First zoeal stage of <i>Pachygrapsus crassipes</i> Randall

Abstract

Morphological studies on the first zoea of Pachygrapsus crassipes (Brachyura : Crustacea) have shown structural differences, primarily concerning the presence or absence of lateral spines on the carapace, the structure of the antennae, and the number and position of the setae, as compared with members of the same family and in particular with P. marmoratus