A Guide for Terrestrial Gastropod Identification - University of ...
A Guide for Terrestrial Gastropod Identification - University of ...
A Guide for Terrestrial Gastropod Identification - University of ...
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Discus bryanti (Harper, 1881) G3 AL, KY, NC, TN, VA<br />
CT, DE, IA, IN, KY, MA, MD, ME, MI, MN, MS, NH, NJ,<br />
NY, PA, RI, SD, TN, VA, VT, WI, WV; Canada: MB, NS,<br />
Discus catskillensis (Pilsbry, 1896) G5<br />
ON<br />
Discus clappi (Pilsbry, 1924) G1 AL, TN<br />
Discus macclintocki (F.C Baker, 1928) G1 LE IA, IL, MO<br />
Discus marmorensis H.B. Baker, 1932 G1G2 IA, ID<br />
Discus nigrimontanus (Pilsbry, 1924) G4 AL, AR, KY, MO, NC, TN, VA<br />
AL, FL, GA, IA, IL, IN, KY, LA, MD, MI, MO, MS, NC,<br />
Discus patulus (Deshayes, 1830) G5<br />
NY, OH, PA, SC, TN, VA, WI, WV; Canada: ON<br />
Discus selenitoides (Pilsbry, 1890) G1 CA<br />
AZ, CO, IA, IL, KS, MO, MT, NE, NM, OR, SD, UT, WY;<br />
Discus shimekii (Pilsbry, 1890) G5<br />
Canada: AB, BC, YT<br />
AK, AZ, AR, CA, CT, DE, IA, ID, IL, IN, KS, KY, MA,<br />
MD, ME, MI, MN, MO, MT, NC, ND, NE, NJ, NM, NY,<br />
OH, OK, PA, SD, TX, UT, VA, VT, WA, WI, WV; Canada:<br />
Discus whitneyi (Newcomb, 1864) G5<br />
AB, BC, NB, NS, QC, LB, NF<br />
Speleodiscoides spirellum A.G. Smith, 1957 G1 CA<br />
Haplotrematidae<br />
Jochen Gerber, Field Museum <strong>of</strong> Natural History<br />
These snails have medium-sized to large, depresseed to almost planispiral, openly<br />
umbilicated shells, mostly light-colored shells. The peristome is not or very narrowly expanded<br />
and usually blunt, but not particularly thickened, and it lacks folds or teeth.<br />
The Family is restricted to the Americas and the West Indies. In North America, only<br />
two species live east <strong>of</strong> the Rocky Mountains, one, Haplotrema concavum, with a very wide<br />
distribution. The bulk <strong>of</strong> the North American species is found in the states and provinces<br />
bordering the Pacific.<br />
Haplotrematids live usually in <strong>for</strong>est habitats in leaf litter and under logs and stones.<br />
They are known to be omnivorous: they eat other snails, earth worms, etc., as well as plant<br />
material.<br />
TAXON AUTHOR<br />
G-<br />
RANK DISTRIBUTION<br />
Ancotrema hybridum (Ancey, 1888) G5 CA, ID, OR, WA; Canada: BC<br />
Ancotrema sportella (Gould, 1846) G4 AK, CA, ID, OR, WA; Canada: BC<br />
Ancotrema voyanum (Newcomb, 1865) G1G2 CA, OR<br />
Ancotrema zopherum Roth, 1990 G1 CA<br />
Haplotrema alameda Pilsbry, 1930 G1G2 CA<br />
27
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