plural noun
Hol·op·ty·chi·idae | \ˌhäləptəˈkīəˌdē, ˌhōl-\

Definition of Holoptychiidae 

: a family of Devonian fishes (order Rhipidistia) having unossified vertebrae, teeth of complicated structure, and the body covered with imbricating cycloid enameled scales

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History and Etymology for Holoptychiidae

New Latin, from Holoptychius, type genus + -idae

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