A NEW SPECIES OF MONSTRILLA (COPEPODA, MONSTRILLOIDA) FROM A COASTAL SYSTEM OF THE BAJA-CALIFORNIA PENINSULA, MEXICO

From plankton samples taken at Puerto Escondido, a Mexican shallow-wat er embayment located in the southern portion of the eastern coast of t he Baja California Peninsula, a new species of Monstrilla, M. gibbosa, is described from a single adult female specimen. Among several disti nctive features on the fifth leg and genital complex, and in the anten nular structure and proportions, the new species can be separated from all other previously known monstrilloids by the presence of two anter ior ventral protuberances on the cephalosome.