Skip to main content Skip to main navigation menu Skip to site footer
Type: Article
Published: 2018-01-24
Page range: 250–256
Abstract views: 75
PDF downloaded: 1

New species of Creagrutus (Ostariophysi; Characiformes; Characidae) from the Rio Xingu drainage, Brazil

Universidade Federal do Rio Grande do Sul, Departamento de Zoologia, Laboratório de Ictiologia, Avenida Bento Gonçalves, 9500, sala 117, 66077-530, 91501-970, Porto Alegre, RS, Brasil Museu Paraense Emílio Goeldi, Avenida Perimetral, 1901, 66077-530, Belém, PA, Brazil.
Museu Nacional, Universidade Federal do Rio de Janeiro, Departamento de Vertebrados, Quinta da Boa Vista, 20940-040 Rio de Janeiro, RJ, Brazil.
Pisces Caiapobrycon Stevardiinae Neotropical region taxonomy

Abstract

Creagrutus yudja is described from the Rio Xingu basin, Brazil. It is distinguished from its congeners by the lack of infraorbital 6, the shallower body (13.7–19.2% of SL), the presence of 34–36 perforated lateral line scales, and the presence of 4–6 post-anal scales. The inclusion of the new species on the available, morphology-based phylogenetic study of Creagrutus placed C. yudja as the sister-species of C. nigrotaeniatus, but the clade including those species is not recovered as sister to the pair C. cracentis + C. maxillaris, suggesting independent modifications of the dentition pattern typical of Creagrutus to a condition similar to the plesiomorphic characid condition within the genus.

 

References

  1. Dagosta, F.C.P. & Netto-Ferreira, A.L. (2015) New species of Bryconamericus Eigenmann (Characiformes: Characidae) from the rio Teles Pires, rio Tapajós basin, central Brazil. Zootaxa, 3911 (3), 433–442.

    https://doi.org/10.11646/zootaxa.3911.3.9

    Dagosta, F.C.P. & Pastana, M.N.L. (2014) New species of Creagrutus Günther (Characiformes: Characidae) from rio Tapajós basin, Brazil, with comments on its phylogenetic position. Zootaxa, 3765 (6), 571–582.

    https://doi.org/10.11646/zootaxa.3765.6.5

    Goloboff, P.A., Farris, J.S. & Nixon, K.C. (2008) TNT, a free program for phylogenetic analysis. Cladistics, 24, 774–786.

    https://doi.org/10.1111/j.1096-0031.2008.00217.x

    Harold, A.S. & Vari, R.P. (1994) Systematics of the trans-Andean species of Creagrutus (Ostariophysi: Characiformes: Characidae). Smithsonian Contributions to Zoology, 551, 1–31.
    https://doi.org/10.5479/si.00810282.551

    Netto-Ferreira, A.L. & Vari, R.P. (2017) A new highly modified species of Creagrutus (Characidae: Stevardiinae) apparently mimetic of Prodontocharax. Copeia, 2017, 368–374.

    https://doi.org/10.1643/CI-16-543

    Sabaj, M.H. (2016) Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an Online Reference. Version 6.5 (16 August 2016). Available from: http://www.asih.org/resources/standard-symbolic-codes-institutional-resource-collections-herpetology-ichthyology (accessed 20 December 2017)

    Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015) Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. BMC Evolutionary Biology, 15, 146.

    https://doi.org/10.1186/s12862-015-0403-4

    Vari, R.P. & Harold, A.S. (2001) Phylogenetic study of the neotropical fish genera Creagrutus Günther and Piabina Reinhardt (Teleostei: Ostariophysi: Characiformes), with revision of the Cis-Andean species. Smithsonian Contributions to Zoology, 613, 1–239.

    https://doi.org/10.5479/si.00810282.613