Freshwater Snails of Illinois

The following lists were compiled by Kevin Cummings, Alison Stodola, Jeremy Tiemann, and Rachel Vinsel. Distributional data, scientific, and common names follow Cummings (1991), Tiemann and Cummings (2010), and Johnson et al. (2013) with updates from MolluscaBase (2018).

Special status includes:

  • ST – State Threatened
  • SE – State Endangered
  • FT – Federally Threatened
  • FE – Federally Endangered
  • X – Extirpated
  • (†) – Extinct
  • SGCN – Species in Greatest Conservation Need (Illinois Wildlife Action Plan)
  • W – Watch list (Illinois Wildlife Action Plan)
  • I – Introduced / Non-native

Class Gastropoda – Freshwater Snails (85 species)

Clade Caenogastropoda

Family Amnicolidae (3 species)

Amnicola limosa (Say, 1817) – Mud Amnicola SGNC
Lyogyrus pilsbryi Walker, 1906 – Lake Duskysnail
Lyogyrus walkeri Pilsbry, 1898 – Canadian Duskysnail

Family Bithyniidae (1 species)

Bithynia tentaculata (Linnaeus, 1758) – Mud Bithynia I

Family Hydrobiidae (12 species)

Birgella subglobosus (Say, 1825) – Globe Siltsnail W
Cincinnatia integra (Say, 1821) – Midland Siltnail W
Fontigens aldrichi (Call & Beecher, 1886) – Hoosier Amnicola W
Fontigens antroecetes (Hubricht, 1940) – Enigmatic Cavesnail SE
Fontigens nickliniana (Lea, 1839) – Watercress Snail
Hoyia sheldoni (Pilsbry, 1890) – Storm Hydrobe W
Marstonia lustrica (Pilsbry, 1890) – Boreal Marstonia W
Marstonia scalariformis (Wolf, 1870) – Moss Pyrg W
Probythinella emarginata (Kuster, 1852) – Delta Hydrobe
Somatogyrus depressus (Tryon, 1862) – Sandbar Pebblesnail W
Somatogyrus integra (Say, 1829) – Ohio Pebblesnail W
Somatogyrus tryoni Pilsbry & Baker, 1927 – Coldwater Pebblesnail W

Family Pleuroceridae (12 species)

Elimia costifera (Reeve, 1861) – Corded Elimia
Elimia livesens (Menke, 1830) – Liver Elimia
Elimia semicarinata (Say, 1829) – Fine-ridged Elimia
Leptoxis praerosa (Say, 1821) – Onyx Rocksnail SE
Leptoxis trilineata (Say, 1829) – Broad Mudalia
Lithasia armigera (Say, 1821) – Armored Rocksnail W
Lithasia geniculata Haldeman 1840 – Ornate Rocksnail W
Lithasia obovata (Say, 1829) – Shawnee Rocksnail SE
Lithasia verrucosa (Rafinesque, 1820) – Vericose Rocksnail W
Pleurocera acuta Rafinesque, 1831 – Sharp Hornsnail
Pleurocera alveare (Conrad, 1834) – Rugged Hornsnail W
Pleurocera canaliculata (Say, 1821) – Silty Hornsnail

Family Pomatiopsidae (2 species)

Pomatiopsis cincinnatiensis (Lea, 1840) – Brown Walker W
Pomatiopsis lapidaria (Say, 1817) – Slender Walker W

Family Tateidae (1 species)

Potamopyrgus antipodarum (Gray, 1853) – New Zealand Mudsnail I

Family Viviparidae (9 species)

Campeloma crassulum Rafinesque, 1819 – Ponderous Campeloma
Campeloma decisum (Say, 1816) – Pointed Campeloma
Campeloma rufum (Haldeman, 1841) – [uncertain classification]
Lioplax sulculosa (Menke, 1827) – Furowed Lioplax W
Viviparus georgianus (Lea, 1834) – Banded Mysterysnail
Viviparus intertextus (Say, 1829) – Rotund Mysterysnail W
Viviparus subpurpureus (Say, 1829) – Olive Mysterysnail W
Cipangopaludina chinensis (Reeve, 1863) – Chinese Mysterysnail I
Heterogen japonica (von Martens, 1861) – Japanese Mysterysnail I

Clade Heterobranchia

Family Lymnaeidae (18 species)

Acella haldemani (Binney, 1867) – Spindle Lymnaea W
Galba dalli (Baker, 1907) – Dusky Fossaria
Galba exigua (Lea, 1841) – Graceful Fossaria
Galba humilis (Say, 1822) – Marsh Fossaria
Galba modicella (Say, 1825) – Rock Fossaria
Galba obrussa (Say, 1825) – Golden Fossaria
Galba parva (Lea, 1841) – Pygmy Fossaria
Galba rustica (Lea, 1841) – Rusty Fossaria
Galba tazewelliana (Wolf, 1870) – Tazewell Fossaria W
Lymnaea stagnalis Linnaeus, 1758 – Swamp Lymnaea
Pseudosuccinea columella (Say, 1817) – Mimic Lymnaea
Radix auricularia (Linnaeus, 1758) – Big-ear Radix I
Stagnicola caperatus (Say, 1829) – Wrinkled Marshsnail W
Stagnicola catascopium (Say, 1817) – Woodland Pondsnail W
Stagnicola elodes (Say, 1821) – Marsh Pondsnail
Stagnicola exilis (Lea, 1834) – Flat-Whorled Pondsnail
Stagnicola walkeriana Baker, 1926 – Calabash Pondsnail
Stagnicola woodruffi (Baker 1901) – Coldwater Pondsnail W

Family Physidae (6 species)

Aplexa elongata (Say, 1821) – Lance Aplexa W
Physa skinneri Taylor, 1954 – Glass Physa
Physella gyrina (Say, 1821) – Tadpole Physa
Physella heterostropha (Say, 1817) – Pewter Physa W
Physella integra (Haldeman, 1841) – Ashy Physa W
Physella virgata (Gould, 1855) – Protean Physa W

Family Planorbidae (16 species) – includes species formerly in Ancylidae (Bouchet & Rocroi 2005)

Biomphalaria glabrata (Say, 1818) – Bloodfluke Planorb I
Ferrissia fragilis (Tryon, 1863) – Fragile Ancylid W
Ferrissia rivularis (Say, 1817) – Creeping Ancylid W
Gyraulus deflectus (Say, 1824) – Flexed Gyro W
Gyraulus parvus (Say, 1817) – Ash Gyro
Helisoma anceps (Menke, 1830) – Two-ridge Rams-horn W
Laevapex fuscus (C.B. Adams, 1841) – Dusky Ancyliid W
Menetus (Dilatata) dilatatus (Gould, 1841) – Bugle Sprite W
Menetus (Dilatata) sampsoni (Ancey, 1885) W
Planorbella campanulata (Say, 1821) – Bellmouth Rams-horn W
Planorbella trivolvis (Say, 1817) – Marsh Rams-horn
Planorbella truncata (Miles, 1861) – Druid Rams-horn W
Planorbula armigera (Say, 1821) – Thicklip Rams-horn W
Promenetus exacuous (Say, 1821) – Sharp Sprite W
Promenetus umbilicatellus (Cockerell, 1887) – Umbilicate Sprite W
Rhodacmea hinkleyi (Walker, 1908) – Knobby Ancylid W

Family Valvatidae (5 species)

Valvata bicarinata Lea, 1841 – Two-ridge Valvata
Valvata lewisi Currier, 1868 – Fringed Valvata W
Valvata perdepressa Walker, 1906 – Purplecap Valvata W
Valvata sincera Say, 1824 – Mossy Valvata W
Valvata tricarinata (Say, 1817) – Threeridge Valvata W

Literature Cited

Cummings, K.S. 1991. The aquatic Mollusca of Illinois. Pp. 429-439 in L.M. Page and M.R. Jeffords, eds. Our living heritage: The biological resources of Illinois. Illinois Natural History Survey Bulletin 34(4):357-477.

Johnson, P.D., A.E. Bogan, K.M. Brown, N.M. Burkhead, J.R. Cordeiro, J.T. Garner, P.D. Hartfield, D.A.W. Lepitzki, G.L. Mackie, E. Pip, T.A. Tarpley, J.S. Tiemann, N.V. Whelan, and E.E. Strong. 2013. Conservation Status of Freshwater Gastropods of Canada and the United States. Fisheries 38:247-282.

MolluscaBase (2018). Accessed at http://www.molluscabase.org on 2018-11-08

Tiemann, J.S. and K.S. Cummings. 2010. New record for the freshwater snail Lithasia geniculata (Gastropoda: Pleuroceridae) in the Ohio River, Illinois, with comments on potential threats to the population. Southeastern Naturalist 9(1):171-176.