Virginia Land Snails
Photo(s): Views of a Punctum vitreum shell by Dan Dourson ©.
Click photo(s) to enlarge.
Punctum vitreum (H.B. Baker, 1930)
Common name: Glass Spot
Width: ≈1.2 – 1.4 mm
Height: ≈0.8 – 0.9 mm
Punctum vitreum has a shell sculpture of fine radial riblets that are set widely apart. Between these are smaller ribs of growth, crossed by spiral striae (Pilsbry, 1948). The shell is heliciform, depressed, with a thin lip and open umbilicus, as are other Punctum. The shell spire is lower than in P. minutissimum, and the shell is more yellow and transparent.
This species lives in forest leaf litter, often with P. minutissimum (Hubricht, 1985).
A synonym is P. pygmaeum.
Punctum vitreum is reported from Pennsylvania and New Jersey, west to Iowa and south to Texas, however, it is absent from the deep Southeastern states such as Georgia and Florida. In Virginia, Punctum vitreum is reported in widely scattered counties around the state.
NatureServe Global Rank: G5
NatureServe State Rank: S3
Ken Hotopp 1/2013Range Map