Campeloma decisum

Shell aperture oval - operculum with a concentric (central) nucleus. Outer shell surface greenish in color with no banding, shell interior white to light blue. Shoulders of whorls rounded and distinct from previous whorl - sutures that separate whorls are indented. Smooth with no sculpturing other than fine striae. 25mm.

Viviparus georgianus

The shell aperture and operculum nearly circular - operculum with a concentric (central) nucleus. Outer shell surface brown to tan with 4 bands. Shell interior usually white or with a purplish hue. Shoulders between shell whorls weak, sutures are indented. 38mm.

Cipangopaludina chinensis and japonica

Shell aperature round to oval with a reflected, black pigmented lip. Operculum with a submarginal (located nearer the outer lip) nucleus. Outer shell surface light to dark olive-green, without any color bands. Whorls are strongly convex, with a very slight shoulder, and the suture is deeply indented. Shell sculpture consists of fine growth lines, spiral lines and fine to moderate malleations over the entire surface.

C. chinensis - shell with more rounded shoulders and broader shape

C. japonica - narrower and more turreted shell - sculpted (carinate). to 65mm.

Species List

Exotic.
Profile - USGS
GLANSIS

Native to southern US but expanding its range northward.
Profile - USGS
Profile-Aquasnail
GLANSIS

** Reported locations based on a limited literature search. Codes indicate presence reported but absence of a code should not be interpreted as a species absence.

M (Lake Michigan) based on combination of:

• Trophic Status of Southeastern Lake Michigan Based on the Chironimidae (Diptera). 1985. Michael H. Winnell and D.S. White. JGLR 11(4)540-548.
• The Nearshore Benthic Invertebrate Community of Southern Lake Michigan and its Response to Beach Nourishment. 2004. Eric L. Garza and Richard L. Whitman. J. Great Lakes Res. 30(1):114–122.
• Abundance and biomass of the meiobenthos in nearshore Lake Michigan with comparisons to the macrobenthos. 1983. JGLR 9(4)530-547.

E (Lake Erie) based on:

• Relationships among zoobenthos, sediments, and organic matter in littoral zones of western Lake Erie and Saginaw Bay. 1983. Richard A. Cole and Diana L. Weigmann. JGLR 9(4)568-581.
• Wave-zone macrobenthos of the exposed Canadian shores of the St. Lawrence Great Lakes. 1978. D.R. Barton and B.N. Hynes. JGLR 4(1)27-45.
• Distribution of some common benthic invertebrates in nearshore Lake Erie, with emphasis on depth and type of substratus. 1988. David R. Barton. JGLR 14(1)34-43.
• Benthic and pelagic secondary production in Lake Erie after the invasion of Dreissena spp. with implications for fish production. 2000. Ora E. Johannsson, Ron Dermott, Donna M Graham, Julie A. Dahl, E. Scott Millard, Debra D. Myles, and Jennifer LeBlanc. JGLR 26(1)31-54.
• Changes in the benthic macroinvertebrate community of the Cleveland Harbor area of Lake Erie from 1978 to 1989. 1993. Kenneth A. Krieger and Lloyd S. Ross. JGLR 19(2) 237-249.
• Lethal and sublethal effects of sponge overgrowth on introduced dreissenid mussels in the Great Lakes - St. Lawrence River system. 1995. A Ricciardi, FL Snyder, DO Kelch and HM Reiswig. CJFAS 52:2695-2703.
• Changes to the deepwater benthos of eastern Lake Erie since the invasion of Dreissena 1979-1993. 1997. R Dermott and D Kerec. CJFAS 54: 922-930.
• NOAA Great Lakes Nonindigenous Species List

O (Lake Ontario) based on:

• Disruption of the benthic community in Lake Ontario. 2003. S.J. Lozano and T.F. Nalepa. in State of Lake Ontario (SOLO) -- Past, Present and Future. M Munawar (ed). Ecovision World Monograph Series. Aquatic Ecosystem Health and Management Society.
• Wave-zone macrobenthos of the exposed Canadian shores of the St. Lawrence Great Lakes. 1978. D.R. Barton and B.N. Hynes. JGLR 4(1)27-45.
• Factors influencing changes in the nearshore benthic community on the Canadian site of Lake Ontario. 2000. Bruce W. Kilgour, Robert C. Bailey, and E Todd Howell. JGLR 26(3)272-286.
• Benthic macroinvertebrate communities of southwestern Lake Ontario following invasion of Dreissena. 1994. Timothy W. Stewart and James M. Haynes. JGLR 20(2)479-493.
• Benthic macroinvertebrate communities in southwestern Lake Ontario following invasion of Dreissena: Continuing change. 1999. James M. Haynes, Timothy W. Stewart, and George E. Cook. JGLR 25(4)828-838.
• NOAA Great Lakes Nonindigenous Species List
• Changes to the deepwater benthos of eastern Lake Erie since the invasion of Dreissena 1979-1993. 1997. R Dermott and D Kerec. CJFAS 54: 922-930.

X (Great Lakes coastal wetlands) based on:

• The ecology of invertebrates in Great Lakes coastal wetlands: current knowledge and research needs. 1992. Kenneth A. Krieger. JGLR 18(4)634-650.
• Burton, T.M., D.G. Uzarski and J.A. Genet. 2004.  Invertebrate habitat use in relation to fetch and plant zonation in northern Lake Huron coastal wetlands.  Aquatic Ecosystem Health & Management. 7(2): 249-267