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Family: Vertiginidae
Common name: none
Discovery: Brooks and Hunt, 1936
Identification
Height: ~1.5 mm
Width: ~0.8 mm
Whorls: 5
This species shares with Vertigo alabamensis an upper palatal lamella whose long-axis is exposed in apertural view. It differs from V. alabamensis by possessing a much smaller and more conical shell, with a deeper suture and an open umbilicus. It also shares a similar size and general shell shape with V. milium. However, it differs from V. milium by not possessing a long, curved lower palatal lamella.
Ecology
Vertigo clappi favors well-rotted, humid leaf litter and fine soil on shaded boulders, talus, ledges, and bases of forested lime-rich bedrock outcrops (Nekola & Coles 2010).
Taxonomy
This species has no synonyms.
Distribution
Vertigo clappi ranges from the mountains of southeastern Tennessee, north along the Appalachians to the north shore of Lake Ontario in southern Quebec.
In Virginia, this species occurs in three counties in the northern and central mountains. It is expected throughout the west, especially in cool, calcareous sites which wile not wet maintain high humidity.
Conservation
NatureServe Global Rank: G1G2
NatureServe State Rank: S1S2
Virginia’s wildlife action plan: Tier III
