How to Distinguish from Similar Species: Slipper shells such as Crepidula adunca have a septum inside but the shells are more flattened, and the septum also is mostly flat rather than spiral. The shells of chinese cap limpet Acmaea mitra has a similar shell shape but no septum inside and usually has steeper sides and a higher apex..
Geographical Range: Alaska to California
Depth Range: Occasionally intertidal, mostly subtidal at 18 to 137 m
Habitat: Attached to rocks, dead shells, or sometimes to crabs
History: As with other
slipper shells, this species is a filter feeder with special gills.
Kozloff 1987, 1996
General Notes and Observations: Locations, abundances, unusual behaviors:
Authors and Editors of Page:
Dave Cowles (2005): Created original page