Original description as Poeciliopsis hnilickai:
- Meyer, Manfred & D. Vogel. 1981. "Ein neuer Poeciliopsis aus Chiapas, Mexico (Pisces: Poeciliidae)". Senckenbergiana biologica. 61(5-6):357-361 (ffm00029) (abstract)
Conservation: Poeciliopsis hnilickai is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018). Poeciliopsis hnilickaiis potentially threatened in the Mezcalapa River by anthropogenic activities including deforestation in upper portions of the basin and dam construction, however, this species appears locally abundant and there are no major threats confirmed to be impacting it directly (Matamoros, 2019).