A new species of Trichomycterus endemic endemic to the Ribeira de Iguape River basin, southeastern Brazil, is proposed based on morphological and molecular evidence. The new species is diagnosed by having the outer layer of coloration composed of scattered, round, black or dark brown spots smaller or equivalent in size to the eye circumference, eight pectoral-fin rays, 28-29 opercular odontodes, 54-56 interopercular odontodes; and supraorbital line of the laterosensory system not interrupted, with pores s2 absent. Other two species of Trichomycterus are recorded for the Ribeira de Iguape River basin and their taxonomic status discussed: T. alternatus and T. jacupiranga were not differentiated by our molecular analysis, but may be consistently distinguished with basis on morphology. The phylogenetic relationships of the co-occuring species, Trichomycterus alternatus and Cambeva zonata, is inferred using mitochondrial data, reinforcing the taxonomic status of these recently revised species that have a confuse taxonomy. Additionally, we recommend a new combination for Trichomycterus taroba with its inclusion in the genus Cambeva. This article is protected by copyright. All rights reserved.

中文翻译：

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来自 Ribeira de Iguape 河流域的 Trichomycterus（Siluriformes：Trichomycteridae）的分类学研究揭示了 20 世纪初记录的一个新物种

基于形态学和分子证据，提出了巴西东南部里贝拉德伊瓜佩河流域特有的一种新的地方性毛霉菌种。新物种的诊断依据是外层颜色由散在的、圆形、黑色或深褐色斑点组成，其大小与眼围较小或相等，8 条胸鳍条，28-29 条鳃盖齿突，54-56 条鳃盖间齿突; 和外侧感觉系统的眶上线没有中断，没有孔 s2。在 Ribeira de Iguape 河流域记录了另外两个 Trichomycterus 物种，并讨论了它们的分类地位：我们的分子分析未区分 T. alternatus 和 T. jacupiranga，但可以通过形态学一致区分。共生物种的系统发育关系，Trichomycterus alternatus 和 Cambeva zonata 是使用线粒体数据推断出来的，加强了这些最近修订的具有混淆分类法的物种的分类学地位。此外，我们建议将 Trichomycterus taroba 纳入 Cambeva 属的新组合。本文受版权保护。版权所有。