Gonidea
Gonidea angulata, the western ridged mussel or Rocky Mountain ridged mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. It is the only species in the genus Gonidea.Description
Shell is 125 mm long, 65 mm high, 40 mm wide.This species is found in the Pacific Northwest.
In Canada, it lives in British Columbia, where the Committee on the Status of Endangered Wildlife in Canada has listed it as a species of special concern. The Canadian Species at Risk Act listed it in the List of Wildlife Species at Risk as being a species of special concern in Canada in 2003, and as endangered in 2010.
