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
As delineated by Fishbase the following species are included within the genus Simpsonichthys:Simpsonichthys alternatus Simpsonichthys boitonei A. L. de Carvalho, 1959 Simpsonichthys bokermanni Simpsonichthys cholopteryx Wilson [José Eduardo Moreira da Costa|W. J. E. M. Costa], C. L. R. Moreira & F. C. T. Lima, 2003Simpsonichthys constanciae, 1942 Simpsonichthys delucai Costa, 2003Simpsonichthys espinhacensis Nielsen, Pessali & Dutra, 2017Simpsonichthys fasciatus Costa & Brasil, 2006Simpsonichthys gibberatus Costa & Brasil, 2006Simpsonichthys margaritatus Costa, 2012Simpsonichthys marginatus Costa & Brasil, 1996Simpsonichthys multiradiatus Costa & Brasil, 1994Simpsonichthys nielseni Costa, 2005Simpsonichthys nigromaculatus Costa, 2007Simpsonichthys ocellatus Costa, Nielsen & de Luca 2001Simpsonichthys parallelus Costa, 2000Simpsonichthys perpendicularis Costa, Nielsen, de & Luca, 2001Simpsonichthys punctulatus Costa & Brasil, 2007Simpsonichthys rosaceus Costa, Nielsen, de & Luca, 2001 Simpsonichthys rufus Costa, Nielsen, de & Luca, 2001Simpsonichthys santanae Simpsonichthys similis Costa & Hellner, 1999Simpsonichthys stellatus Simpsonichthys suzarti ''Costa, 2004Simpsonichthys trilineatus Simpsonichthys virgulatus Simpsonichthys zonatusSimpsonichthys sensu lato was formerly one of the larger genera in the family, but four former subgenera were elevated to full genera in 2010: Hypsolebias, Ophthalmolebias, Spectrolebias and Xenurolebias. Some uncertainty remains, with one genetic study supporting them, while another genetic study indicates that Simpsonichthys, Hypsolebias and Spectrolebias are not monophyletic.
With these as separate genera, there are currently 9 recognized species in Simpsonichthys:Simpsonichthys boitonei Simpsonichthys cholopteryxSimpsonichthys espinhacensisSimpsonichthys margaritatus Simpsonichthys nigromaculatusSimpsonichthys parallelusSimpsonichthys punctulatusSimpsonichthys santanaeSimpsonichthys 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''.