Rangel-Medrano José D, Ortega-Lara Armando, Márquez Edna J
Facultad de Ciencias, Escuela de Biociencias, Laboratorio de Biología Molecular y Celular, Universidad Nacional de Colombia-Sede Medellín, Medellín, Colombia.
Grupo de Investigación en Peces Neotropicales, Fundación para la Investigación y el Desarrollo Sostenible (FUNINDES), Cali, Colombia.
PeerJ. 2020 May 29;8:e9028. doi: 10.7717/peerj.9028. eCollection 2020.
is a Neotropical genus of bumblebee catfish, composed of four valid species occurring in both - and -Andean rivers of South America. The orogeny of the Andes has led to diversification in the genus in Colombia. This study analyzed partial sequences of mitochondrial and nuclear genes to test the hypothesis that the species, nominally recognized as and in Colombia, correspond to more than two different evolutionary lineages. Results indicate high levels of genetic divergence among individuals of nominal and from - and -Andean basins in Colombia. In addition, five divergent lineages of were confidently delimited by using a single-locus species-discovery approach and confirmed by species tree analyses. Additionally, molecular-clock dating showed that most diversification processes in took place during the Miocene, when Andean tectonic evolution was occurring in northwestern South America. The present study provides, for the first time, phylogeographic insight into this Neotropical genus.
是新热带地区的一个蟾胡子鲶属，由四个有效物种组成，分布于南美洲的亚马逊河和安第斯山脉河流。安第斯山脉的造山运动导致了该属在哥伦比亚的多样化。本研究分析了线粒体和核基因的部分序列，以检验在哥伦比亚名义上被认定为[具体物种名1]和[具体物种名2]的物种对应于两个以上不同进化谱系的假设。结果表明，来自哥伦比亚亚马逊河和安第斯山脉流域的名义上的[具体物种名1]和[具体物种名2]个体之间存在高度的遗传差异。此外，通过单基因座物种发现方法可靠地界定了五个不同的[该属物种名]谱系，并通过物种树分析得到证实。此外，分子钟定年显示，该属的大多数多样化过程发生在中新世，当时南美洲西北部正在发生安第斯构造演化。本研究首次提供了对这个新热带属的系统地理学见解。
