Original description as Phallichthys fairweatheri:
- Rosen, Donn E & R.M. Bailey. 1959. "Middle-American poeciliid fishes of the genera Carlhubbsia and Phallichthys with descriptions of two new species". Zoologica, Scientific Contributions of the New York Zoological Society. v. 44(n. 1), pp. 1-44 (ffm04593)
Conservation: Phallichthys fairweatheri is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.