Vertigo occulta -

IUCN Status: Lower Risk/Near Threatened
IUCN Species Profile

WDNR - Midwest Pleistocene Vertigo: ...existing habitat. Note: Vertigo occulta Leonard, the Occult Vertigo, was recorded from Grant County, Wisconsin in 1983. These specimens ...
http://www.dnr.state.wi.us/org/land/er/factsheets/snails.htm

WDNR - Endangered and Threatened Species Factsheets - Snails: Endangered. (H) Midwest Pleistocene Vertigo Vertigo hubrichti. (H) Occult Vertigo Vertigo occulta. Threatened. (H) Wing Snaggletooth Gastrocopta procera. ...
http://www.state.ia.us/dnr/organiza/ppd/tespecies.htm

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