Characidium heirmostigmata, a new characidiin fish (Characiformes: Crenuchidae) from the upper rio Paraná basin, Brazil

Abstract

Characidium heirmostigmata new species is described from the rio Ivaí drainage, upper rio Paraná basin, Paraná State, Brazil. The new species is diagnosed among its congeners by the possession of eight to 11 incomplete oblique dark bars on the body sides, extending upwards and downwards from the lateral line, independently of the eight or nine dorsal transverse bars usually present in species of Characidium. The new species is similar to Characidium serrano from the upper rio Uruguay basin, but differs by meristic and morphometric traits.Characidium heirmostigmata espécie nova é descrita da drenagem do rio Ivaí, bacia do alto rio Paraná, Estado do Paraná, Brasil. A nova espécie é diagnosticada de suas congêneres por apresentar oito a 11 barras escuras, oblíquas e incompletas nas laterais do corpo, para cima e para baixo da linha lateral, independentemente das oito ou nove barras transversais que geralmente estão presentes nas espécies de Characidium. A nova espécie é similar a Characidium serrano, da bacia do alto rio Uruguai, porém difere em caracteres merísticos e morfométricos.

Inventory of the fish fauna from Ivaí River basin, Paraná State, Brazil

“…The Ivaí River basin has 13 new species to science (species marked with an asterisk are endemic to the Ivaí River basin; Figure 2, Graça & Pavanelli, 2008;and Steindachneridion scriptum (Miranda-Ribeiro, 1918).…”

“…The origin of each species was determined according to by Langeani et al (2007), in which autochthonous species are native to the upper Paraná River basin, the allochthonous species were introduced from other basins belonging to the Neotropical region and the exotic were introduced from other continents. The origin of each species were obtained from Reis et al (2003), Langeani et al (2007), Graça & Pavanelli (2008), Roxo et al (2014), Tencatt et al (2014), Zawadzki et al (2016) and personal communications from Cláudio H. Zawadzki (UEM); other species were considered endemic by means of analysis and comparison of data obtained with comparative material from adjacent basins.…”

“…Identification follows , Graça & Pavanelli (2008), Tencatt et al (2014) and Roxo et al (2014). Some individuals of Trichomycterus identified as Trichomycterus sp., Trichomycterus sp.…”

“…There are only few surveys on fish fauna in the Ivaí River basin, especially for the tributaries, Barra Bonita River (Maier et al 2008), Bonito River (Viana et al 2013), some streams located in the Perobas Biological Reserve (Delariva & Silva 2013) and a first-order stream in the municipality of Marialva (Araújo et al 2011); and there are few genetic studies with some species of Loricariidae (Zawadzki et al 2004, Portela-Castro et al 2007, Paiva et al 2013 or ecological studies (Luiz et al 2003, Luiz et al 2005) and description of new species (Graça & Pavanelli 2008, Roxo et al 2014, Tencatt et al 2014, Zawadzki et al 2016) with fish of this basin.…”

Compartilhamento de recursos por duas espécies de peixes nectobentônicas de riachos na bacia do rio Cachoeira (BA)

“…Para estes autores, estas características permitem a exploração de pequenos espaços entre as rochas, sendo caracterizados como bagres especuladores de substratos que se alimentam basicamente de larvas aquáticas de insetos, e classificados como nectobentônicos Da mesma forma, Characidium aff. zebra Eigenmann, 1909 está dentro de um gênero rico, com cerca de 50 espécies que não ultrapassam 100 mm de comprimento padrão e ocorre em bacias hidrográficas Neotropicais (Graça & Pavanelli 2008). Segundo Aranha et al (2000) e Casatti & Castro (2006), o corpo fusiforme e as nadadeiras peitorais e pélvicas alargadas, expandidas e localizadas na posição ventral, permitem a estas espécies manterem-se firmemente aderidas ao substrato, resistindo ao fluxo da corrente, caracterizandoas, também, como nectobentônicas.…”