This crustacean is known from Vancouver Island, Canada, to Mexico.
In adults, the first two basal segments of the antennules remain separate.
It is abundant in mussel beds on rocky shores. At the southern end of its range, it also occurs in mangrove lagoons or estuaries.
In adults, the uropod branches have rounded tips without notches.
In adults, abdominal segments three to five have rows of small tubercles along their hind edges.
An extinction-risk assessment has not been added yet.