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首页> 外文期刊>Proceedings of the Biological Society of Washington >Xenurobrycon coracoralinae, a new glandulocaudine fish (Ostariophysi: Characiformes: Characidae) from central Brazil
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Xenurobrycon coracoralinae, a new glandulocaudine fish (Ostariophysi: Characiformes: Characidae) from central Brazil

机译:Xenurobrycon coracoralinae,来自巴西中部的一种新的腺尾鱼(Ostariophysi:Characiformes:Characidae)

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摘要

A new glandulocaudine xenurobryconin fish, Xenurobrycon coracoralinae, is described from the rio Araguaia basin, Brazil. The new species is distinguished from congeners in having the anal-fin hooks of mature males restricted to the last unbranched and the first four, rarely five, branched rays. The combination of the absence of a semicircular flange-like process on principal caudal-fin ray 18 and of an adipose fin, and the presence of seven pelvic-fin rays and only conical teeth, also distinguish the new species from its congeners. Resumo.-Uma nova especie de peixe da tribo Xenurobryconini, sub-familia Glandulocaudinae, Xenurobrycon coracoralinae, 6 descrito para a bacia do rio Araguaia, Brasil. A nova especie distingue-se das demais especies do genero por apresentar ganchos apenas no ultimo raio nao ramificado e nos primeiros quatro, raramente cinco, raios ramificados da nadadeira anal dos machos. A nova especie se distingue das congeneres ainda pela combinacao de ausencia de aba semicircular no raio principal 18 da nadadeira caudal e nadadeira adi-posa, e pela presenca de sete raios pelvicos e somente dentes conicos.
机译:从巴西里奥阿拉瓜亚盆地描述了一种新的腺胃多囊异豆素鱼,即粘膜异纤藻。新物种与同类动物的区别在于,成熟雄性的肛门鳍钩被限制在最后的无分支和前四个,很少五个分支的射线上。主尾鳍射线18上没有半圆形的凸缘状突起和脂肪鳍,加上七个骨盆鳍射线和仅圆锥齿的结合,也将新物种与同类动物区分开。摘要-Xenurobryconini部落的一种新鱼类,Glandulocaudinae子科,Xenurobrycon coracoralinae,在巴西的阿拉瓜河流域有6种。该新物种与该属的其他物种的区别在于,它仅在雄性肛门鳍的最后一条非分支射线和前四个(很少是五个)分支射线中具有钩。新物种与同类动物的区别在于,在尾鳍的主半径18中不存在半圆形的襟翼并增加了鳍,并且存在七个骨盆射线和仅锥形的牙齿。

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