The non-marine mollusks of the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

are a part of the molluscan

fauna of the United States The fauna of the United States of America is all the animals living in the Continental United States and its surrounding seas and islands, the Hawaiian Archipelago, Alaska in the Arctic, and several island-territories in the Pacific and in the ...

Freshwater gastropods

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Amnicolidae Amnicolidae is a family of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea. This family is in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & ...

* ''

Amnicola cora ''Amnicola cora'' is a species of very small freshwater snail which has an operculum, an aquatic prosobranch gastropod mollusk in the family Amnicolidae according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). This species is en ...

'' Hubricht 1979 - Foushee Cavesnail * ''

Amnicola dalli ''Amnicola dalli'', common name the peninsula amnicola, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Amnicolidae. The specific epithet is in honor of W. H. Dall. Subspecies * '' Amnicola ...

'' Pilsbry and Beecher 1892 - Peninsula Amnicola * '' Amnicola decisus'' Haldeman 1845 * ''

Amnicola limosus ''Amnicola limosus'', common name the mud amnicola, is a species of very small aquatic snail, an operculate gastropod mollusk in the family Hydrobiidae. Distribution This species is distributed in the Northwest Atlantic Ocean and along the Gu ...

'' Say 1817 - Mud Amnicola * '' Ammicola rhombostoma'' Thompson 1968 - Squaremouth Amnicola * ''

Amnicola stygius ''Amnicola'' is a genus of very small freshwater snails which have an operculum. ''Amnicola'' species are aquatic prosobranch gastropod mollusks in the family Amnicolidae according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). ...

'' Hubricht 1971 -Stygian Amnicola * '' Colligyrus convexus'' Hershler, Fresh, Liu, and Johannes 2003 - Canary dusky-snail * '' Colligyrus depressus'' Hershler 1999 - Harney Basin Duskysnail * '' Colligyrus greggi'' Pilsbry 1935 - Rocky Mountain Duskysnail * '' Dasyscias franzi'' Thompson and Hersler 1991 - Shaggy Ghostsnail * '' Lyogyrus bakerianus'' Pilsbry 1917 - Baker's Springsnail * '' Lyogyrus browni'' Carpenter 1872 - Slender Duskysnail * '' Lyogyrus granum'' Say 1822 -Squat Duskysnail * '' Lyogyrus latus'' Thompson and Hershler 1991 - cobble Sprite * '' Lyogyrus pilsbryi'' Walker 1906 - Lake Duskysnail * '' Lyogyrus pupoideus'' Gould 1841 - Pupa Duskysnail * '' Lyogyrus retromargo'' Thompson 1968 - Indented Duskysnail * '' Lyogyrus walkeri'' Pilsbry 1898 - Canadian Duskysnail ;

Pleuroceridae Pleuroceridae, common name pleurocerids, is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell. Reprodu ...

* '' Lithasia armigera'' - armigerous river snail or armored rocksnail * '' Lithasia curta'') - knobby rocksnail * '' Lithasia duttoniana'' - Dutton's river snail * '' Lithasia geniculata'' - geniculate river snail * '' Lithasia jayana'' - Jay's river snail * '' Lithasia lima'' - Elk River file snail * '' Lithasia salebrosa'' - muddy rocksnail * '' Lithasia verrucosa'' varicose rocksnail ;

Hydrobiidae Hydrobiidae, commonly known as mud snails, is a large cosmopolitan family of very small freshwater and brackish water snails with an operculum; they are in the order Littorinimorpha. Distribution Hydrobiidae are found in much of the world, ...

* '' Tryonia alamosae'' - Alamosa springsnail * '' Marstonia pachyta'' - armored marstonia - synonym: ''Pyrgulopsis pachyta'' * '' Pyrgulopsis erythropoma'' - Ash Meadows pebblesnail * '' Somatogyrus humerosus'' - atlas pebblesnail ;

Planorbidae Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instea ...

*'' Amphigyra alabamensis'' Pilsbry 1906 Shoal Sprite *'' Biomphalaria havanensis'' Pfeiffer 1839 - Ghost Ramshorn *'' Ferrisia fragilis'' Tryon 1863 - Fragile Ancylid (limpet) *'' Ferrisia rivularis'' Say 1817 - Creeping Ancylid (limpet) *'' Gyraulus circumstriatus'' Tryon 1866 - Disc Gyro *'' Gyraulus crista'' Linnaeus 1758 - Star Gyro *'' Gyraulus deflectus'' Say 1824 - Flexed Gyro *'' Gyraulus hornensis'' Baker 1934 - Tuba Gyro *'' Gyraulus parvus'' Say 1817 - Ash Gyro *'' Gyraulus vermicularis'' Gould 1847 - Pacific Coast Gyro *'' Hebetancylus excentricus'' Morelet 1851 - Excentric Ancylid (limpet) *'' Helisoma anceps'' Menke 1830 -Two-ridge Ramshorn *'' Helisoma minus'' Cooper 1870 *'' Helisoma newberryi'' Lea 1858 Great Basin Ramshorn *''

Laevapex fuscus ''Laevapex fuscus'', the dusky ancylid, is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc or micromollusc in the family Planorbidae, the ram's horn snails and their allies. Geographic distrib ...

'' Adams 1841 -Dusky Ancylid *'' Menetus dilatatus'' Gould 1841 - Bugle Sprite *'' Menetus opercularis'' Gould 1847 - Button Sprite *'' Micromenetus brogniartianus'' Lea 1842 - Disc Sprite *'' Micromenetus floridensis'' Baker 1945 - Penny Sprite *'' Micromenetus sampsoni'' Ancey 1885 - Sampson Sprite *'' Neoplanorbis carinatus'' Walker 1908 - Carinate Flat-top Snail *'' Neoplanorbis smithi'' Walker 1908 - Angled Flat-top Snail *'' Neoplanorbis tantillus'' Pilsbry 1906 - Little Flat-top Snail *'' Neoplanorbis umbilicatus'' Walker 1908 - Umbilicate Flat-top Snail *'' Pecosorbis kansasensis'' Berry 1966 - New Mexico Ramshorn *'' Planorbella ammon'' Gould 1855 - Jupiter Ramshorn *'' Planorbella binneyi'' Tryon 1867 - Coarse Ramshorn *'' Planorbella campanulata'' Say 1821 - Bellmouth Ramshorn *'' Planorbella columbiensis'' Baker 1945 - Caribou Ramshorn *'' Planorbella corpulenta'' Say 1824 - Corpulent Ramshorn *''

Planorbella duryi ''Planorbella duryi'', common name the Seminole rams-horn, is a species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. The species is endemic to Florida and is found frequen ...

'' Wetherby 1879 - Seminole Ramshorn *'' Planorbella magnifica'' Pilsbry 1903 - Magnificent Ramshorn *'' Planorbella multivolvis'' Case 1847 - Acorn Ramshorn *'' Planorbella occidentalis'' Cooper 1870 - Fine-lined Ramshorn *'' Planorbella oregonensis'' Tryon 1865 - Lamb Ramshorn *'' Planorbella pilsbryi'' Baker 1926 - File Ramshorn *'' Planorbella scalaris'' Jay 1839 - Mesa Ramshorn *'' Planorbella subcrenata'' Carpenter 1857 - Rough Ramshorn *'' Planorbella tenuis'' Dunker 1850 - Mexican Ramshorn *'' Planorbella traski'' Lea 1856 - Keeled Ramshorn *'' Planorbella trivolvis'' Say 1817 - Marsh Ramshorn *'' Planorbella truncata'' Miles 1861 - Druid Ramshorn *'' Planorbula armigera'' Say 1821 - Thicklip Ramshorn *'' Planorbula campestris'' Dawson 1875 - Meadow Ramshorn *'' Promenetus exacuous'' Say 1821 - Sharp Sprite *'' Promenetus umbillicatellus'' Cockerell 1887 - Thicklip Ramshorn *'' Rhodacmea cahawbensis'' Walker 1917 - Cahaba Ancylid *'' Rhodacmea elatior'' Anthony 1855 - Domed Ancylid *'' Rhodacmea filosa'' Conrad 1834 - Wicker Ancylid *'' Rhodacmea hinkleyi'' Walker 1908 - Knobby Ancylid *'' Vorticifex effusa'' Lea 1856 - Artemesian Ramshorn *'' Vorticifex solida'' Dall 1870 - ;

Physidae Physidae, common name the bladder snails, is a monophyletic taxonomic family of small air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the superfamily Lymnaeoidea .MolluscaBase eds. (2021). MolluscaBase. Physida ...

*'' Aplexa elongata'' Say 1821 -Lance Aplexa *'' Archiphysa ashmuni'' Taylor 2003 - San Rafael Physa *'' Archiphysa sonomae'' Taylor 2003 - Sonoma Physa *'' Laurentiphysa chippuvarum'' Taylor 2003 - Chippewa Physa *'' Physa carolinae'' Wethington, Dillon, Wise 2009 - Carolina Physa *'' Physa jennessi'' Dall 1919 - Obtuse Physa *'' Physa megalochlamys'' Taylor 1988 - Cloaked Physa *'' Physa natricina'' Taylor 1988 - Snake River Physa *'' Physa sibirica'' Westerlund 1876 - Frigid Physa *'' Physa skinneri'' Taylor 1954 - Glass Physa *'' Physa vernalis'' Taylor and Jokinen 1984 - Vernal Physa *''

Physella acuta ''Physella acuta'' is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic gastropod mollusk in the family Physidae. Common names include European physa, tadpole snail, bladder snail, and acute bladder snail ...

'' *''

Physella ancillaria ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Say 1825 - Pumpkin Physa *''

Physella bermudezi ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Aguayo 1935 - Lowdome Physa *''

Physella bottimeri ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Clench 1924 - Comanche Physa *''

Physella boucardi ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Cross and Fischer 1881 - Desert Physa *''

Physella columbiana ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Hemphill 1890 - Rotund Physa *''

Physella conoidea ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Fischer and Crosse 1886 - Texas Physa *''

Physella cooperi ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Tryon 1865 - Olive Physa *''

Physella costata ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Newcomb 1861 - Ornate Physa *'' Physella cubensis'' Pfeiffer 1839 - Carib Physa *'' Physella globosa'' Haldeman 1841 - Globose Physa *'' Physella gyrina'' Say 1821 - Tadpole Physa *'' Physella gyrina propinqua'' Tryon 1865 - Rocky Mountain Physa *'' Physella gyrina utahensis'' Clench 1925- Physa *'' Physella hemphilli'' Taylor 2003 - Idaho Physa *'' Physella hendersoni'' Clench 1925 - Bayou Physa *'' Physella heterostropha'' Say 1817 - Pewter Physa *'' Physella hordacea'' Lea 1864 - Grain Physa *'' Physella humerosa'' Gould 1855 - Corkscrew Physa *'' Physella integra'' Haldeman 1841 - Ashy Physa *'' Physella johnsoni'' Clench 1926 - Banff Springs Physa *'' Physella lordi'' Baird 1863 - Twisted Physa *'' Physella magnalacustris'' Walker 1901 - Great Lakes Physa *''

Physella mexicana ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the fami ...

'' Phillippi 1841 - Polished Physa * ''Physella microstriata'' — Fish Lake physaChamberlain and Berry 1930; U.S. endemic/extinct * ''Physella natricina'' — Snake River physa snail *'' Physella osculans'' Haldeman 1841 - Cayuse Physa *'' Physella parkeri'' Currier 1881 - Broadshoulder Physa *'' Physella pomilla'' Conrad 1834 - Claiborne Physa *'' Physella spelunca'' Turner and Clench 1974 - Cave Physa *'' Physella squalida'' Morelet 1851 - Squalid Physa *'' Physella traski'' Lea 1864 - Sculpted Physa *''

Physella vinosa ''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, Aquatic animal, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snai ...

'' Gould 1847 - Banded Physa *'' Physella virgata'' Gould 1855 - Protean Physa *'' Physella virginea'' Gould 1847 - Sunset Physa *'' Physella winnipegensis''Pip 2004 - Lake Winnipeg Physa *'' Physella wrighti'' Te and Clark 1985- Hotwater Physa *'' Physella zionis'' Pilsbry 1926 - Wet-rock Physa ;

Lymnaeidae Lymnaeidae, common name the pond snails, is a taxonomic family of small to large air-breathing freshwater snails, aquatic pulmonate gastropod mollusks, that belong to the clade Hygrophila. Lymnaeidae is the only family within the superf ...

*'' Stagnicola bonnevillensis'' * ''Stagnicola utahensis'' — Thickshell pondsnail

Land gastropods

Land gastropods in the USA include:

Charopidae Charopidae is a taxonomic family of small air-breathing land snails (and semi-slugs such as '' Otoconcha dimidiata''), terrestrial pulmonate gastropod mollusks in the superfamily Punctoidea.MolluscaBase eds. (2021). MolluscaBase. Charopidae Hu ...

* '' Radiodomus abietum'' (H.B. Baker, 1930)Rodrigo B. Salvador, Fred J. Brook, Lara D. Shepherd, Martyn Kennedy (2020). "Molecular phylogenetic analysis of Punctoidea (Gastropoda, Stylommatophora)".

Zoosystematics and Evolution ''Zoosystematics and Evolution'' is a peer-reviewed open access scientific journal covering zoological systematics and evolution. It was established in 1898 as ''Mitteilungen aus der Zoologischen Sammlung des Museums für Naturkunde in Berlin'' ...

96(2): 397-410.

Discidae Discidae is a taxonomic family of small air-breathing land snails, terrestrial gastropod mollusks in the superfamily Punctoidea. Genera The family Discidae has no subfamilies. Genera within the family Discidae include: * ''Anguispira'' Morse, ...

* '' Anguispira alternata'' (Say, 1816) * '' Anguispira jessica'' Kutchka, 1938 * '' Anguispira kochi'' (L. Pfeiffer, 1846) * '' Anguispira nimapuna'' H.B. Baker, 1932 * '' Anguispira strongyloides'' (Pfeiffer, 1854) * '' Discus nigrimontanus'' (Pilsbry, 1924) * '' Discus patulus'' (Deshayes, 1830) Helicodiscidae * '' Helicodiscus barri'' Hubricht, 1962 * '' Helicodiscus parallelus'' (Say, 1821) Oreohelicidae * '' Oreohelix idahoensis'' (Hemphill, 1890) * '' Oreohelix strigosa depressa'' Pilsbry, 1904 * '' Oreohelix vortex'' S.S. Berry, 1932 ;

Polygyridae Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. MolluscaBase eds. (2021). MolluscaBase. Polygyridae Pilsbry, 1895. Accessed through: World Register of Marine Species ...

* '' Fumonelix archeri'' - Archer's toothed land snail * '' Fumonelix jonesiana''- big-tooth covert, Jones' middle-toothed land snail ;

Punctidae Punctidae, common name the "dot snails" or "pinhead snails", is a family of minute air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the informal group Sigmurethra (according to the taxonomy of the Ga ...

* '' Punctum pygmaeum'' - Also known as the "dot snail", typically a translucent and flat shell, commonly found in forests or damp areas.

Freshwater bivalves

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Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is at its most divers ...

*''

Quadrula ''Quadrula'' is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae native to rivers of the American Midwest and mid-south. All have thick nacreous shells with well-developed hinge teeth, many also with external sh ...

'' — ''many species'' ** ''Quadrula apiculata'' — Southern mapleleaf ** ''Quadrula aurea'' — Golden orb ** ''Quadrula tuberosa'' — Rough rockshell (extinct)

Federally endangered or threatened

Federally endangered or threatened freshwater molluscs

There are 34 freshwater gastropod taxa on this list. The only marine endangered gastropod is '' Haliotis sorenseni''. The only overseas endangered land snail is ''

Papustyla pulcherrima The emerald green snail, green tree snail, or Manus green tree snail, scientific name ''Papustyla pulcherrima'', sometimes listed as ''Papuina pulcherrima'', is a species of large, air-breathing tree snail, a terrestrial pulmonate gastropod mo ...

''. Altogether 36 gastropod species are federally listed as of 2 October 2009. U.S. Fish & Wildlife Service (2009). ''Endangered Species Bulletin'
34(3)
31.

Federally endangered or threatened land gastropods

References

External links

Federally listed gastropods
(include one marine)
Federally listed bivalves
:*States
uark.edu: Arkansas
* Walker B. 1899
''The terrestrial Mollusca of Michigan''
27 pp.
'"Ecology of Northern Michigan" —Anootated list of the molluscs of the Porcupine Mountains and Isle Royale, Michigan
''pages 93-99; Walker B. & Ruthven A. G. 1906.''
nhp.nris.mt.gov: Montana

fieldguide.mt.go: Gastropoda fieldguide to Montana

* Kathryn E. Perez. (last edited September 12, 2006

Utah

at http://www.dgif.virginia.gov/wildlife/publications/ Special Status Faunal Species in Virginia

Official List of Virginia Native and Naturalized Species

dnr.wi.gov: Wisconsin
* Williams, J. D., Bogan, A. E., Butler, R. S., Cummings, K. S., Garner, J. T., Harris, J. L., ... & Watters, G. T. (2017)
"A Revised List of the Freshwater Mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada"
''Freshwater Mollusk Biology and Conservation'' 20: 33-58. {{Mollusc-stub *Non Marine Molluscs, Non Marine