Camelier P, Dagosta F C P, Marinho M M F
Museu de Zoologia da Universidade de São Paulo, Seção de Peixes, Caixa Postal 42494, 04218-970, São Paulo, SP, Brazil.
J Fish Biol. 2018 Apr;92(4):1149-1162. doi: 10.1111/jfb.13579. Epub 2018 Mar 2.
A new miniature species of Hyphessobrycon is described from an affluent of the Rio Papagaio, tributary of the Rio Juruena, upper Rio Tapajós basin, Mato Grosso State, Brazil. The new species can be distinguished from its congeners by having a remarkable secondary sexual dimorphism in its live colouration (males are red and females yellow), well-defined and relatively narrow dark midlateral stripe extending from tip of snout to tip of middle caudal-fin rays, absence of humeral blotch, 15-18 branched anal-fin rays and five or six branched pelvic-fin rays. The sexually dimorphic colouration of the new species is briefly discussed regarding its temporal variation.
一种新的小型魮脂鲤属物种是从巴西马托格罗索州上塔帕若斯河流域茹鲁埃纳河的支流帕帕盖奥河的一条支流中描述的。该新物种与其同属物种的区别在于，其活体颜色具有显著的两性异形（雄性为红色，雌性为黄色），有一条从吻端延伸至尾鳍中部鳍条末端的清晰且相对狭窄的深色体侧中线，没有肩部斑点，有15 - 18根分枝的臀鳍鳍条和5或6根分枝的腹鳍鳍条。文中简要讨论了新物种两性异形颜色的时间变化。
