Pleuropterygii

plural noun

Pleu·​rop·​ter·​yg·​ii

: a subclass or order of small primitive Devonian elasmobranchs including the genus Cladoselache in which the paired fins are supported by unjointed parallel radial cartilages extending straight outward to the fin membrane and claspers are locking

Word History

Etymology

New Latin, from pleur- + -pterygii

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