Ontogeny of major chela (pereopod 1) structure from a typical chela to a subchela in Cinetorhynchus species A and B. The length of the propodal finger relative to propodal length (cheliped size) is plotted as the measure of chela structure. With growth, the relative propodal (fixed) finger length decreases in larger males but not in females as male first chelipeds change from chelate to subchelate (see Figure 7). A Cinetorhynchus sp. A B Cinetorhynchus sp. B.