Two new species of Rineloricaria (Siluriformes: Loricariidae) from the rio Iguaçu basin, southern Brazil

Abstract

Rineloricaria langei and R. maacki, new species, are described from upper and middle regions of the rio Iguaçu basin, a left bank tributary of the rio Paraná basin, southern Brazil. Rineloricaria langei has narrow body and is similar to R. quadrensis, which is found in coastal rivers of Rio Grande do Sul State and is distinguishable by several morphometric characters. Rineloricaria maacki is distinguishable from all other congeners by the shape and extension of the naked area of the ventral region of pectoral girdle and other morphological characters. The presence of a naked region on the abdominal surface is shared with other species from the rio Paraná and rio Uruguay basins and coastal drainages from southeastern and southern Brazil. This may indicate a close phylogenetic relationship among these species. Similarities between the two new species and species from the aforementioned drainages also suggest close biogeographic relationship between the Paraná basin and other Brazilian coastal Atlantic drainages throughout the rio Iguaçu basin.Rineloricaria langei e R. maacki, espécies novas, são descritas para os cursos médio e alto da bacia do rio Iguaçu, tributário esquerdo do sistema do rio Paraná, sul do Brasil. Rineloricaria langei tem o corpo estreito e é semelhante a R. quadrensis, que ocorre nos rios costeiros do estado do Rio Grande do Sul, da qual distingui-se por características morfométricas. Rineloricaria maacki distingui-se de todas as suas congêneres pela forma e extensão da área nua da região ventral da cintura peitoral e outras características morfológicas. A presença de uma região nua na superfície ventral de R. maacki é compartilhada por outras espécies das bacias dos rios Paraná e Uruguai, e das drenagens costeiras do sudeste e sul do Brasil. Isto pode indicar uma proximidade filogenética entre estas espécies. Semelhanças entre as duas espécies novas e espécies das bacias supracitadas também sugerem um relacionamento biogeográfico próximo entre a bacia do Paraná e os rios costeiros brasileiros através da bacia do rio Iguaçu.

Peixes do baixo rio Iguaçu

“…Esta espécie apresenta distribuição geográfica restrita à bacia do médio e do baixo rio Iguaçu (INGENITO; GHAZZI; DUBOC; ABILHOA, 2008 Corpo marrom-oliva, com machas amarelo-claras. Região ventral da cabeça até a nadadeira anal marrom-clara, com manchas amarelo-claras arredondadas ou vermiculadas.…”

Inventory of the ichthyofauna from the Jordão and Areia river basins (Iguaçu drainage, Brazil) reveals greater sharing of species than thought

“…In addition to those species that we collected for this study, other species have been reported for the area in the literature. The literature includes recent species descriptions (Casciotta et al 2004;Wosiacki and Garavello 2004;Garavello 2005;Pereira 2005;Lucinda et al 2006;Garavello and Shibatta 2007;Casciotta and Almirón 2008;Ingenito et al 2008;Lucinda 2008;de Pinna 2008a, 2008b;Pavanelli and Bifi 2009;Bifi et al 2009;Vera Alcaraz et al 2009;Garavello and Sampaio 2010;Říčan et al 2011;Garavello et al 2012) as well as ecological or ecomorphological studies and inventories covering the study area (Garavello et al 1997;Lucinda 2005;Loureiro-Crippa and Hahn 2006;Kantec et al 2007;Hahn and Fugi 2008;Pavanelli and Oliveira 2009;Garavello et al 2012;Baumgartner et al 2012;Mise et al 2013). Species not captured by us but mentioned in previous studies were included in the list, as were species recorded in the Species Link on-line database da Esperança, we sampled several localities within the two basins.…”

Intergeneric phylogenetic relationships in catfishes of the Loricariinae (Siluriformes: Loricariidae), with the description of Fonchiiloricaria nanodon: a new genus and species from Peru

“…Within the Loricariidae, members of the subfamily Loricariinae are united by a long and depressed caudal peduncle and by the absence of an adipose fin, but they exhibit substantial variation in body shape, lip morphology and dentition. There are currently 220 valid species of Loricariinae, distributed in 30 genera (Covain & Fisch‐Muller, 2007; Fichberg & Chamon, 2008; Ghazzi, 2008; Ingenito et al , 2008; Rapp Py‐Daniel & Fichberg, 2008; Rodriguez & Miquelarena, 2008; Rodriguez & Reis, 2008; Rodriguez et al , 2008; Thomas & Rapp Py‐Daniel, 2008; de Carvalho Paixão & Toledo‐Piza, 2009; Thomas & Sabaj Pérez, 2010).…”