Dinopteryx ("terrible wing") is an extinct genus of prehistoric beardfish from the Late Cretaceous period.[2] It contains a single species, D. spinosus, known from the Santonian of Lebanon (Sahel Alma).[1] It is the only member of the extinct family Dinopterygidae, which is considered a distinct family of the Polymixiiformes.[3][4] It was previously placed in the genus Hoplopteryx.[5][6]