Original description as Crenicichla santosi:
- Ploeg, Alex. 1991. "Revision of the South American cichlid genus Crenicichla Heckel, 1840, with description of fifteen new species and consideration on species groups, phylogeny and biogeography (Pisces, Perciformes, Cichlidae).". Univ. Amsterdam, Netherlands. pp. 1-153 (crc01043)
Conservation: Crenicichla santosi is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.