Image Usage Information
Family: Polygyridae
Common name: Velvet Wedge
Discovery: Férussac, 1821
Identification
Width: 18-26 mm
Height: 10-14 mm
Whorls: 5+
Xolotrema denotatum has an exceptional shell – large, dark, and fuzzy with a striking flared lip. The outer coat of its shell is covered with fine, hair-like processes, giving it a moleskin-like texture, and it is often draped with cobwebs that provide a sort of camouflage. Old shells lose this fine coating as it is part of the outer protein coat, or periostracum. The lip is concave and has elongate parietal and basal teeth, and a shorter, blunt palatal tooth. The umbilicus is usually closed and the animal itself is very dark-colored.
Ecology
This species is often found near or upon big logs and snags, sometimes on steep, damp slopes where large trees have fallen. It may also occasionally be found on floodplains (Hubricht, 1985).
Taxonomy
Synonyms for X. denotatum are Helix denotata, Triodopsis denotata, Triodopsis notata, and Xolotrema denotata.
Distribution
This animal lives in upland forests from Vermont, southeastern Canada, and Michigan, south to eastern Arkansas, northern Mississippi, and Alabama. In Virginia it is mainly in the western counties but is also reported from Fairfax County (Hubricht, 1985).
Conservation
NatureServe Global Rank: G5
NatureServe State Rank: S3S4
