This crustacean is known from western North America, Mexico, and East Asia.
In adult females, the body is distinctly segmented, with clear divisions between head, thorax and abdomen.
It parasitizes the gills of Callianassa and Neotrypaea shrimps in the eastern Pacific, and Nihonotrypaea and Upogebia in Asia.
In adult females, the elongated abdominal side plates are fringed with long, branched projections.
The female body length summarized in this source reaches approximately 12 mm.
An extinction-risk assessment has not been added yet.