Petalodontidae

plural noun

Pet·​al·​o·​don·​ti·​dae

: a family of Carboniferous and Permian elasmobranchs (subclass Holocephali) related to the rays and having peculiar flattened petaloid teeth and greatly enlarged pectoral fins see petalodus

Word History

Etymology

New Latin, from Petalodont-, Petalodus, type genus + -idae

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