Microglanis carlae, a new species of bumblebee catfish (Siluriformes: Pseudopimelodidae) from the río Paraguay basin in Paraguay

Abstract

Microglanis carlae, new species, is described from the río Paraguay basin and distinguished from its congeners by the following combination of characters: paired and anal fins mottled or with thin faint bands, trunk with dark-brown saddles, anterior margin of pectoral spine with serrations retrorse proximally and antrorse distally, tip of pectoral spine as a distinct bony point, continuous portion of lateral line reaching vertical through last dorsal-fin ray, caudal peduncle with irregularly shaped, faint to dark blotch, maxillary barbel surpassing vertical through dorsal-spine origin, and dark bar on posterior flank continuous from base of adipose fin to that of anal fin. The new species is included in the Microglanis parahybae species complex on the basis of color pattern.Microglanis carlae, espécie nova, é descrita da bacia do rio Paraguai e distinguida de todas as congêneres pela seguinte combinação de caracteres: nadadeira anal e nadadeiras pares pigmentadas ou com faixas estreitas, corpo com manchas ou faixas escuras, margem anterior do espinho peitoral com serras retrorsas proximalmente e antrorsas distalmente, espinho peitoral terminando numa ponta, parte contínua da linha lateral atingindo a vertical que passa pelo último raio da nadadeira dorsal, pedúnculo caudal com uma mancha tênue a escura de forma irregular, barbilhão maxilar ultrapassando a vertical que passa pela origem do espinho da nadadeira dorsal, e uma barra escura contínua da base da nadadeira adiposa até a anal. A nova espécie é incluída no complexo de espécies Microglanis parahybae com base no padrão de colorido.

Biology and population features of a rare species of Pseudopimelodidae from the Upper Paraná River Basin

“…Aquatic insects are also dietary items of M. pataxo and M. carlae (SarmentoSoares et al 2006, Alcaraz et al 2008. Probably, M. garavelloi has benthic behavior, not differing from other siluriforms (Bockmann & Guazzelli 2003) that feed on the river substrate.…”

“…Some aspects known for other species are the reproductive patterns of Microglanis iheringi Gomes, 1946 that shows parental care (Winemiller 1989) and, like L. alexandri, has eggs with large diameter (1.1 mm). Microglanis carlae Alcaraz et al (2008) feed on algae and insect larvae, and Microglanis pataxo Sarmento-Soares et al (2006) consumes larvae and pupae of aquatic insects (Sarmento-Soares et al 2006, Alcaraz et al 2008.…”

“…The genus Microglanis Eigenmann (1912), currently composed of 17 species (Alcaraz et al 2008), is represented only by Microglanis garavelloi Shibatta & Benine, (2005) in the Upper Paraná River basin. This species has been previously recorded in a few streams and rivers of the Paranapanema River Basin (Taquari and Pau D'Alho streams) and of Tietê River Basin (Pirapitingui and Barreiro Rivers), and is reported as a rare species.…”

A new species of bumblebee catfish of the genus Microglanis (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil

“…For the upper rio Paraguay basin in Pantanal region, Britski et al (2007) and Polaz et al (2014) mentioned M. cottoides Boulenger, 1891, a species originally described to rio Camaquã, laguna dos Patos basin, a coastal system unconnected to Paraná-Paraguay basin. Another species assigned to rio Paraguay basin is M. carlae Alcaraz, Graça & Shibatta, 2008, described from its lower region at Paraguay. Alcaraz et al (2008) also examined a specimen from upper rio Paraguay basin (NUP 3533) and supposed it belonged to another species, probably new to science.…”

“…Another species assigned to rio Paraguay basin is M. carlae Alcaraz, Graça & Shibatta, 2008, described from its lower region at Paraguay. Alcaraz et al (2008) also examined a specimen from upper rio Paraguay basin (NUP 3533) and supposed it belonged to another species, probably new to science. A detailed morphological analysis of this and additional specimens highlight differences between specimens collected in upper rio Paraguay basin and M. cottoides of coastal region, as well as to M. carlae, allowing the description of a new species presented herein.…”