Cynolebias akroa, a new species of annual fish (Cyprinodontiformes: Rivulidae) from the rio Preto, São Francisco basin, northeastern Brazil

  • Dalton Tavares Bressane Nielsen, Mayler Martins, Luciano Medeiros de Araujo, Fabio Origuela de Lira and Amer Faour



    A new species of Cynolebias is described from temporary pools from the Rio Preto drainage, São Francisco basin, Bahia, Brazil, within the Caatinga domain. The type-locality is an altered aquatic environment, with the presence of exotic fish species and in contact with a permanent watercourse. Cynolebias akroa sp. n., along with Hypsolebias faouri, that inhabits the same annual pool, are in great danger of extinction. Cynolebias akroa sp. n., appears to be more closely related to Cynolebias parnaibensis, with which it shares several features, than to the remaining species of Cynolebias from the middle Rio São Francisco basin. Cynolebias akroa sp. n. differs from other species of Cynolebias by the male color pattern, relative position of dorsal fin to the anal fin, pelvic-fin rays counts, shape of the urogenital papilla, and cephalic neuro­mast pattern.

    Quelle: aqua International