Original description as Cichlasoma pasionis:
- Rivas, Luis Rene. 1962. "Cichlasoma pasionis, a new species of cichlid fish of the Thorichthys group, from the Rio de la Pasion, Guatemala". Quarterly Journal of the Florida Academy of Science. 25 (2); pp. 147-156 (ffm00275)
Conservation: Thorichthys pasionis is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species. Not listed in the Mexican Official Norm NOM-059-ECOL-2001 with any degree of protection. Although faced with pollution in part of its range, most of it remains relatively stable.