Hexanchidae

plural noun
Hex·an·chi·dae | \hekˈsaŋkəˌdē\

Definition of Hexanchidae 

: a family of sharks consisting of many fossil forms and a few living forms that have one dorsal fin and a palatoquadrate which articulates with the postorbital part of the skull

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History and Etymology for Hexanchidae

New Latin, from Hexanchus, type genus + -idae

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