Microglanis pataxo, a new catfish from southern Bahia coastal rivers, northeastern Brazil (Siluriformes: Pseudopimelodidae)

Abstract

A new pseudopimelodid catfish of the genus Microglanis, collected in small rivers at the lower and middle Peruípe, middle Jucuruçu and Cahy basins, in the southeastern coast of the Bahia state, is described. The new species has a comparatively high number of anal fin proximal radials, 12, shaped as thin tubes, the last one bearing a laminar extension; a pectoral fin spine with a bony point and with a smaller number of serrations on its posterior border; seven pleural ribs and a narrow head width. We provide information on the external morphology and also on some osteological features for the new species. A key to species is presented for the coastal drainages between Rio de Janeiro and Bahia states.É descrito um novo pseudopimelodídeo do gênero Microglanis, coletado em riachos tributários das bacias do baixo e médio rio Peruípe, médio rio Jucuruçu e rio Cahy, na costa sudeste do estado da Bahia. A nova espécie tem comparativamente um maior número de radiais proximais da nadadeira anal, 12, em formato de finos tubos, sendo que o último elemento possui uma extensão laminar; nadadeira peitoral com extremidade óssea e com pequeno número de serrilhas no bordo posterior; sete costelas pleurais e cabeça estreita. São fornecidas informações sobre a morfologia externa bem como sobre alguns aspectos da osteologia da nova espécie. É apresentada uma chave para as espécies nas drenagens costeiras entre os estados do Rio de Janeiro e Bahia.

A new glanapterygine catfish of the genus Listrura (Siluriformes: Trichomycteridae) from southeastern Brazil, corroborated by morphological and molecular data

“…The genus Cruciglanis Ortega-Lara & Lehmann (Pseudopimelodidae) also displays a crucifix-shaped basibranchial element, but it is relatively different from Stauroglanis as discussed by Ortega-Lara & Lehmann (2006). Another pseudopimelodid, Microglanis pataxo Martins-Pinheiro, Aranda & Chamon, shows a crucifixshaped basibranchial element, however it is fully cartilaginous (Sarmento-Soares et al, 2006: fig. 7).…”

Astyanax vermilion and Astyanax burgerai: new characid fishes (Ostariophysi: Characiformes) from Northeastern Bahia, Brazil

“…Coastal northeastern Brazilian rivers are recognized by its high degree of endemism together with the increasing description of new species in the last decade (Lima & Gerhard, 2001;Malabarba et al, 2004;Zanata & Akama, 2004;Britto et al, 2005;Sarmento-Soares et al, 2005;Benine et al, 2007;Birindelli et al, 2007;Zanata & Camelier, 2008). This assertion fits precisely for rivers crossing the area around Ilhéus on Bahia State, as rio Almada, rio Cachoeira and rio do Braço, which holds various putatively endemic species.…”

A fauna de peixes na bacia do Rio Peruípe, extremo Sul da Bahia

“…There were found 26 species belonging to 12 families in 6 orders. Within the species sampled Trichomycterus pradensis Sarmento-Soares et al (2005) and Microglanis pataxo were recently described as new. About 48.7% of total amount of fishes caught belong to the order Siluriformes, 38.5% to Characiformes, 34.6% to Perciformes, 11.5% to Cyprinodontiformes, 7.7% to Gymnotiformes, 3.8% to Synbranchiformes, and 3.8% to Pleuronectiformes.…”

“…No total foram verificadas 26 espécies pertencentes a 12 famílias em 6 ordens. Das espécies coletadas Trichomycterus pradensis Sarmento-Soares et al (2005) e Microglanis pataxo foram recentemente descritas como novas. Aproximadamente 48,7% do total de peixes na bacia pertencem à ordem Siluriformes, 38,5% a Characiformes, 34,6% a Perciformes, 11,5% a Cyprinodontiformes, 7,7% a Gymnotiformes, 3,8% a Synbranchiformes e 3,8% a Pleuronectiformes.…”