Abstract：
Species of the catfish genus Rineloricaria are common in the Paraíba do Sul River basin, in southeastern Brazil; here we present a revision of the taxonomic diversity and geographic distribution of the species of the genus inhabiting the basin, based on novel morphologic and molecular data. Five species delimitation methods based on cytochrome C oxidase subunit 1 nucleotide sequences yielded comparable molecular operational taxonomic units. The automatic barcode gap discovery, assemble species by automatic partitioning, barcode index number, and Bayesian implementation of the Poisson tree process methods supported the recognition of five evolutionary lineages. These taxonomic units were assigned to the previously described Rineloricaria nigricauda, Rineloricaria steindachneri, Rineloricaria zawadzkii, and Rineloricaria nudipectoris, and an additional undescribed species. R. zawadzkii was further divided into two intraspecific geographically structured lineages using the generalized mixed Yule coalescent delimitation method. A maximum likelihood phylogenetic analysis revealed that the five lineages from the Paraíba do Sul have closer relationships to different species from southern and southeastern Brazil (Ribeira de Iguape, Lagoa dos Patos, Uruguay, Paraguay, and Parana river basins) than to each other. Based on the analysis of lectotypes, recently collected material, and specimens from ichthyological collections, the poorly described R. nigricauda and R. steindachneri are redescribed following current descriptive standards. The undescribed species from the middle and upper Paraíba do Sul River basin is formally described. The description of a new species, along with the description of species boundaries in R. nigricauda and R. steindachneri, contributes to the knowledge of the ichthyofauna of the Paraíba do Sul River basin and adjacent coastal drainages of southeastern Brazil. An identification key for the species of Rineloricaria occurring in the Paraíba do Sul River basin is provided.
摘要：
in鱼属Rineloricaria的物种在Sul河流域很常见，在巴西东南部；在这里，我们对居住在盆地的属物种的分类学多样性和地理分布进行了修订，基于新的形态学和分子数据。基于细胞色素C氧化酶亚基1核苷酸序列的五种物种定界方法产生了可比的分子操作分类单位。自动发现条形码间隙，通过自动分区组装物种，条形码索引号,泊松树过程方法的贝叶斯实现支持五个进化谱系的识别。这些分类单位被分配给先前描述的黑龙，Rineloricariasteindachneri,Rineloricariazawadzkii,和裸眼Rineloricaria,还有一个没有描述的物种。使用广义的混合Yule合并定界方法将R.zawadzkii进一步分为两个种内地理结构的谱系。最大可能性系统发育分析显示，南Paraíba的五个谱系与巴西南部和东南部的不同物种有更紧密的关系（RibeiradeIguape，LagoadosPatos,乌拉圭,巴拉圭,和巴拉那河流域）比彼此。根据对样品的分析,最近收集的材料，和鱼类学收藏的标本，根据当前的描述性标准重新描述了描述不佳的R.nigricauda和R.steindachneri。正式描述了来自Sul河中上游Paraíbado流域的未描述物种。一个新物种的描述，以及对黑龙和R.Steindachneri物种边界的描述，有助于了解SulParaíbadoRiver流域和巴西东南部邻近的沿海排水沟。提供了在Sul河流域发生的Rineloricaria物种的识别密钥。
