Cynolebias

Cynolebias is a genus of freshwater annual killifish in the family Rivulidae. They are endemic to northeastern Brazil, generally in temporary waters such as ponds in the Caatinga and adjacent regions. By far the highest species richness is in the São Francisco River basin, but there are also species east and north of this system, and west as far as the Tocantins River basin. Many species have rather small distributions and some are highly threatened.
They are small thickset fish, up to in total length depending on the exact species.

Species

The currently recognized species in this genus are:Cynolebias albipunctatus W. J. E. M. Costa & G. C. Brasil, 1991Cynolebias altus W. J. E. M. Costa, 2001Cynolebias attenuatus W. J. E. M. Costa, 2001Cynolebias gibbus W. J. E. M. Costa, 2001Cynolebias gilbertoi W. J. E. M. Costa, 1998Cynolebias griseus W. J. E. M. Costa, Lacerda & G. C. Brasil, 1990Cynolebias itapicuruensis W. J. E. M. Costa, 2001Cynolebias leptocephalus W. J. E. M. Costa & G. C. Brasil, 1993Cynolebias microphthalmus W. J. E. M. Costa & G. C. Brasil, 1995Cynolebias obscurus W. J. E. M. Costa, 2014Cynolebias ochraceus W. J. E. M. Costa, 2014Cynolebias oticus W. J. E. M. Costa, 2014Cynolebias paraguassuensis W. J. E. M. Costa, Suzart & D. T. B. Nielsen, 2007Cynolebias parietalis W. J. E. M. Costa, 2014Cynolebias parnaibensis W. J. E. M. Costa, T. P. A. Ramos, Alexandre & R. T. C. Ramos, 2010Cynolebias perforatus W. J. E. M. Costa & G. C. Brasil, 1991Cynolebias porosus Steindachner, 1876Cynolebias rectiventer W. J. E. M. Costa, 2014Cynolebias roseus W. J. E. M. Costa, 2014Cynolebias vazabarrisensis W. J. E. M. Costa, 2001