Planorbella duryi (Wetherby, 1879) Seminole Rams-horn

Planorbella duryi (Wetherby, 1879) Seminole Rams-horn

Planorbella duryi (Wetherby, 1879) Seminole Rams-horn

In roadside ditch, near Treaty Park, St. Johns County, FL 1/5/2006 (20 mm.)