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Benthic Invertebrates
Gastropoda - Snails
Hydrobiidae

  
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Globe icon indicates a link to a non-NOAA siteFamily Profile - University of Michigan Animal Diversity Web

Key to Hydrobiid Genera

Most hydrobiids have monotonously simple, conical or depressed-conical shells that are nearly devoid of taxonomically useful characteristics. All are less than 10mm in size at maturity. Essentially identical shells occur repeatedly among unrelated genera and subfamilies. Important diagnostic characteristics for subfamilies, genera, and species are found in the female reproductive system, the male reproductive organ, and modifications of the radular teeth. The shells are secondarily useful for identification, but only when supplemented with anatomical information. All species except Potamopyrgus antipodarum (which bears live young and is parthenogenic with males extremely rare) have separate sexes and lay single egg capsules.

Amnicola limosa
Amnicola spp.

shell thin and smooth, subglobose to elongate, body whorl swollen and spire short, umbilicate

Hoyia sheldoni

Hoyia sheldoni

shell thin and smooth, subglobose to elongate, body whorl swollen and spire short, cleft or imperforate, 3-3.5mm.

rare profundal species found only in Lake Michigan

Gillia altilis
Gillia altilis

shell thick, short, body whorl large, imperforate or with a narrow umbilical chink, edge of aperature in a horizontal plane

Gastropod - Marstonia spp.
Marstonia spp.

shell thick, translucent with a light greenish or brownish color, 4.5-6 whorls, body whorl large, aperture imperforate or with a narrow umbilical chink, edge of aperature oblique, operculum has a single obvious spiral that fans out to the perimeter.
to 8mm (usually 3-5)


Potamopyrgus antipodarum

Potamopyrgus antipodarum

shell narrower, longer, and has more whorls (5-6) than native hydrobiids
4-7mm

 

Pyrgulopsis lustricus

shell thin, elongate and strongly carinate

up to 4mm

Gastropod - Probythinella lacustris

Probythinella lacustris

narrowly conical, apex truncate, umbilicus narrow. to 5mm

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Globe icon indicates a link to a non-NOAA siteGastropod anatomy - Freshwater Mollusk Conservation Society

Species List

    Genus Species Reported Locations**  
    Amnicola spp. WRN1 SHEO occurs in a wide variety of habitats from
small springs to large rivers and lakes.
      limosa X  
  Midland siltsnail (aka Cincinnatia) integra W E  
Amnicola limosa mud amnicola   limosa WRN1 SHEO  
  canadian duskysnail   walkeri R  
Gillia altilis Buffalo pebblesnail Gillia altilis O found in springs, streams and rivers
GLANSIS
Hoyia sheldoni storm hydrobe Hoyia sheldoni M known only from the deep waters of Lake Michigan
    Marstonia spp. 12 SO found in a wide variety of
habitats from springs and streams to lakes
  Pilsbry's Spire Snail   decepta 12 O  
Gastropod - Marstonia boreal marstonia (aka Pilsbry's Spire Snail) (aka Pyrgulopsis) lustrica S

typically found on rocks and on submerged aquatic vegetation to depths of 4m.
Globe icon indicates a link to a non-NOAA siteProfile - Mass Div of Fish and Wildlife

 

 

Potamopyrgus antipodarum New Zealand mud snail Potamopyrgus antipodarum SMO parthenogenic live bearers. Exotic.
Globe icon indicates a link to a non-NOAA siteProfile - USGS
Globe icon indicates a link to a non-NOAA siteProfile - Indiana University
Globe icon indicates a link to a non-NOAA siteComparison with similar species
GLANSIS
Gastropod - Probythinella lacutris delta hydrobe Probythinella lacustris (emarginata) XN HO found sporadically in ponds, lakes and streams, but usually in small numbers
    Pyrgulopsis lustricus X  

** 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:

M (Lake Michigan) based on combination of:

H (Lake Huron) based on:

E (Lake Erie) based on:

O (Lake Ontario) based on:

X (Great Lakes coastal wetlands) based on:

W (wave zone = 0-2m) based on: Globe icon indicates a link to a non-NOAA siteWave-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: Globe icon indicates a link to a non-NOAA siteBenthic 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:

2 = 31-50m 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.

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