This crustacean is known from Alaska, USA, to Mexico.
In adults, the eyes are small and situated around the middle of the sides of the head.
It occurs mostly on algae.
In adults, the rear margin of the tail plate is concave, with rounded rear side corners.
In adults, the side plates of thoracic segments five to seven reach the rear margins of their segments.
An extinction-risk assessment has not been added yet.