![]() New species of Rhyacoglanis (Siluriformes: Pseudopimelodidae) from rio Tocantins basin, northern Brazil. Īnd Shibatta et al., (2021b) Shibatta OA, Rocha MS, Oliveira RR. A new genus of Neotropical rheophilic catfishes, with four new species (Teleostei: Siluriformes: Pseudopimelodidae). Comparative material is listed in Shibatta, Vari, (2017) Shibatta OA, Vari RP. Measurements and counts were made according to Shibatta, Vari, (2017) Shibatta OA, Vari RP. The new species of Rhyacoglanis described herein reinforces the endemicity of fishes in the basin. Building knowledge to save species: 20 years of ichthyofauna studies in the Tocantins-Araguaia River basin. This region is considered highly endemic and has 27 (52.9%) of the 51 threatened fish species in the entire rio Tocantins-Araguaia basin ( Chamon et al., 2022 Chamon CC, Serra JP, Camelier P, Zanata AM, Fischberg I, Marinho MMF. Microglanis maculatus Shibatta, 2014 is the only species of Pseudopimelodidae described from the upper rio Tocantins basin. Rhyacoglanis is distributed in the Amazon, Orinoco, Paraná, Paraguay, and lower rio Tocantins basins ( Shibatta, Vari, 2017 Shibatta OA, Vari RP. Phylogeny of the Neotropical Pacman catfish genus Lophiosilurus (Siluriformes: Pseudopimelodidae). Shibatta et al., 2021 Shibatta OA, Jarduli LR, Abrahão VP, Souza-Shibatta L. The monophyly of Rhyacoglanis is corroborated by morphological and molecular analyses ( Shibatta, Vari, 2017 Shibatta OA, Vari RP. The genus can be identified by the following morphological characters: small size (maximum known size of 89.2 mm standard length – SL), premaxillary dentigerous plate posterolaterally pointed, lateral line elongated, lateral region of the head with rounded shape depigmented area, body with dark brown vertical bars, and caudal fin with dark brown band usually confluent midlaterally with the dark brown bar on the caudal peduncle ( Shibatta, Vari, 2017 Shibatta OA, Vari RP. ![]() rapppydanielae Shibatta, Rocha & Oliveira, 2021, and R. Phylogenomics of the bumblebee catfishes (Siluriformes: Pseudopimelodidae) using ultraconserved elements. Silva et al., 2021 Silva GSC, Melo B, Roxo FF, Ochoa LE, Shibatta OA, Sabaj MH, Oliveira C. 1912 5(1):1–578.) ( Shibatta et al., 2021 Shibatta OA, Jarduli LR, Abrahão VP, Souza-Shibatta L. The freshwater fishes of British Guiana, including a study of the ecological grouping of species, and the relation of the fauna of the plateau to that of the lowlands. , Pseudopimelodus Bleeker, 1858, and Rhyacoglanis Shibatta & Vari, 2017) and Batrocoglaninae ( Batrochoglanis Gill, 1858, Lophiosilurus Steindachner, 1876, and Microglanis Eigenmann, 1912 Eigenmann CH. Cruciglanis, a new genus of Pseudopimelodid catfish (Ostariophysi: Siluriformes) with description of a new species from the Colombian Pacific coast. It comprises six genera, distributed in the subfamilies Pseudopimelodinae ( Cruciglanis Ortega-Lara & Lehmann, 2006 Ortega-Lara A, Lehmann PA. Pseudopimelodidae Fernández-Yépez & Antón, 1966 is a small family of Neotropical catfishes with 54 known species ( Shibatta et al., 2021a Shibatta OA, Jarduli LR, Abrahão VP, Souza-Shibatta L.
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