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Pisidium variabile Prime, 1852
Triangular Peaclam
Family: Sphaeriidae


© Ian Gardiner     (Photo ID #118135)


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Distribution of Pisidium variabile in British Columbia in British Columbia


Pisidium variabile is endemic to North America, and is widely distributed apart from the far north and far south. It appears to be absent from Alaska, Yukon, and the northwest of British Columbia (Mackie, 2007).

This species is relatively common (Mackie, 2007), is found in virtually all perennial-water habitats (Clarke, 1981), but is usually found in still water where soft sediments accumulate (Herrington, 1962).

Note Author: Ian Gardiner

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
NativeS5YellowNot Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

Additional Range and Status Information Links

Species References

Clarke, A.H. 1981. The freshwater molluscs of Canada. National Museum of Natural Sciences, National Museums of Canada, Ottawa, Ontario: 446pp.

Herrington, H.B. 1962. A revision of the Sphaeriidae of North America (Mollusca: Pelecypoda). Miscellaneous Publications, Museum of Zoology, University of Michigan, No. 118: 74pp, 7 plates.

Mackie, G.L. 2007. Biology of freshwater corbiculid and sphaeriid clams of North America. Ohio Biological Survey Bulletin New Series. Vol XV No. 3: ix + 436pp.