Original description as Cichlosoma (Parapetenia) ornatum:
- Regan, Charles Tate. 1905. "A revision of the fishes of the American cichlid genus Cichlosoma and of the allied genera". Annals and Magazine of Natural History. (Ser. 7) vol. 16; pp 60-77; 225-243; 316-340; 433-445 (crc00042)
Conservation: Mesoheros ornatus is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2016).