Simpsonichthys marginatus is a species of killifish from the family Rivulidae. It is found in the São Francisco River basin, Brazil.
Description
Simpsonichthys marginatus reaches a standard length of .
References
- Costa, W.J.E.M., 2003. Rivulidae (South American Annual Fishes). p. 526-548. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.