This crustacean is known from British Columbia, Canada, to Mexico.
In adult females, the head is slightly wider than long, two-lobed and eyeless.
It parasitizes the abdomen of the mud shrimps Upogebia lepta, Upogebia macginitieorum and Upogebia pugettensis.
In adult females, the first abdominal segment has a pair of small papilla-like projections on its upper sides.
In adult females, the long, narrow, two-branched abdominal appendages arise from slender stalks, and lateral abdominal plates are absent.
An extinction-risk assessment has not been added yet.