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Two new species of Hyphessobrycon (Teleostei: Characidae) from upper rio Tapajós basin on Chapada dos Parecis, central Brazil

2006; Sociedade Brasileira de Ictiologia; Volume: 4; Issue: 3 Linguagem: Inglês

10.1590/s1679-62252006000300001

ISSN

1982-0224

Autores

Tiago Pinto Carvalho, Vinicius de Araújo Bertaco,

Tópico(s)

Fish Ecology and Management Studies

Resumo

Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.

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