- 37 species in North America
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Pulmonata |
| Family: | Physidae |
Identification Tips:
• Sinistral - shell opening is on left when facing toward you with pointed end up
• Lack an operculum (hardened cover that seals the opening)
Life History:
• Physid snails can breathe air
• Mostly found in areas with soft silt bottom
• Often found on submerged vegetation vegetation or on solid objects protruding from the bottom.
| POLLUTION TOLERANCE | ||||
| Very Sensitive | Somewhat Sensitive | Facultative | Somewhat Tolerant | Very Tolerant |
| Most | ||||
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Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.
