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, the pectoral girdle has three more elements: the propterygium, mesopterygium and metapterygium, the more variable of which is the mesopterygium articulating the other two.
The propterygium (PPG) is tubular and rectilinear in shape, and extends to the level of suprascapula (Figure 1).
The propterygium of electric rays is elongated and accommodates the electric organ (Claeson 2014).