Original description as Crenicichla cyclostoma:
- Ploeg, Alex. 1986. "The cichlid genus Crenicichla from the Tocantins River, state of Para, Brazil, with descriptions of four new species (Pisces, Perciformes, Cichlidae)". Beaufortia. v. 36; n. 5; pp. 57-80 (crc00072) (abstract)
Conservation: Crenicichla cyclostoma is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.