A new species of Ituglanis (Siluriformes: Trichomycteridae) from the rio Uruguai basin, southern Brazil

Abstract

A new species of Ituglanis associated to the grasslands of the Pampa biome is described from the rio Uruguai basin, southern Brazil. The new species is distinguished from its congeners by the low number of ribs and by a unique color pattern composed of an outer layer with scattered round black blotches equivalent in size to the eye circumference over a reddish brown background on the lateral surface of the body. We provide the genetic sequences of the mitochondrial gene Cytochrome c Oxydase subunit I (COI) for three of the paratypes and discuss aspects about the recent discovery of the new species.Keywords: Genetype, Pampa Biome, Rio Ibicuí, South Brazilian Grasslands, Taxonomy.Uma nova espécie de Ituglanis, associada aos campos do bioma Pampa, é descrita para a bacia do rio Uruguai no sul do Brasil. A nova espécie distingue-se de todos seus congêneres pelo pequeno número de costelas e por um padrão de coloração único que consiste de manchas pretas arredondadas de tamanho equivalente à circunferência do olho sobre um fundo marrom avermelhado na superfície lateral do corpo. Sequências genéticas do gene mitocondrial Citocromo Oxidase subunidade I (COI) para três dos parátipos são fornecidas, e aspectos sobre a recente descoberta da nova espécie são discutidos.

Climate change going deep: The effects of global climatic alterations on cave ecosystems

“…Accordingly, several studies have documented the potential recent spread of pathogen fungi in terrestrial subterranean habitats (Escobar et al, 2014) or of alien species in marine caves (Gerovasileiou et al, 2016). Furthermore, dramatic modification of surface habitats (e.g., aridification and deforestation), may also induce changes in the hydrological regimes of caves, with consequent further degradation of the cave ecosystem (Trajano et al, 2009, Bichuette andTrajano, 2010).…”

Two new species of Heptapterus (Siluriformes: Heptapteridae) from the Uruguay River basin, Brazil

“…The main channel of the river and its large tributaries are characterised by the presence of fine sand substrate (Bertaco et al ., ), making it a very distinctive environment. Some endemic fish species such as the seasonal killifish Austrolebias ibicuiensis (Costa, 1999), which is classified as Critically Endangered (ICMBio, ) and Ituglanis inusitatus Ferrer & Donin are restricted to Ibicuí and Butuí rivers (Ferrer & Donin, ). Given the geographic restriction of H. exilis in some tributaries of the Ibicuí River (Figure ), it is likely that this species is also endemic to this basin.…”

“…Ituglanis inusitatus Ferrer & Donin 2017 are restricted to Ibicuí and Butuí rivers (Ferrer & Donin, 2017). Given the geographic restriction of H. exilis in some tributaries of the Ibicuí River ( Figure 5), it is likely that this species is also endemic to this basin.…”