Onychodus (/ɒˈnɪkədəs/, from Greek meaning "claw-tooth") is a genus of prehistoric lobe-finned fish which lived during the Devonian period (Eifelian - Famennian stages, around 374 to 397 million years ago). It is one of the best known of the group of onychodontiform fishes. Scattered fossil bones of Onychodus were first discovered in 1857, in North America, and described by John Strong Newberry. Other species were found in Australia, England, Norway and Germany showing that it had a widespread range.