The genus Astyanax Baird & Girard, 1854 ZBK is diverse and widespread in freshwaters of South America, including at least 86 described species (Lima et al., 2003). Astyanax ZBK is likely a non-monophyletic genus (Weitzman & Malabarba, 1998), and the taxonomic status of some species is not completely clear.
During field expeditions to the rio da Várzea headwaters, a tributary of the upper portions of the rio Iguaçu in Paraná State, Brazil (Fig. 1), a new characid species was collected that presents the morphological features of the A. scabripinnis species complex . This non-monophyletic group, proposed by Moreira-Filho & Bertollo (1991) and subsequently discussed by Bertaco & Malabarba (2001) and Bertaco & Lucena (2006), possesses an elongated body (2.6 to 3.6 body depth in SL), a reduced number of branched anal-fin ray (13 to 21), a tall head region, and body deepest over middle of pectoral fins.
- Vinícius Abilhoa, Luiz Fernando Duboc (2007): A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguacu basin, southeastern Brazil. Zootaxa 1587, 43-52: 43-43, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:B2CDDEA9-F47C-444F-BA47-DB7D7EC8D49A
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