Original description as Gambusia amistadensis:
- Peden, Alex E. 1973. "Virtual extinction of Gambusia amistadensis n. sp., a poeciliid fish from Texas". Copeia. 1973(2):210-221 (ffm04563)
Conservation: Gambusia amistadensis is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species. Reported extinct in 1973 by Burkhead (2012).