• 11 species in North America
Phylum: Mollusca
Class: Gastropoda
Order: Pulmonata
Family: Ancylidae

Identification Tips:

• Shell shaped like a long flattened cone

Life History:

• Typically found clinging to rocks or other hard surfaces in flowing water
• Feed by scraping algae and periphyton
• No lungs or gills; absorbs oxygen through the skin and from a projection on the foot

Very Sensitive Somewhat Sensitive Facultative Somewhat Tolerant Very Tolerant

Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.