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Issue: Vol. 2167 No. 1: 24 Jul. 2009
Type: Articles
Published: 2009-07-24
DOI: 10.11646/zootaxa.2167.1.3
Page range: 47–58
Abstract views: 34
PDF downloaded: 2

A new genus and species of inseminating characid fish from the rio Xingu basin (Characiformes: Characidae)

Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42494, 04218–970, São Paulo, SP, Brazil
Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42494, 04218–970, São Paulo, SP, Brazil
Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42494, 04218–970, São Paulo, SP, Brazil
Fish Clade A Histology Systematics Ostariophysi Sexual dimorphism Neotropical region

Abstract

Phallobrycon adenacanthus, is described as a new genus and species belonging to Clade A characids of Malabarba & Weitzman (2003). The new taxon is the only characid possessing two developed spines on unbranched portions of fifth, sixth and seventh anal-fin rays associated with intumescent glandular tissue on the anterior portion of the anal fin of sexually mature males. Other non-exclusive diagnostic features of the new genus (observed in male specimens) are: urogenital papilla modified into a copulatory organ, absence of pelvic-fin hooks and glandular tissue not organized into an organ. The presence of these features in members of Clade A and other characids is discussed in order to hypothesize the relationships of Phallobrycon.

References

  1. Benine, R.C. & Lopes, G.A.M. 2008. A new species of Hyphessobrycon (Characiformes: Characidae) from río Portuguesa, río Orinoco basin, Venezuela. Zootaxa, 1747, 61–68.

    Bührheim, C.M. & Malabarba, L.R. 2007. Redescription of Odontostilbe pulchra (Gill, 1858) (Teleostei: Characidae: Cheirodontinae), and description of two new species from the río Orinoco basin. Neotropical Ichthyology, 5(1), 1–20.

    Burns, J.R. & Weitzman, S.H. 2006. Intromittent organ in the genus Monotocheirodon (Characiformes: Characidae). Copeia, 2006(3), 529–534.

    Fink, W.L. & Weitzman, S.H. 1974. The so-called cheirodontin fishes of Central America with descriptions of two new species (Pisces: Characidae). Smithsonian Contributions to Zoology, (172), 1–46.

    Gonçalves, T.K., M.A. Azevedo, L.R. Malabarba & C.B. Fialho. Reproductive biology and development of sexually dimorphic structures in Aphyocharax anisitsi (Ostariophysi: Characidae). Neotropical Ichthyology, 3(3), 433–438.

    Malabarba, L.R. & Weitzman, S.H. 2004. A genus and species of inseminating fish (Teleostei: Characidae: Cheirodontinae: Compsurini) from South America with uniquely derived caudal-fin dermal papillae. Proceedings of the Biological Society of Washington, 113(1), 269–283.

    Malabarba, L.R., Lima, F.C.T. & Weitzman, S.H. 2004. A new species of Kolpotocheirodon (Teleostei: Characidae: Cheirodontinae: Compsurini) from Bahia, northeastern Brazil, with a new diagnosis of the genus. Proceedings of the Biological Society of Washington, 117(3), 317–329.

    Malabarba, L.R. & Weitzman, S.H. 2003. Description of a new genus with six new species from Southeastern Brazil, Uruguay and Argentina, with a discussion of a putative characid clade (Teleostei: Characiformes: Characidae). Comunicações do Museu de Ciências e tecnologia, PUCRS, Série Zoologia, 16(1), 67–151.

    Menezes, N.A., Netto-Ferreira, A.L. & Ferreira, K.M. 2009. A new species of Bryconadenos (Characiformes: Characidae) from the rio Curuá (Rio Xingu drainage), Brazil. Neotropical Ichthyology 7(2), 147–152.

    Menezes, N.A. & Weitzman, S.H. In press. Systematics of the neotropical fish subfamily Glandulocaudinae (Teleostei: Characiformes: Characidae). Neotropical Ichthyology.

    Pearson, N.E. 1924. The fishes of the Eastern slope of the Andes. I. The fishes of the río Beni basin, Bolivia collected by the Mulford Expedition. Indiana University Studies, 11(64), 1–83.