ON MONSTRILLA-SPINOSA PARK, 1967 (COPEPODA, MONSTRILLOIDA) IN THE EASTERN PACIFIC

The monstrilloid copepod Monstrilla spinosa was only known from one co ld temperate site in the Northwestern Pacific (Aleutian-Oregonian Prov ince),and has not been directly observed since its original descriptio n in 1967. This species was found in Bahia de Todos Santos, Baja Calif ornia, Mexico, a new locality for the species in the Pacific warm temp erate zone (Californian Province). The specimens (three females) diffe r from the type material in total length, antennular relative length, and cuticular ornamentation. Zoogeographical considerations are made w ith the available data on the distribution of the species.