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COSEWIC assessment and status report on the Rocky mountain ridged mussel Gonidea angulata in Canada

Assessment Summary


Assessment Summary – November 2003

Common name: Rocky Mountain Ridged Mussel

Scientific name: Gonidea angulata

Status: Special Concern

Reason for designation: The distribution of this species is limited to southern British Columbia in the Okanagan and Kootenay River systems.  This species has likely been impacted by the damming of the Kootenay, Columbia and Okanagan Rivers and the channelization of the Okanagan River and resulted in loss of alteration of the mussel's habitat quality and extent.

Occurrence: British Columbia

Status history: Designated Special Concern in November 2003.  Assessment based on a new status report.