Range extension of Hypostomus cochliodon Kner, 1854 (Siluriformes: Loricariidae) in Bermejo River, Salta, Argentina

Guillermo Enrique Terán,Juan Marcos Mirande,Felipe Alonso,Gastón Aguilera

doi:10.15560/12.4.1953

Abstract

Hypostomus cochliodon Kner, 1854 had been recorded from Paraguay and Paraná rivers in Argentina. We recorded for the first time specimens of H. cochliodon to the Bermejo River basin. It is also the first record of this species to Salta province, Argentina.

Highlights

The Loricariidae include over 900 species in 70 genera, being the most diverse family within Siluriformes (Eschmeyer and Fong 2015)
In Argentina, this group is represented only by Hypostomus cochliodon Kner, 1854, which was described from the Cuiabá River basin, Brazil (Kner 1854: 265) but can be found along the Paraguay and Paraná rivers (Armbruster 2003; Weber 2003; Zawadzki et al 2005; Graça and Pavanelli 2007; Tencatt et al 2014; Almirón et al 2015)
According to Tencatt et al (2014), Hypostomus cochli odon can be distinguished from the other species of the H. cochliodon group by the following characters: 1) opercle almost completely covered by a thick layer of skin and exposed region not visible; 2) absence of buccal papillae; 3) presence of weak to moderately developed keels on lateral plates; 4) presence of small dark spots closely-set on head and larger, widely spaced spots on trunk, with caudal peduncle generally without spots; 5) caudal-fin lobes evenly colored; 6) bicuspid teeth with a large spoon-shaped mesial cusp and inconspicuous lateral cusp that is generally fused to mesial cusp; 7) absence of a longitudinal dark stripe along midline of flank; and 8) presence of an adipose fin

Summary

Introduction

The Loricariidae include over 900 species in 70 genera, being the most diverse family within Siluriformes (Eschmeyer and Fong 2015). In Argentina, this group is represented only by Hypostomus cochliodon Kner, 1854, which was described from the Cuiabá River basin, Brazil (Kner 1854: 265) but can be found along the Paraguay and Paraná rivers (Armbruster 2003; Weber 2003; Zawadzki et al 2005; Graça and Pavanelli 2007; Tencatt et al 2014; Almirón et al 2015).

Results

Conclusion