This crustacean is known from China, Japan, and western North America.
In adult females, the body is broadly oval and nearly as wide as long.
It parasitizes the gills of the mud shrimps Upogebia pugettensis and Upogebia macginitieorum.
In adult females, the nearly square head is deeply embedded in the first thoracic segment.
In adult females, the underside of the abdomen is covered by overlapping lance-shaped side plates and single-branched uropods.
An extinction-risk assessment has not been added yet.