With these as separate genera, there are currently 9 recognized species in Simpsonichthys:
Simpsonichthys boitonei
Simpsonichthys cholopteryx
Simpsonichthys espinhacensis
Simpsonichthys margaritatus
Simpsonichthys nigromaculatus
Simpsonichthys parallelus
Simpsonichthys punctulatus
Simpsonichthys santanae
Simpsonichthys zonatus
The name of this genus is a compound of the name of a friend of Antenor Leitão de Carvalho's, Charles J. Simpson of San Francisco, and the Greek for fish, ichthys.
↑Berois, N.; G. García; R.O. de Sá, eds. (2015). Annual Fishes: Life History Strategy, Diversity, and Evolution. CRC Press. p.24. ISBN978-1-4822-9971-7.
↑Costa, W.J.E.M.; P.F. Amorim; J.L.O. Mattos; A.L. Alves (2017). "Molecular phylogeny and timing of diversification in South American Cynolebiini seasonal killifishes". Mol Phylogenet Evol. 116: 61–68. Bibcode:2017MolPE.116...61C. doi:10.1016/j.ympev.2017.07.020. PMID28754241.
↑Ponzetto, J.M.; R. Britzke; D.T.B. Nielsen; P.P. Parise-Maltempi; A.L. Alves (2016). "Phylogenetic relationships of Simpsonichthys subgenera (Cyprinodontiformes, Rivulidae), including a proposal for a new genus". Zoologica Scripta. 45 (4): 394–406. doi:10.1111/zsc.12159. S2CID86027315.
↑Christopher Scharpf; Kenneth J. Lazara (5 September 2019). "Order CYPRINODONTIFORMES: Family RIVULIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 16 September 2019.