Chaetodon Linnaeus, 1758 "Citharoedus" Kaup, 1860 (non Herrmannsen, 1847: preoccupied) Corallochaetodon Burgess, 1978 Discochaetodon Nalbant, 1971 Exornator Nalbant, 1971 Gonochaetodon Bleeker, 1876 Lepidochaetodon Bleeker, 1876 Megaprotodon Guichenot, 1848 Rabdophorus Swainson, 1839 Rhombochaetodon Burgess, 1978 (disputed) Tetrachaetodon Weber & Beaufort, 1936 and see text Chaetodon is a tropical fish genus in the family Chaetodontidae.These could use the names Lepidochaetodon, Megaprotodon and Rabdophorus, and there is one unnamed group containing the three-banded butterflyfish (C. robustus) and its relatives.[6] Historically, more distantly related fish were placed in Chaetodon too, for resembling them in details – e.g. the common scat Scatophagus argus, which has a similar shape and size, as well as armored larvae like the Chaetodontidae – or simply because they are colorful, smallish, and unusual-looking – e.g. the quite unrelated paradise fish, as C. chinensis.The fossil record of this family is scant indeed, only Chelmon (or some similar genus like Chelmonops or Coradion) being known from Miocene remains.As even crude molecular clocks suggest that the ancestors of the Chaetodon and the Chelmops lineage diverged in the Late Eocene already, nothing more can be said without new fossils being discovered.