Planorbella pilsbryi (F. C. Baker, 1926) File Rams-horn

Planorbella pilsbryi (F. C. Baker, 1926) File Rams-horn

Planorbella pilsbryi (F. C. Baker, 1926) File Rams-horn

Planorbella pilsbryi (F. C. Baker, 1926) File Rams-horn

Planorbella pilsbryi (F. C. Baker, 1926) File Rams-horn

Bark River, six miles west of Cornucopia, Bayfield County, Wisconsin, 7/15/1990 (23 mm.)