This crustacean is known from the Strait of Georgia, Canada, to southern California, USA.
In adults, the upper surface of the tail plate lacks symmetrically arranged tubercles.
It burrows into algal holdfasts.
In adults, the left mandible lacks rasp-like ridges.
In adults, the uropods are greatly reduced, with small claw-like outer branches.
An extinction-risk assessment has not been added yet.