A new unicuspid-toothed species of HypostomusLacépède, 1803 (Siluriformes: Loricariidae) from the rio Paraguai basin

Claudio H Zawadzki,Otávio Froehlich,Luiz F C Tencatt

doi:10.1590/s1679-62252014000100010

Claudio H Zawadzki, Otávio Froehlich + Show 1 more

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https://doi.org/10.1590/s1679-62252014000100010

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Abstract

A new unicuspid-toothed armored catfish species of Hypostomus is described from the Bodoquena Plateau, rio Paraguai basin, Mato Grosso do Sul State, Brazil. The new species is distinguished from its congeners, with exception of H. fonchii, by having unicuspid teeth (vs.bicuspid teeth); from H. fonchii it is distinguished by having median series of lateral plates with 26-27 (vs. 28); by lower number of premaxillary and dentary teeth (7-10 vs. 18-21; 8-13 vs. 18-25, respectively); for possessing more depressed head (head depth 15.8-18.1% SL vs. 19.1-22.0% SL); and by the presence of median buccal papilla (vs. absence).

Highlights

Hypostomus Lacépède is the most species-rich genus of the Loricariidae, which currently comprises 130 valid species (Garavello et al, 2012; Zawadzki et al, 2013)
There are 11 nominal valid species described from the rio Paraguai basin: H. cochliodon (Kner), H. ternetzi (Boulenger), H. borellii (Boulenger), H. boulengeri (Eigenmann & Kennedy), H. latirostris (Regan), H. variostictus (Miranda Ribeiro), H. latifrons Weber, H. piratatu Weber, H. mutucae Knaack, H. peckoltoides Zawadzki, Weber & Pavanelli, and H. careopinnatus Martins, Marinho, Langeani & Serra
H. regani (Ihering), originally described from the upper rio Paraná basin occurs in the upper rio Paraguai basin (Weber et al, 1992; Veríssimo et al, 2005; Zawadzki, Renesto, Peres & Paiva, 2008)

Summary

Introduction

Hypostomus Lacépède is the most species-rich genus of the Loricariidae, which currently comprises 130 valid species (Garavello et al, 2012; Zawadzki et al, 2013). There are 11 nominal valid species described from the rio Paraguai basin: H. cochliodon (Kner), H. ternetzi (Boulenger), H. borellii (Boulenger), H. boulengeri (Eigenmann & Kennedy), H. latirostris (Regan), H. variostictus (Miranda Ribeiro), H. latifrons Weber, H. piratatu Weber, H. mutucae Knaack, H. peckoltoides Zawadzki, Weber & Pavanelli, and H. careopinnatus Martins, Marinho, Langeani & Serra. The Bodoquena region is drained by the Apa, Formoso, Formosinho, Perdido, Miranda, rio do Peixe, Salobra, and Sucuri rivers, all part of the rio Paraguai basin (Boggiani, 1999; Salles et al, 2006). Sabino & Trajano (1997) described Ancistrus formoso, an albino cave dwelling armored catfish and, ten years later Ribeiro et al (2007) published the discovery of a new characin Oligosarcus perdido from that region The region is known for its large aquatic biodiversity and endemism (Scremin-Dias et al, 1999). Sabino & Trajano (1997) described Ancistrus formoso, an albino cave dwelling armored catfish and, ten years later Ribeiro et al (2007) published the discovery of a new characin Oligosarcus perdido from that region

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