versão impressa ISSN 1679-6225
VANEGAS-RIOS, James Anyelo; AZPELICUETA, María de las Mercedes e ORTEGA, Hernán. Chrysobrycon eliasi, new species of stevardiine fish (Characiformes: Characidae) from the río Madre de Dios and upper río Manuripe basins, Peru. Neotrop. ichthyol. [online]. 2011, vol.9, n.4, pp. 731-740. ISSN 1679-6225. http://dx.doi.org/10.1590/S1679-62252011000400004.
Chrysobrycon eliasi is described from several drainages of río Madre de Dios and upper río Manuripe basins, río Madeira basin, Peru. The new species is distinguished from its congeners by the maxillary teeth, which are tricuspidate, bicuspidate and conical, and the terminal lateral-line tube developed between caudal-fin rays 10-11. Other characters that help to recognize C. eliasi are the possession of maxilla with 6-15 (usually 11) teeth occupying more than 70% of the length of the maxilla in adults, predorsal scales 18-22, dorsal-fin to hypural complex length 36.32-41.17% of standard length (SL), gill-gland length in males 3.57-5.05% SL, maxillary length 33.76-38.75% of head length, and branched anal-fin rays 24-30. The discovery of C. eliasi allows us to extend the geographic distribution of the genus to the southeast, into the río Madeira basin.
Palavras-chave : Madeira basin; Pouch scale; Sexual dimorphism; Tambopata; Xenurobryconini.