valid -- Southern Soldier Meadow Pyrg
  Pyrgulopsis variegata Hershler, 1998 -- valid -- Northwest Bonneville Pyrg
  Pyrgulopsis varneri Heshler, Liu and Sada, 2007 -- valid -- Varner's Pyrg
  Pyrgulopsis ventricosa Hershler, 1995 -- valid -- Clear Lake Pyrg
  Pyrgulopsis villacampae Hershler, 1998 -- valid -- Duckwater Warm Springs Pyrg
  Pyrgulopsis vinyardi Hershler, 1998 -- valid -- Vinyards Pyrg
  Pyrgulopsis wongi Hershler, 1989 -- valid -- Wong's Pyrg
  Rhapinema F. G. Thompson, 1969 -- valid
  Rhapinema dacryon F. G. Thompson, 1969 -- valid -- Teardrop Snail
  Rhodacmea Walker, 1917 -- valid
  Rhodacmea cahawbensis (Walker, 1917) -- valid -- Cahaba Ancylid
  Rhodacmea elatior (Anthony, 1855) -- valid -- Domed Ancylid
  Rhodacmea filosa (Conrad, 1834) -- valid -- Wicker Ancylid
  Rhodacmea hinkleyi (Walker, 1908) -- valid -- Knobby Ancylid
  Somatogyrus Gill, 1863 -- valid
  Somatogyrus alcoviensis Krieger, 1972 -- valid -- Reverse Pebblesnail
  Somatogyrus amnicoloides Walker, 1915 -- valid -- Ouachita pebblesnail
  Somatogyrus aureus Tryon, 1865 -- valid -- Golden Pebblesnail
  Somatogyrus biangulatus Walker, 1906 -- valid -- Angular Pebblesnail
  Somatogyrus constrictus Walker, 1904 -- valid -- Knotty Pebblesnail
  Somatogyrus coosaensis Walker, 1904 -- valid -- Coosa Pebblesnail
  Somatogyrus crassilabris Walker, 1915 -- valid -- Thick-lip Pebblesnail
  Somatogyrus crassus Walker, 1904 -- valid -- Stocky Pebblesnail
  Somatogyrus currierianus (Lea, 1863) -- valid -- Tennessee Pebblesnail
  Somatogyrus decipiens Walker, 1909 -- valid -- Hidden Pebblesnail
  Somatogyrus depressus (Tryon, 1862) -- valid -- Sandbar Pebblesnail
  Somatogyrus excavatus Walker, 1906 -- valid -- Ovate Pebblesnail
  Somatogyrus georgianus Walker, 1904 -- valid -- Cherokee Pebblesnail
  Somatogyrus hendersoni Walker, 1909 -- valid -- Fluted Pebblesnail
  Somatogyrus hinkleyi Walker, 1904 -- valid -- Granite Pebblesnail
  Somatogyrus humerosus Walker, 1906 -- valid -- Atlas Pebblesnail
  Somatogyrus integra (Say, 1829) -- valid -- Ohio Pebblesnail
  Somatogyrus nanus Walker, 1904 -- valid -- Dwarf Pebblesnail
  Somatogyrus obtusus Walker, 1904 -- valid -- Moon Pebblesnail
  Somatogyrus parvulus Tryon, 1865 -- valid -- Sparrow Pebblesnail
  Somatogyrus pennsylvanicus Walker, 1904 -- valid -- Shale Pebblesnail
  Somatogyrus pilsbryanus Walker, 1904 -- valid -- Tallapoosa Pebblesnail
  Somatogyrus pumilus (Conrad, 1834) -- valid -- Compact Pebblesnail
  Somatogyrus pygmaeus Walker, 1909 -- valid -- Pygmy Pebblesnail
  Somatogyrus quadratus Walker, 1906 -- valid -- Quadrate Pebblesnail
  Somatogyrus rheophilus F. G. Thompson, 1984 -- valid -- Flint Pebblesnail
  Somatogyrus rosewateri M. E. Gordon, 1986 -- valid -- Elk Pebblesnail
  Somatogyrus sargenti Pilsbry, 1895 -- valid -- Mud Pebblesnail
  Somatogyrus strengi Pilsbry and Walker, 1906 -- valid -- Rolling Pebblesnail
  Somatogyrus substriatus Walker, 1906 -- valid -- Choctaw Pebblesnail
  Somatogyrus tenax F. G. Thompson, 1969 -- valid -- Savannah Pebblesnail
  Somatogyrus tennesseensis Walker, 1906 -- valid -- Opaque Pebblesnail
  Somatogyrus trothis Doherty, 1878 -- valid
  Somatogyrus tryoni Pilsbry and F. C. Baker, 1927 -- valid -- Coldwater Pebblesnail
  Somatogyrus virginicus Walker, 1904 -- valid -- Panhandle Pebblesnail
  Somatogyrus walkerianus Aldrich, 1905 -- valid -- Gulf Coast Pebblesnail
  Somatogyrus wheeleri Walker, 1915 -- valid -- Channelled Pebblesnail
  Spilochlamys F. G. Thompson, 1968 -- valid
  Spilochlamys conica F. G. Thompson, 1968 -- valid -- Conical Siltsnail
  Spilochlamys gravis F. G. Thompson, 1968 -- valid -- Armored Siltsnail
  Spilochlamys turgida F. G. Thompson, 1969 -- valid -- Pumpkin Siltsnail
  Spurwinkia Davis, Mazurkiewicz and Mandracchia, 1982 -- valid
  Spurwinkia salsa (Pilsbry, 1905) -- valid -- Saltmarsh Hydrobe
  Stagnicola Leach, 1830 -- valid
  Stagnicola apicina (Lea, 1838) -- valid -- Abbreviate Pondsnail
  Stagnicola arctica (Lea, 1864) -- valid -- Arctic Pondsnail
  Stagnicola bonnevillensis (Call, 1884) -- valid -- Fat-Whorled Pondsnail
  Stagnicola caperata (Say, 1829) -- valid -- Wrinkled Marshsnail
  Stagnicola catascopium (Say, 1817) -- valid -- Woodland Pondsnail
  Stagnicola contracta (Currier, 1881) -- valid -- Deepwater Pondsnail
  Stagnicola elodes (Say, 1821) -- valid -- Marsh Pondsnail
  Stagnicola elrodi (F. C. Baker and J. Henderson, 1933) -- valid -- Flathead Pondsnail
  Stagnicola elrodiana F. C. Baker, 1935 -- valid -- Longmouth Pondsnail
  Stagnicola emarginata (Say, 1821) -- valid -- St. Lawrence Pondsnail
  Stagnicola exilis (Lea, 1834) -- valid -- Flat-Whorled Pondsnail
  Stagnicola gabbi (Tryon, 1865) -- valid -- Striate Pondsnail
  Stagnicola hinkleyi (F. C. Baker, 1906) -- valid -- Rustic Pondsnail
  Stagnicola idahoensis (J. Henderson, 1931) -- valid -- Shortspire Pondsnail
  Stagnicola kennicotti Baker, 1933 -- valid -- Western Arctic Pondsnail
  Stagnicola mighelsi (W. G. Binney, 1865) -- valid -- Bigmouth Pondsnail
  Stagnicola montanensis (F. C. Baker, 1913) -- valid -- Mountain Marshsnail
  Stagnicola neopalustris (F. C. Baker, 1911) -- valid -- Piedmont Pondsnail
  Stagnicola oronoensis (F. C. Baker, 1904) -- valid -- Obese Pondsnail
  Stagnicola petoskeyensis (Walker, 1908) -- valid -- Petoskey Pondsnail
  Stagnicola pilsbryi (Hemphill, 1890) -- valid -- Fish Springs Marshsnail
  Stagnicola traski (Tryon, 1863) -- valid -- Widelip Pondsnail
  Stagnicola utahensis (Call, 1884) -- valid -- Thickshell Pondsnail
  Stagnicola walkeriana F. C. Baker, 1926 -- valid -- Calabash Pondsnail
  Stagnicola woodruffi (F. C. Baker, 1901) -- valid -- Coldwater Pondsnail
  Stiobia F. G. Thompson and McCaleb, 1978 -- valid
  Stiobia nana F. G. Thompson, 1978 -- valid -- Sculpin Snail
  Stygopyrgus Hershler and Longley, 1986 -- valid
  Stygopyrgus bartonensis Hershler and Longley, 1986 -- valid -- Barton Cavesnail
  Taylorconcha Hershler, Frest, Johannes, Bowler and F. G. Thompson, 1994 -- valid
  Taylorconcha insperata Hershler, Liu, Frest, Johannes and Clark, 2006 -- valid -- Unexpected Pebblesnail
  Taylorconcha serpenticola Hershler, Frest, Johannes, Bowler and F. G. Thompson, 1994 -- valid -- Bliss Rapids Snail
  Texapyrgus F. G. Thompson and Hershler, 1991 -- valid
  Texapyrgus longleyi F. G. Thompson and Hershler, 1991 -- valid -- Striated Hydrobe
  Tryonia Stimpson, 1865 -- valid
  Tryonia aequicostata (Pilsbry, 1890) -- valid -- Smooth-rib Hydrobe, Smooth-ribbed Hydrobe
  Tryonia angulata Hershler and Sada, 1987 -- valid -- Sportinggoods Tryonia
  Tryonia brunei Taylor, 1987 -- valid -- Brune's Springsnail
  Tryonia cheatumi (Pilsbry, 1935) -- valid -- Phantom Tryonia
  Tryonia circumstriata (Leonard and Ho, 1960) -- valid -- Gonzales Springsnail
  Tryonia clathrata Stimpson, 1865 -- valid -- Grated Tryonia
  Tryonia diaboli (Pilsbry and Ferriss, 1906) -- valid -- Devil Tryonia
  Tryonia elata Hershler and Sada, 1987 -- valid -- Point of Rocks Tryonia
  Tryonia ericae Hershler and Sada, 1987 -- valid -- Minute Tryonia
  Tryonia gilae Taylor, 1987 -- valid -- Gila Tryonia
  Tryonia imitator (Pilsbry, 1899) -- valid -- Mimic Tryonia
  Tryonia margae Hershler, 1989 -- valid -- Grapevine Springs Elongate Tryonia
  Tryonia metcalfi Hershler, Liu and Landye, 2011 -- valid -- Metcalf's Tryonia
  Tryonia monitorae Hershler, 1999 -- valid -- Monitor Tryonia
  Tryonia oasiensis Hershler, Liu and Landye, 2011 -- valid -- Carolinae Tryonia
  Tryonia porrecta (Mighels, 1845) -- valid -- Desert Tryonia
  Tryonia quitobaquitae Hershler, 1988 -- valid -- Quitobaquito Tryonia
  Tryonia rowlandsi Hershler, 1989 -- valid -- Grapevine Springs Squat Tryonia
  Tryonia salina Hershler, 1989 -- valid -- Cottonball Marsh Tryonia
  Tryonia variegata Hershler and Sada, 1987 -- valid -- Amargosa Tryonia
  Tulotoma Haldeman, 1840 -- valid
  Tulotoma magnifica (Conrad, 1834) -- valid -- Alabama live-bearing snail, Tulotoma
  Valvata O. F. Muller, 1774 -- valid
  Valvata bicarinata Lea, 1841 -- valid -- Two-ridge Valvata
  Valvata humeralis Say, 1829 -- valid -- Glossy Valvata
  Valvata lewisi Currier, 1868 -- valid -- Fringed Valvata
  Valvata mergella Westerlund, 1883 -- valid -- Rams-horn Valvata
  Valvata perdepressa Walker, 1906 -- valid -- Purplecap Valvata
  Valvata sincera Say, 1824 -- valid -- Mossy Valvata
  Valvata tricarinata (Say, 1817) -- valid -- Threeridge Valvata
  Valvata utahensis Call, 1884 -- valid -- Desert Valvata
  Valvata virens Tryon, 1863 -- valid -- Emerald Valvata
  Valvata winnebagoensis F. C. Baker, 1928 -- valid -- Flanged Valvata
  Viviparus georgianus (Lea, 1834) -- valid -- Banded Mysterysnail
  Viviparus goodrichi Archer, 1933 -- valid -- Globose Mysterysnail
  Viviparus intertextus (Say, 1829) -- valid -- Rotund Mysterysnail
  Viviparus limi Pilsbry, 1918 -- valid -- Ochlockonee Mysterysnail
  Viviparus subpurpureus (Say, 1829) -- valid -- Olive Mysterysnail
  Vorticifex Meek, 1870 -- valid
  Vorticifex effusa (Lea, 1856) -- valid -- Artemesian Rams-horn, Artemesian Ramshorn
  Vorticifex solida (Dall, 1870) -- valid
   

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