Helicodiscus parallelus (Say, 1821)
Animalia | Mollusca | Gastropoda | Stylommatophora | Helicodiscidae | Helicodiscus | Helicodiscus parallelus
dolomite rubble with nettles and jewelweed
UWA3173, Wyalusing Campground; 70m east of old immigrant trail junction, and 6.5