In dorsal view, three other elements of the pectoral girdle can be observed: propterygium, mesopterygium and metapterygium. The propterygium is anteriorly articulated with anterorbital cartilages.
In dorsal view, the pectoral girdle has three more elements: the propterygium, mesopterygium and metapterygium, the more variable of which is the mesopterygium articulating the other two.
Porbeagles, postnatal shortfin makos, and Sanzo's embryo all have an unsegmented metapterygium
in their pectoral fin skeletons, whereas white sharks have a transversely segmented basal metapterygium
(Compagno and Gottfried, unpubl, data).