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Melanorivulus-polychromus

22-2_Melanorivulus polychromus

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Volume 22, Issue 2 – 18 April 2016

Dalton Tavares Bressane Nielsen, Pedro Alvaro Barbosa Aguiar Neves, Eric Venturini Ywamoto and Michel de Aguiar Passos: Melanorivulus polychromus, a new species of killifish from the rio São José dos Dourados drainage, middle rio Paraná basin, southwestern Brazil, with a redescription of Melanorivulus apiamici (Cyprinodontiformes: Rivulidae), pp. 79-88

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SINGLE PAPER

Volume 22, Issue 2 – 18 April 2016

Dalton Tavares Bressane Nielsen, Pedro Alvaro Barbosa Aguiar Neves, Eric Venturini Ywamoto and Michel de Aguiar Passos: Melanorivulus polychromus, a new species of killifish from the rio São José dos Dourados drainage, middle rio Paraná basin, southwestern Brazil, with a redescription of Melanorivulus apiamici (Cyprinodontiformes: Rivulidae), pp. 79-88

Abstract
A new species of Melanorivulus is described from the middle rio Paraná basin, São Paulo state, Brazil. Melanorivulus polychromus, new species, is found in a tributary of the left bank of the rio Paraná basin, the rio São José dos Dourados. It differs from all congeners by the combination of a metallic green to light green ground colour in males, with 6-8 oblique red bars forming chevronlike rows, the chevron tips along the midline of the body pointing toward the head, and irregular narrow red lines and incomplete red bars along the lower half of the body. Melanorivulus apiamici, also endemic from the middle rio Paraná basin, is redescribed.