Hypostomus hermanni redescription and a new species of Hypostomus (Siluriformes: Loricariidae) from Upper Paraná River basin, Brazil

Abstract

A redescription of Hypostomus hermanni is presented herein along with the description of a new species of Hypostomus, which is apparently endemic to the Ivaí River basin, a tributary of the Upper Paraná River basin, Brazil. Hypostomus hermanni is diagnosed from congeners mainly by having: usually large black blotches on body and fins; absence of keels on compound pterotic, on pre-dorsal plates, and on lateral series of bony plates; by having parieto-supraoccipital and predorsal region flat; and by having less than 46 teeth per each premaxilla or dentary ramus. The new species is distinguished from congeners mainly for lacking conspicuous blotches, parieto-supraoccipital non-carinate, and villiform bicuspid teeth.

Catfishes: A global review of the literature

“…These discoveries highlight the importance of continued exploration in diverse ecosystems to uncover new species and better understand the biogeographical history of catfish. In a comprehensive taxonomic revision, Dias and Zawadzki [ 121 ] delved into the Neotropical catfish genus Hypostomus, shedding light on the hidden diversity of these fishes and providing a framework for future research on their ecology, evolution, and conservation. This study underscores the significance of re-evaluating existing taxonomic classifications and integrating novel techniques to uncover previously unrecognized diversity.…”

Ficha de Hypostomus hermanni

“…Endêmica do Brasil: Sim Hypostomus hermanni é endêmica do Brasil e ocorre nos rios Piracicaba e Tietê, no estado de São Paulo, e também no canal principal do rio Paraná e em três de seus afluentes esquerdos (rios Paranapanema, Ivaí e Piquiri), no estado do Paraná (Dias & Zawadzki, 2021).…”

“…A espécie é descrita do rio Piracicaba, tributário do rio Tietê, estado de São Paulo (Ihering, 1905). De acordo com Dias & Zawadzki (2021), devido às características ambientais onde a H. hermanni é encontrada, é provável que sua localidade-tipo exata seja o Salto de Piracicaba, único trecho rápido rochoso no rio Piracicaba, município de Piracicaba.…”

Spatial distribution patterns and predictors of fish beta‐diversity in a large dam‐free tributary from a Neotropical floodplain

“…Efforts to increase the sampling of the fish fauna from the Ivaí River basin (Reis, Frota, Deprá, et al, 2020) resulted in the discovery of several new endemic taxa (Dias & Zawadzki, 2021;Graça & Pavanelli, 2008;Reis, Frota, Fabrin, & Graça, 2020;Roxo et al, 2014;Tencatt et al, 2014;Zawadzki et al, 2016). An updated checklist including 108 native and 24 non-native species (Reis, Frota, Deprá, et al, 2020), as well as distribution patterns of rare and restricted species in some mountain streams (Frota, Pacifico, & Graça, 2021), and growth parameters for endemic species (Frota, Ganassin, & Graça, 2021) 53 41 0 43 00 W) and runs through a wide range of landscapes that are distinct in lithology (Leli et al, 2017;Meurer et al, 2010;Souza et al, 2018).…”

“…The upper Ivaí River basin has proved to be an important cradle of new fish species (e.g. Dias & Zawadzki, 2021; Graça & Pavanelli, 2008; Reis, Frota, Fabrin, & Graça, 2020; Roxo et al, 2014; Tencatt et al, 2014; Zawadzki et al, 2016). Besides, this region is apparently of historical significance for the evolutionary diversification of several fish lineages.…”