Considerado un sinónimo menor de Profundulus punctatus (Günther, 1866)
- Lazara, K.J. 2001. "The killifishes, an annotated checklist, synonymy, and bibliography of recent oviparous Cyprinodontiform fishes". The killifish master index. 4:1-624 (ffm00080)
Descripción original como Fundulus pachycephalus:
- Günther, Albert C. L. G. 1866. "Catalogue of the Physostomi, containing the families Salmonidae, Percopsidae, Galaxidae, Mormyridae, Gymnarchidae, Esocidae, Umbridae, Scombresocidae, Cyprinodontidae, in the collection of the British Museum". Catalogue of the fishes in the British Museum. 6:1-368 (ffm04521)