This crustacean is known from Alaska, USA, to Mexico.
In adults, the rear edge of the tail plate is deeply concave, with pointed rear side corners.
It frequently occurs in kelp and eelgrass beds.
In adults, the maxillipedal palp has five segments, with the last much smaller than the preceding segment.
In adults, the head is distinct from the first thoracic segment.
An extinction-risk assessment has not been added yet.