Dear Alastair and colleagues,
Nereis caudata includes N. acuminata. However, Nereis arenaceodentata
Moore 1909 is a (very) different biological species. Please enjoy reading
Weinberg et al. (1990 Marine Biology 107:205-213); you will notice that
these two species have a very similar morphology but they are
reproductively isolated and their chromosome number is 2n=22 for N.
caudata while N. arenaceodentata is 2n=18. This geographic identification
of similar animals is also present in Diadema echinoids from each side of
Panama; being D. mexicana the Pacific form while it is D. antillarum the
Western Atlantic one. We should keep apart the two names of polychaetes.
La Ciencia del Tercer Mundo no está perdida, sino ignorada.
Third World Science is not lost (Sci. Amer. Aug. 1995:76),
Sergio I. Salazar-Vallejo
Depto. Ecología Acuática
ECOSUR, Apdo. Postal 424
Chetumal QR 77000 MEXICO
salazar at ecosur-qroo.mx
Tel. (983) 20115, 21666
Fax (983) 20447
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