This crustacean is known from Alaska, USA, to Mexico.
In adults, the rear of the tail plate has a small or poorly developed central projection, sometimes appearing slightly truncate.
It is common on surfgrass of the genus Phyllospadix in shallow waters.
In adults, the sides of the first thoracic segment are barely rounded and almost parallel.
In adults, the eyes have straight front borders and convex rear borders.
An extinction-risk assessment has not been added yet.