Skip to main content Skip to main navigation menu Skip to site footer
Responsive image
Issue: Vol. 1918 No. 1: 29 Oct. 2008
Type: Article
Published: 2008-10-29
DOI: 10.11646/zootaxa.1918.1.5
Page range: 45–58
Abstract views: 32
PDF downloaded: 2

Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group

Department of Zoology and Animal Biology, University of Geneva, 30 quai Ernest Ansermet, 1211 Genve 4, Switzerland
Department of Zoology and Animal Biology, University of Geneva, 30 quai Ernest Ansermet, 1211 Genve 4, Switzerland
Fish Armored catfish Guyanas region Suriname endemic D-loop phylogeny Corantijn

Abstract

Pseudancistrus corantijniensis is described based on specimens captured in the Corantijn River in Suriname. It is diagnosed by a particular arrangement of whitish spots, very small in the anterior three quarters of the head and large from the posterior part of the head to the caudal peduncle. As indicated by our molecular phylogeny based on mitochondrial D-loop sequences, P. corantijniensis is a member of the Pseudancistrus barbatus group comprising Guyanese derived Pseudancistrus bearing hypertrophied odontodes along the snout and nonevertible cheek plates. Other members of this group are P. barbatus, P. depressus and P. nigrescens. The closest relative to the new species is P. nigrescens, while P. barbatus and P. depressus are sister species. The known distribution range of each of the four members of the P. barbatus group is disjoint. A key is provided for the identification of the four members of the P. barbatus group.

References

  1. Armbruster, J. W. (2003) Peckoltia sabaji, a new species from the Guyana Shield (Siluriformes: Loricariidae). Zootaxa, 344, 1–2.

    Armbruster, J. W. (2004a) Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus. Zootaxa, 628, 1–15.

    Armbruster, J. W. (2004b) Phylogenetic relationships of the suckermouth armored catfishes (Loricariidae) with emphasis on the Hypostominae and the Ancistrinae. Zoological Journal of the Linnean Society, 141, 1–80.

    Armbruster, J. W. (2005) Peckoltia cavtica, a new loricariid catfish from Guyana and a redescription of P. braueri (Eigenmann 1912) (Siluriformes). Zootaxa, 882, 1–14.

    Bleeker, P. (1862) Atlas ichtyologique des Indes orientales Néerlandaises, publié sous les auspices du Gouvernement colonial néerlandais. Tome II. SiluroVdes, ChacoVdes et HétérobranchoVdes. Frederic Muller, Amsterdam. Atlas ichtyologique des indes orientales Néerlandaises 2, 112 p.

    Felsenstein, J. (1981) Evolutionary trees from DNA-sequences- a maximum-likelihood approach. Journal of Molecular Evolution, 17, 368–376.

    Felsenstein, J. (1985) Confidence limits on phylogenies: an approach using the bootstrap. Evolution, 39, 783–791.

    Fisch-Muller, S. (2003) Subfamily Ancistrinae. In: Reis, R.E., Kullander, S.O. & Ferraris, C. J.Jr. (ED) Check List of the Freshwater Fishes of South and Central America, EDIPUCRS, Porto-Alegre, 373–400.

    Günther, A. (1868) Diagnoses of some new freshwater fishes from Surinam and Brazil, in the collection of the British Museum. Annals and Magazine of Natural History, Series 4 475–481

    Hall, T.A., (1999). BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series 41, 95–98.

    Isbrücker, I.J.H. (1980) Classification and catalogue of the mailed Loricariidae (Pisces, Siluiformes). Verslagen en Technische Gegevens, 22, 1–181.

    Le Bail, P.-Y., Keith, P. & Planquette, P. (2000) Atlas des poissons d'eau douce de Guyane, tome 2, fascicule 2. Collection Patrimoines Naturels, 43(II), MNHN/SPN, Paris. 307 pp.

    Lujan, N. K., Armbruster, J.W. & Sabaj M.H. (2007) Two new species of Pseudancistrus from southern Venezuela (Siluriformes: Loricariidae). Ichthyol. Explor. Freshwaters, vol. 18, No.2, pp. 163-174).

    Montoya-Burgos, J.I., Muller, S., Weber, C. & Pawlowski, J. (1998) Phylogenetic relationships of the Loricariidae (Siluriformes) based on mitochondrial rRNA gene sequences. In: Malabarba, L.R., Reis, R.E., Vari, R.P., Lucena

    Z.M.S., Lucena, C.A.S. (Eds.) Phylogeny and Classification of Neotropical Fishes. Edipucrs Porto Alegre, Porto Alegre, Brazil, pp. 363–374.

    Montoya-Burgos, J.I., Weber, C. & Le Bail, P.-Y. (2002) Phylogenetic relationships within Hypostomus (Siluriformes: Loricariidae) and related genera based on mitochondrial D-loop sequences. Revue Suisse de Zoologie, 109, 369–382.

    Posada, D. & Crandall, K.A. (1998). MODELTEST: testing the model of DNA substitution. Bioinformatics 14, 817–818.

    Schaefer, S.A., (1987) Osteology of Hypostomus plecostomus (Linnaeus) with a phylogenetic analysis of the loricariid subfamilies (Pisces: Siluroidei). Contributions in Science, Natural History Museum of Los Angeles County, 394, 1–31.

    Swofford, D.L., (2003) PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4. Sinauer Associates, Sunderland, MA.