- 44 species in North America
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Pulmonata (Subclass) |
| Family: | Planorbidae |
Identification Tips:
• Shell is coiled flat, not spiraled
• No operculum
• Body often reddish, and visible through thin shell
• 3-30 mm diameter
Life History:
• Most found on soft, silty bottom, but also on protruding objects
• Have hemoglobin in blood and can tolerate low oxygen conditions
| POLLUTION TOLERANCE | ||||
| Very Sensitive | Somewhat Sensitive | Facultative | Somewhat Tolerant | Very Tolerant |
| Most | Some | |||
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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.
