plural noun

Definition of Pleuropterygii

: 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

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History and Etymology for Pleuropterygii

New Latin, from pleur- + -pterygii

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Cite this Entry

“Pleuropterygii.” Dictionary, Merriam-Webster, Accessed 20 Sep. 2020.

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