This crustacean is known from British Columbia, Canada, to Mexico.
In adults, the upper body is rough, with low, rounded tubercles.
It occurs beneath stones, driftwood, decaying eelgrass and other debris along the high-tide line of marshes, bays and estuaries, and in the spray zone of rocky beaches.
In adults, the hind edges of the body segments are smooth.
In adults, the fourth basal antennal segment lacks a spur-like process on its outer margin.
An extinction-risk assessment has not been added yet.