This crustacean is known from central California, USA, to central Mexico.
In adult females, the body is pear-shaped and approximately twice as long as wide.
It parasitizes the gills of the pelagic squat lobster Pleuroncodes planipes.
In adult females, the head is slightly wider than long and lacks eyes.
In adult females, the thoracic side plates are very large, overlap, and extend well beyond the segment sides.
An extinction-risk assessment has not been added yet.