Original reference in Xiphophorus sp. 'regio':
- Coletti, Ted. 2010. "The northern platies… and a new species?". Tropical Fish Hobbyist Magazine. 58(3):32-34 (ffm01225)
Conservation: Xiphophorus sp. 'regio' is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.