Andre L. Netto-Ferreira, Acacio F. Nogueira, Bruno F. Melo, Guilherme M. Dutra
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引用次数: 0
摘要
本文描述了来自亚马孙河流域 Rio Xingu 的一种箭鱼属新物种 Cyphocharax。该物种很容易与同属物种区分开来，因为其尾足上有一个深色的圆形斑点，而且身体腹侧部分的虹彩体密度很高，形成了强烈的反阴影图案。分子系统学分析支持对这一新种的确认，并表明它嵌套在 Curimatella alburna 支系中。祖先状态重建表明，胭脂鱼的尾柄有斑点和腹侧有反阴影是两个独立的进化起源。
A New Species of Cyphocharax Fowler (Teleostei: Curimatidae) from the Rio Xingu, Brazil
A new species of the curimatid genus Cyphocharax is described from the Rio Xingu, Amazon basin. This species is readily distinguished from congeners by the presence of a dark, round blotch on the caudal peduncle and by the high density of iridophores on the ventrolateral portion of the body, resulting in a strongly countershaded pattern. Molecular phylogenetic analyses support the recognition of the new species and suggest that it is nested within the Curimatella alburna clade. Ancestral state reconstruction suggests independent evolutionary origins of the blotched caudal peduncle and the countershaded ventrolateral flanks among curimatid fishes.
期刊介绍：
The Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology.
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