Intertidal chitons (Mollusca: Polyplacophora) from the rocky coastline of Guerrero, Mxico, with the description of a new species.

Chitons from southern Mxico have been poorly documented hitherto and little is known about the species present in this region. Here we report 12 intertidal to shallow subtidal species in six families and nine genera. Chiton articulatus, Chiton albolineatus, and Ischnochiton muscarius were numerically the most common species, accounting for 29%, 27%, and 26% of individuals found, followed by Chaetopleura lurida (7%) and Stenoplax limaciformis (3%).