Tuesday, November 6, 2018

[Ichthyology • 2018] Moenkhausia goya • A New Species (Characiformes: Characidae) from the upper rio Tocantins Basin, Central Brazil


Moenkhausia goya 
Carvalho Deprá, Azevedo-Santos, Vitorino, Dagosta, Marinho & Benine, 2018


Abstract
A new species of Moenkhausia is described from the upper rio Tocantins basin, States of Goiás and Tocantins, Brazil. Moenkhausia goya, new species, can be distinguished from its congeners by the shape of the humeral blotch in combination with a uniform dark pigmentation covering the interradial membranes of the dorsal and anal fins. Among congeners, the new species is most similar to M. britskii Azevedo-Santos & Benine, M. grandisquamis (Müller & Troschel) and M. xinguensis Steindachner by presenting a deep body, a large, round humeral blotch and fins without discrete patches of dark pigmentation (i.e., without well-defined blotches or stripes). With the description of M. goya, the number of species endemic to the upper rio Tocantins basin (considered upstream from the mouth of the rio Paranã) is raised to 51. Of these, some are widespread in the upper rio Tocantins basin, while others seem to be restricted to one of its sub-basins.

Keywords: Pisces, Cerrado, Moenkhausia xinguensis, State of Goiás, Taxonomy


FIGURE 3. Live coloration of Moenkhausia goya, LBP 23679, 47.8 mm SL,
Brazil, Goiás, Pirenópolis, rio das Almas basin.

Moenkhausia goya, new species 

Etymology. Moenkhausia goya is named after the Goyá, a South American ethnic group that lived in the central region of Brazil, which resisted to the encroachment of their territories until the 19th century. They also originated the name of the state of Goiás, where most of the distribution of the new species lies.

Gabriel de Carvalho Deprá, Valter M. Azevedo-Santos, Oscar Barroso Júnior Vitorino, Fernando Cesar Paiva Dagosta, Manoela Maria Ferreira Marinho and Ricardo C. Benine. 2018. Moenkhausia goya (Characiformes: Characidae): A New Species from the upper rio Tocantins Basin, Central Brazil. Zootaxa. 4514(1); 87–96.  DOI:  10.11646/zootaxa.4514.1.7

Resumo: Uma nova espécie de Moenkhausia é descrita da bacia do alto rio Tocantins, Estados de Goiás e Tocantins, Brasil. Moenkhausia goya, espécie nova, pode ser distinguida de suas congêneres pela forma da mancha umeral em combinação com uma pigmentação escura uniforme recobrindo as membranas inter-radiais das nadadeiras dorsal e anal. Entre as congêneres, a nova espécie é mais similar a M. britskii Azevedo-Santos & Benine, M. grandisquamis (Müller & Troschel) e M. xinguensis Steindachner por ter um corpo alto, uma mancha umeral grande e redonda e nadadeiras sem áreas de pigmentação escura discretas (i.e., sem manchas ou listras bem definidas). Com a descrição de M. goya, o número de espécies endêmicas à bacia do alto rio Tocantins (considerada à montante da barra do rio Paranã) sobe para 51. Destas, algumas estão amplamente distribuídas na bacia do alto rio Tocantins, enquanto outras parecem estar restritas a uma de suas subbacias.
Palavras-chave: Cerrado, Estado de Goiás, Moenkhausia xinguensis, Taxonomia

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