Plate 4. Apertural views of North American freshwater gastropods considered extinct. Top Row (L-R): Stagnicola utahensis, ANSP[removed], Lifton Bear Lake, Idaho; Pomatiopsis hinkleyi, ANSP 68449, Tennessee River, Alabama;

Source URL: fl.biology.usgs.gov

• Pleuroceridae
• Clappia umbilicata
• Coosa River
• Gyrotoma
• Shoal sprite
• Elimia
• Somatogyrus
• Lithasia
• Thick-lipped pebblesnail
• Geography of Alabama
• Phyla
• Protostome