Original description as Xiphophorus montezumae:
- Jordan, David Starr & J. O. Snyder. 1899. "Notes on a collection of fishes from the rivers of Mexico, with description of twenty new species". Bulletin of the U.S. Fish Commission. 19: 115-147 (ffm00041)
Conservation: Xiphophorus montezumae is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (2018).