Updated 11 May 2025
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Radiicephalus Osório 1917 radii (L.), rays; cephalus, from kephalḗ (Gr. κεφαλή), head, referring to long anterior rays of dorsal fin on upper part of head

Radiicephalus elongatus Osório 1917 Latin for prolonged, referring to its long, compressed body

Radiicephalus kessinger Koeda & Ho 2018 said by the authors to be Latin for scarecrow, referring to its “tattered, ribbon-like body,” but kessinger does not appear in any Latin dictionary