Simpsonichthys

Simpsonichthys is a genus of killifish from the family Rivulidae the species of which are endemic to temporary freshwater habitats like ponds in the upper Paraná, upper Araguaia, upper Jequitinhonha and São Francisco basins on the central Brazilian Plateau. They are small annual killifish that reach up to in standard length.

==Species== thumb|Simpsonichthys boitonei As delineated by Fishbase the following species are included within the genus Simpsonichthys: Simpsonichthys alternatus (W. J. E. M. Costa & G. C. Brasil, 1994) Simpsonichthys boitonei A. L. de Carvalho, 1959 (Lyrefin pearlfish) Simpsonichthys bokermanni (Carvalho, da & Cruz, 1987) Simpsonichthys cholopteryx W. J. E. M. Costa, C. L. R. Moreira & F. C. T. Lima, 2003 Simpsonichthys constanciae (G. S. Myers), 1942 (Featherfin pearlfish) Simpsonichthys delucai Costa, 2003 Simpsonichthys espinhacensis Nielsen, Pessali & Dutra, 2017 Simpsonichthys fasciatus Costa & Brasil, 2006 Simpsonichthys gibberatus Costa & Brasil, 2006 Simpsonichthys margaritatus Costa, 2012 Simpsonichthys marginatus Costa & Brasil, 1996 Simpsonichthys multiradiatus Costa & Brasil, 1994 Simpsonichthys nielseni Costa, 2005 Simpsonichthys nigromaculatus Costa, 2007 Simpsonichthys ocellatus Costa, Nielsen & de Luca 2001 Simpsonichthys parallelus Costa, 2000 Simpsonichthys perpendicularis Costa, Nielsen, de & Luca, 2001 Simpsonichthys punctulatus Costa & Brasil, 2007 Simpsonichthys rosaceus Costa, Nielsen, de & Luca, 2001 Simpsonichthys rufus Costa, Nielsen, de & Luca, 2001 Simpsonichthys santanae (Shibatta & Garavello, 1992) Simpsonichthys similis Costa & Hellner, 1999 Simpsonichthys stellatus (Costa & Brasil, 1994) Simpsonichthys suzarti Costa, 2004 Simpsonichthys trilineatus (Costa & Brasil, 1994) Simpsonichthys virgulatus (Costa & Brasil, 2006) Simpsonichthys zonatus (Costa & Brasil, 1990)