This crustacean is known from the Strait of Georgia, Canada, to southern California, USA.
In adult males, the lateral abdominal projections are doubled, with upper and lower parts.
It has been collected from polychaete worm tubes and benthic sediments.
In adult males, the tail plate is arrowhead-shaped.
In adult males, numerous setae are scattered over the body, but it is not densely hairy.
An extinction-risk assessment has not been added yet.