This crustacean is known from the type locality in northern California, USA.
In adult females, the head is fused with the first thoracic segment, with a shallow upper transverse groove behind the eyes.
In the 1948 record from the type locality, it was collected on hydroids in the lower intertidal zone.
Adult females have robust antennae.
In adult females, each of thoracic segments two to seven has a transverse row of four large spines on its rear upper surface.
An extinction-risk assessment has not been added yet.