Morais-Silva João P, Oliveira Alessandra V de, Fabrin Thomaz M C, Diamante Nathália Alves, Prioli Sônia M A P, Frota Augusto, Graça Weferson J da, Prioli Alberto J
1 Programa de Pós-graduação em Biologia Comparada, Universidade Estadual de Maringá , Maringá, Brazil .
2 Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá , Maringá, Brazil .
Zebrafish. 2018 Aug;15(4):389-397. doi: 10.1089/zeb.2017.1551. Epub 2018 Mar 13.
The current analysis investigates whether the uplift of the Serra da Esperança and the Ponta Grossa Arch in the Serra Geral resulted in ichthyofaunistic changes in adjacent basins. For this, we describe the phylogeographic structure among populations of Trichomycterus collected in hydrographic basins in southern Brazil by using partial nucleotide sequences of the mitochondrial gene Cytochrome C Oxidase subunit I. Analyses revealed that the nomenclature Trichomycterus davisi fails to contain the whole genetic diversity range found in the collected specimens and indicates at least six genetic lineages in Trichomycterus. Diagnostic morphological characteristics not associated to T. davisi could be identified in some specimens from the Iguaçu Piquiri haplogroup, indicating the occurrence of species Trichomycterus stawiarski. The lack of morphological differences among the other clades clearly suggests a cryptic species case. Molecular analyses revealed at least five new species besides T. davisi in the hydrographic basins and support the interpretation that genetic structure in T. davisi species complex is explained by tectonic events intrinsic to the areas of influence of Serra da Esperança and the Ponta Grossa Arch which occurred around 1.7 My.
当前的分析调查了埃斯佩兰萨山脉和南里奥格兰德山脉中庞塔格罗萨拱门的隆升是否导致了相邻盆地鱼类区系的变化。为此，我们通过使用线粒体基因细胞色素C氧化酶亚基I的部分核苷酸序列，描述了在巴西南部水文盆地采集的三毛鲶种群之间的系统地理学结构。分析表明，三毛鲶属的命名未能涵盖所采集标本中发现的全部遗传多样性范围，并且表明三毛鲶属中至少有六个遗传谱系。在伊瓜苏皮基里单倍群的一些标本中可以识别出与达维氏三毛鲶无关的诊断性形态特征，这表明存在斯塔维亚尔斯基三毛鲶物种。其他分支之间缺乏形态差异，这清楚地表明了一个隐存种的情况。分子分析揭示了除达维氏三毛鲶之外，在水文盆地中至少还有五个新物种，并支持这样一种解释，即达维氏三毛鲶物种复合体中的遗传结构是由大约170万年前发生的埃斯佩兰萨山脉和庞塔格罗萨拱门影响区域内的构造事件所解释的。
