A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Author(s)

Marina Barreira Mendonça ^[1] ; Luiz Antônio Wanderley Peixoto ^[2] ; Guilherme Moreira Dutra ; André Luiz Netto-Ferreira ^[4]

Affiliation

^[1] Museu Paraense Emílio Goeldi - Brasil

^[2] Universidade de São Paulo. Museu de Zoologia - Brasil

^[4] Museu Paraense Emílio Goeldi - Brasil

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 14, n. 1 2016-03-30.

Abstract

Abstract A new species of Xenurobrycon isdescribed from tributaries of the rio Tapajós, Pará, Brazil. It is diagnosed from all congeners by the dark color of the posterior half of both caudal-fin lobes, the presence of infraorbitals one, two, and three, the presence of a set of lamellar processes on eighth principal caudal-fin ray of mature males, the presence of bony hooks similar in size or decreasing posteriorly on last unbranched and first 9-12 branched anal-fin rays of mature males, the presence of only conical teeth on both jaws, the lack of the adipose fin and the presence of 15-18 predorsal scales. The description of the new species increases the number of species in Xenurobrycon to six. An updated key to the species of the genus is provided. (AU)

• FAPESP's process: 11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America
• Grantee: Naercio Aquino Menezes
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 13/09926-3 - Taxonomic and phylogenetic implications in facial myology compared in Gymnotiformes and Siluriformes
• Grantee: Luiz Antonio Wanderley Peixoto
• Support Opportunities: Scholarships in Brazil - Doctorate