Appearance
"Leptoxis carinata" has a strong globose shell, with highly variable sculpture. In various creeks and rivers throughout its range, populations may be found with spiral cords, a single carina or keel, variously developed, or lacking sculpture.Behavior
"Leptoxis carinata" is semelparous biennial.This species, unlike softer shelled physid snails, grows very slowly, and has the lowest intrinsic rate of increase, along with "Elimia virginica", in this environment.
Habitat
"Leptoxis carinata" is found in high-gradient streams, generally in the faster flowing riffles and drops, where it clings firmly to large stones and bedrock exposures.References:
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