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Published: 2018-01-24

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


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.



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