This crustacean is known from northern California, USA, to Mexico.
In adult males, the tail plate is approximately half as long as the thorax.
It is known from sandy mud, pilings in bays and mussel beds, among other habitats.
In adult males, a large upper tubercle occurs at the base of the tail-plate notch.
In adult males, the uropods lack spines.
An extinction-risk assessment has not been added yet.