We report on a recently discovered population of the freshwater snail Lithasia geniculata (Ornate Rocksnail) (Gastropoda: Pleuroceridae) from the Ohio River, IL, the first documented occurrence for this species outside the Tennessee and Cumberland river basins. We collected 14 individuals on 26-27 August 2008 from the Ohio River, near Mound City, Pulaski County, IL. All of the specimens collected were discovered on an exposed shoal after the river dropped approximate to 0.5 m in a 24-hr period and had several (7-33) Dreissena polymorpha (Zebra Mussel) attached to their shells.
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics