Cumella (Cumewingia) quintinensis sp. nov. (Cumacea: Nannastacidae) from Bahia de San Quintin, Baja California, Mexico

摘要

A new species of Cumacea, Cumella (Cumewingia) quintinensis sp. nov. from Bahia de San Quintin, Baja California, Mexico, is here described. C. (C.) quintinensis can be distinguished from other species of Cumella by having: (1) a smooth carapace, (2) indistinct notch, (3) peduncles longer than last abdominal segment and subequal rami, (4) uropodal exopod with distal spine longer than the one in endopod. C. (C.) quintinensis was found in stations largely exposed during the low tide and densely covered by the sea grass Zostera, as well as in very fine sediments. Its presence in Bahia de los Angeles, Baja California, mainly in sandy sediments, is also reported. Two other species, Oxyurostylis pacifica Zimmer, 1936 and Oxyurostylis tertia Zimmer, 1943, previously reported for Bahia de los Angeles, were also found in Bahia de San Quintin.