This crustacean is known from British Columbia, Canada, to Mexico.
In adults, the rear of the tail plate has a long central projection.
It occurs in various intertidal habitats, including encrusting red algae on the surfgrass Phyllospadix.
In adults, the sides of the first thoracic segment are convex.
In adults, the eyes are circular to oval.
An extinction-risk assessment has not been added yet.