Fragile Ancylid - Ferrissia fragilis
Ferrissia fragilis is a species of small freshwater snail or limpet, an aquatic gastropod mollusk in the family Planorbidae. They are small and conical shaped. Although this species can occur in rivers, it is more commonly found on macrophytes and organic debris in lentic environments (McMahon 1976 and Jokinen 1978).
Currently known from the Seeley Lake chain of lakes, but will probably increase its MT range with more surveys.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Although it can occur in rivers, it is more commonly found on macrophytes and organic debris in lentic environments (McMahon 1976 and Jokinen 1978).
- Literature Cited AboveLegend: View Online Publication
- Jokinen, E.H. 1978. The aestivation pattern of a population of Lymnaea elodes (Say) (Gastropoda: Lymnaeidae). American Midland Naturalist, 100(1): 9-19.
- McMahon, R. 1976. Growth, reproduction, and life cycle in six Texan populations of two species of fresh-water limpets. American Midland Naturalist 95:174-185.
- Additional Sources of Information Related to "Snails / Slugs"