Plate 3. Apertural views of assorted North American freshwater gastropods. Top Row (L-R): Planorbella trivolvis, USNM[removed], Joliet, Illinois; Viviparus subpurpureus, ANSP[removed], Wabash River, Indiana; Vorticifex effus

Source URL: fl.biology.usgs.gov

• Elimia
• Lithasia
• Viviparus
• Rugged hornsnail
• Pleurocera
• Geniculate river snail
• Planorbella
• Freshwater snail
• Pleuroceridae
• Phyla
• Protostome