Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Biologia de Água Doce e Pesca Interior, Manaus, Brazil.
Departamento de Vertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
J Fish Biol. 2020 Sep;97(3):860-868. doi: 10.1111/jfb.14445. Epub 2020 Aug 18.
Bryconops cyrtogaster, a poorly known species endemic from the Oyapock River at the border between French Guyana and Brazil, is redescribed herein based on examination of available type material, as well as newly collected material. Additionally, a new rheophilic species from the rio Jari rapids, lower Amazon basin, Brazil, is described. The two species belong to the subgenus Creatochanes and are unique among the congeneres for possessing a posteriorly positioned humeral blotch at the level of the sixth and seventh lateral line scales. They differ from each other by meristic and morphometric characters. The list of endemic species in the rio Jari basin is revised.
小眼无须魮，一种分布于法属圭亚那和巴西边界的 Oyapock 河的特有物种，本文根据对现有模式标本的检查以及新采集的标本对其进行了重新描述。此外，本文还描述了来自巴西亚马逊河下游的 Jari 急流的一种新的嗜流水生种。这两个物种属于 Creatochanes 亚属，与同属种不同的是，它们在第六和第七侧线鳞片水平上具有位于后侧的肩斑。它们在形态和形态特征上存在差异。还对 Jari 河流域的特有种列表进行了修订。
