First described species of Costacopluma (Crustacea: Brachyura: Retroplumidae) from the Pacific slope, Paleocene of California, USA

Resumen

A new species of the
brachyuran crab Costacopluma Collins and Morris, 1975, Costacopluma
squiresi, is described from lower Paleocene strata of the San
Francisquito Formation and upper Paleocene strata of the Santa
Susana Formation of southern California. Costacopluma squiresi
represents the first described species of Costacopluma from the
Pacific Coast of North America.