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- Kingdom - Animals - Animalia
  - Phylum - Mollusks - Mollusca
    - Class - Snails / Slugs - Gastropoda
      - Order - Aquatic Snails - Basommatophora
        
        Family - Ancylids - Ancylidae
        
        Species - Fragile Ancylid - Ferrissia californica

Fragile Ancylid - Ferrissia californica

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Native Species

Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:

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General Description

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).

Range Comments

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: 25

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Relative Density

Recency

(Observations spanning multiple months or years are excluded from time charts)

Habitat

Although it can occur in rivers, it is more commonly found on macrophytes and organic debris in lentic environments (McMahon 1976 and Jokinen 1978).

References

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.
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Citation for data on this website:
Fragile Ancylid — Ferrissia californica. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 26, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IMGASN3080