ABSTRACT A new species of Hyphessobrycon is described from the middle and lower rio Xingu Basin, Pará state, Brazil. The new species can be distinguished from all congeners by the combination of a large caudal peduncle blotch (largest in mature males), absence of humeral blotch, and largest teeth on dentary, inner premaxillary and maxillary relatively compressed with 6-9 cusps. The new species is compared to three other congeners with similar color pattern: Hyphessobrycon diastatos Dagosta, Marinho & Camelier 2014, Hy. negodagua Lima & Gerhard 2001, and Hy. parvellus Ellis 1911, and one species of Hemigrammus, He. rodwayi Durbin 1909.

中文翻译：

---

来自巴西里约兴谷盆地的一种新的 Hyphessobrycon（Characiformes：Characidae）

摘要 描述了来自巴西帕拉州新古盆地中下游的一个新种 Hyphessobrycon。新种可以通过大尾柄斑点（成熟雄性中最大）、没有肱骨斑点以及齿状、内前上颌骨和上颌骨上最大的牙齿与 6-9 个牙尖相对压缩的组合而与所有同类区分开来。将新物种与具有相似颜色图案的其他三个同类进行比较：Hyphessobrycon diastatos Dagosta、Marinho & Camelier 2014、Hy。negodagua Lima & Gerhard 2001，以及 Hy。parvellus Ellis 1911，以及 Hemigrammus 的一种。罗德威·德宾 1909。