Phylogeography and karyotypic evolution of some Deuterodon species from southeastern Brazil (Characiformes, Characidae, Stethaprioninae)

Deuterodon is a genus of the subfamily Stethaprioninae, group Neotropical fish known as tetras. hastatus represents species complex, which supported by cytogenetic and molecular data. In this study, we show results comparative evolutionary analyses ATP synthase subunit 6 gene in four species, addition to ribosomal markers (18S rDNA 5S rDNA), new population D. complex from Angra dos Reis/RJ region. The study comprised cytotype, refer cytotype D, hastatus, with 2n = 50 6M+8SM+8ST+28A. We obtained three different clades our phylogeny, one them composed only specimens By using clock dating, observed that radiation southeastern Brazil seemed be associated neotectonic events occurred during Miocene-Pliocene Pliocene-Pleistocene transitions, marked capture headwater streams marine transgressions. reinforce idea at least significant units were identified group.