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vol.8 número1Pareiorhaphis scutula, a new species of neoplecostomine catfish (Siluriformes: Loricariidae) from the upper rio Doce basin, Southeastern BrazilColor pattern variation in Trichomycterus iheringi (Eigenmann, 1917) (Siluriformes: Trichomycteridae) from rio Itatinga and rio Claro, São Paulo, Brazil índice de autoresíndice de assuntospesquisa de artigos
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Neotropical Ichthyology

versão impressa ISSN 1679-6225

Resumo

CARVALHO, Pedro Hollanda; LIMA, Flávio C.T  e  ZAWADZKI, Cláudio H. Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae) from the rio Negro basin in Brazil. Neotrop. ichthyol. [online]. 2010, vol.8, n.1, pp.39-48. ISSN 1679-6225.  https://doi.org/10.1590/S1679-62252010000100006.

Two new species of Hypostomus are described from the middle and upper rio Negro in Brazil. They are assigned to the Hypostomus cochliodon group (sensu Armbruster, 2003) by possessing few spoon-shaped teeth, and dentary angle averaging less than 80º. Hypostomus kopeyaka is described from the rio Tiquié, a tributary of the rio Uaupés, upper rio Negro basin, presents a unique color pattern among the Hypostomus species belonging to the Hypostomus cochliodon group, consisting of conspicuously horizontally elongated, closely-set black spots over the entire dorsal and lateral surfaces of the body. Hypostomus weberi is described from the middle rio Negro and can be distinguished from all remaining Hypostomus species belonging to the Hypostomus cochliodon group by possessing a unique color pattern consisting in large, rounded, widelyspaced black spots over body and fins.

Palavras-chave : Hypostomus kopeyaka; Hypostomus weberi; Hypostomus micromaculatus; Rio Tiquié; Amazon basin.

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