Revision of the Neotropical Genus Acrobrycon (Ostariophysi: Characiformes: Characidae) with Description of Two New Species [Acrobrycon starnesi, A. ortii]

  • Dahiana Arcila, Richard P. Vari, and Naércio A. Menezes

    Abstract

    Zitat

    Acrobrycon, a genus of Neotropical freshwater fishes from the western Amazon and northwestern portions of the La Plata basin is revised. The genus is found to include three species, two of which are new to science. Acrobrycon ipanquianus is distributed from the western portions of the Río Amazonas through to the northwestern region of the Río de La Plata basin; A. starnesi, new species, in the southwestern portion of the Amazon basin in Bolivia; and A. ortii, new species, in the northwestern Río de La Plata basin in Argentina. Members of the genus are distinguished from each other on the basis of the depth at the dorsal-fin origin, the horizontal eye diameter, the least interorbital width, and the numbers of perforated lateral-line scales, anal-fin rays, and horizontal scales around the caudal peduncle. The analysis found that A. tarijae, described from the Río Lipeo in Bolivia, cannot be distinguished morphologically from A. ipanquianus; thus, A. tarijae is placed into the synonymy of A. ipanquianus.


    Quelle: Dahiana Arcila, Richard P. Vari, and Naércio A. Menezes (2013) Revision of the Neotropical Genus Acrobrycon (Ostariophysi: Characiformes: Characidae) with Description of Two New
    Species. Copeia: December 2013, Vol. 2013, No. 4, pp. 604-611
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