Vilardo Paulo J, Katz Axel M, Costa Wilson J E M
Laboratory of Systematics and Evolution of Teleost Fishes, Institute of Biology, Federal University of Rio de Janeiro, Caixa Postal 68049, CEP 21941-971, Rio de Janeiro, Brazil. E-mail:
Zool Stud. 2020 Nov 10;59:e53. doi: 10.6620/ZS.2020.59-53. eCollection 2020.
A phylogenetic analysis using fragments of two nuclear and two mitochondrial genes strongly supported sister group relationships between a new species and , corroborated by unique colour patterns of adult specimens and juveniles, and morphology of the autopalatine bone. The new species is distinguished from its closest congener, , by details of the colouration and number of branchiostegal rays. Both the new species and are endemic to the Rio Paraíba do Sul basin, in the Atlantic Forest of south-eastern Brazil, but occur in distant and disjunct areas. The new species, herein described, is endemic to the upper section of the Rio Grande drainage, a right tributary of the lower Rio Paraíba do Sul, an area situated in the Órgãos Mountain Range. is endemic to an area about 200 km across, in the upper section of the Rio Preto that drains the Itatiaia Massif. However, both species are only known from localities above 1100 m asl, suggesting that they cannot survive in ecological conditions at lower altitudes. This study indicates that efforts are necessary to provide more accurate data on the species diversity and distribution of in the biologically diverse and endangered Atlantic Forest of south-eastern Brazil.
利用两个核基因片段和两个线粒体基因片段进行的系统发育分析有力地支持了一个新物种与[另一物种名称未给出]之间的姐妹群关系，成年标本和幼体独特的颜色模式以及自腭骨的形态也证实了这一点。新物种与其最接近的同属物种[另一物种名称未给出]的区别在于其颜色细节和鳃盖条的数量。新物种和[另一物种名称未给出]均为巴西东南部大西洋森林里约帕拉伊巴杜尔流域特有的物种，但分布在遥远且不连续的区域。本文描述的新物种是里约格兰德排水流域上游的特有物种，里约格兰德是里约帕拉伊巴杜尔下游的一条右支流，该区域位于奥加奥斯山脉。[另一物种名称未给出]是里约普雷托上游一个约200公里宽区域的特有物种，该区域排水伊塔蒂亚伊地块。然而，这两个物种仅在海拔1100米以上的地区被发现，这表明它们无法在较低海拔的生态条件下生存。这项研究表明，有必要努力提供关于巴西东南部生物多样且濒危的大西洋森林中[物种名称未给出]的物种多样性和分布的更准确数据。
