Descriptive morphology and phylogenetic relationships among species of the Neotropical annual killifish genera Nematolebias and Simpsonichthys (Cyprinodontiformes: Aplocheiloidei: Rivulidae) Author Costa, Wilson J. E. M. text Neotropical Ichthyology 2006 2006-03-31 4 1 1 26 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100001&lng=en&tlng=en journal article 10.1590/S1679-62252006000100001 1982-0224 5418203 Subgenus Simpsonichthys de Carvalho , new usage Diagnosis. Distinguished from all other cynolebiatins by having flank red with bright blue bars on the anterior portion and vertical rows of blue dots on the posterior portion in males (a condition modified in S. cholopteryx , in which there are blue bars on the entire flank). Included species. Simpsonichthys marginatus Costa & Brasil , S. zonatus (Costa & Brasil ), S. santanae (Shibata & Garavello) , S. boitonei de Carvalho , S. parallelus Costa , and S. cholopteryx Costa, Moreira & Lima. Distribution. Headwaters of rio Paraná , rio São Francisco and rio Araguaia basins, central Brazil .