Melanorivulus nigromarginatus sp. n., holotype, UFRJ 8434, male, 27.6 mm SL. Photograph by W.J.E.M. Costa.

  Part of: Costa WJEM (2018) Three new species of the killifish genus Melanorivulus from the Rio ParanĂ¡ Basin, central Brazilian Cerrado (Cyprinodontiformes, Aplocheilidae). Zoosystematics and Evolution 94(1): 17-27.  

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