propterygium


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propterygium

[‚präp·tə′rij·ē·əm]
(vertebrate zoology)
The anterior of the three principal basal cartilages forming a support of one of the paired fins of sharks, rays, and certain other fishes.
References in periodicals archive ?
In dorsal view, three other elements of the pectoral girdle can be observed: propterygium, mesopterygium and metapterygium.
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.