Original description as Poeciliopsis monacha:
- Miller, Robert Rush. 1960. "Four new species of viviparous fishes, genus Poeciliopsis, from northwestern Mexico". Occasional Papers of the Museum of Zoology, University of Michigan. (n. 619), pp. 1-11 (ffm00030)
Conservation: Poeciliopsis monacha is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.