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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