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Browse Gastropod Families
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Due to the lack of distinctive shell characters,
the taxonomy of the Physid group both at the
species and generic level has been unstable. Recent studies indicate
that the number of biological species of physids has probably been
overestimated by an order-of-magnitude due to phenotypic plasticity.
Color varies as much within as between species.
 Taxonomy
- Purdue University
Anatomy
- Freshwater Mollusk Conservation Society |
Physa heterostropha
(aka P. acuta, Haitia heterostropha, H. acuta)
eastern physa
spire is pointed (acute) and whorls are convex with
deep sutures. up to 20 mm in height.
Reported Locations - W1 SHEO
Profile
- Freshwater Gastropods of South Carolina
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Physella gyrina
(aka Physa gyrina)
tadpole physa
spire is raised with rounded or
somewhat flattened sutures. up to 25 mm in height.
Reported Locations - XRN SEO
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** 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.
S (Lake Superior) based on:
H (Lake Huron) based on:
- Abundance,
Biomass, and Species Composition of Benthic Macroinvertebrate
Populations in Saginaw Bay, Lake Huron, 1987-96. Thomas Nalepa,
David Fanslow, Margaret Lansing, Gregory Lang, Mark Ford, Gerald
Gostenik, and David Hartson. NOAA Technical Memorandum GLERL-122.
- 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.
- Benthic
Community Structure and Composition among rocky habitats in the
Great Lakes and Keuka Lake, NY. 1987. Michael H. Winnell and David
J. Jude. JGLR 13(1)3-17.
- NOAA
Great Lakes Nonindigenous Species List
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:
X (Great Lakes coastal wetlands) based on:
W (wave zone = 0-2m) based on: 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.
R (rocky habitats) based on: Benthic
Community Structure and Composition among rocky habitats in the
Great Lakes and Keuka Lake, NY. 1987. Michael H. Winnell and David
J. Jude. JGLR 13(1)3-17.
N (nearshore) based on:
1 = 14-30m based on:
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