Original description as Xiphophorus montezumae cortezi:
ZooBank:AEC1709A-9681-4698-820C-6DDB98EFAE20.
- Rosen, Donn E. 1960. "Middle-American poeciliid fishes of the genus Xiphophorus". Bulletin of the Florida State Museum, Biological Sciences. 5(4):57-242 (ffm00047)
Conservation: Xiphophorus cortezi is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (2018).