- 11 species in North America
• Shell shaped like a long flattened cone
• 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.