Melo Bruno F, Conde-Saldaña Cristhian C, Villa-Navarro Francisco A, McMahan Caleb D, Oliveira Claudio
Department of Ichthyology, American Museum of Natural History, New York, New York, USA.
Facultad de Ciencias, Universidad del Tolima, Ibagué, Tolima, Colombia.
J Fish Biol. 2024 Jul;105(1):314-325. doi: 10.1111/jfb.15777. Epub 2024 May 16.
Phylogenetic analyses of mitochondrial and nuclear data of 31 specimens of Cyphocharax from trans-Andean rivers support the presence of one lineage of Cyphocharax aspilos in Lago Maracaibo and three cryptic lineages of Cyphocharax magdalenae: (1) Cauca-Magdalena and Ranchería, (2) León and Atrato, and (3) Chucunaque-Tuira, Santa María, and Chiriquí basins of Central America. Results suggest that the Serranía del Perijá facilitated Late Miocene cladogenetic events, whereas post-Isthmian C. magdalenae expansion was enabled by gene flow across the lower Magdalena valley and Central American lowlands. Time-calibrated phylogenetics indicate that the C. magdalenae colonized lower Central America in the Pliocene (3.7 MYA; Ma), the divergence Atrato-Magdalena occurred in Late Pliocene (3.0 Ma) and the split Ranchería-Magdalena during the Middle Pleistocene (1.3 Ma). Updated geographic distribution data support the hypothesis that the Cordillera de Talamanca functions as a barrier to northward expansion of C. magdalenae in Central America.
对来自安第斯山脉以西河流的31个锯唇脂鲤属标本的线粒体和核数据进行的系统发育分析表明，马拉开波湖存在一个锯唇脂鲤谱系，以及马格达莱纳锯唇脂鲤的三个隐存谱系：(1)考卡-马格达莱纳河和兰切里亚河；(2)莱昂河和阿特拉托河；(3)中美洲的楚库纳克-图伊拉河、圣玛丽亚河和奇里基河盆地。结果表明，佩里哈山脉促进了晚中新世的分支发生事件，而地峡形成后的马格达莱纳锯唇脂鲤扩张是通过跨马格达莱纳河下游谷地和中美洲低地的基因流动实现的。时间校准的系统发育学表明，马格达莱纳锯唇脂鲤在晚上新世（370万年前；百万年）殖民了中美洲低地，阿特拉托河-马格达莱纳河的分歧发生在晚上新世（300万年前），兰切里亚河-马格达莱纳河的分裂发生在中更新世（130万年前）。更新的地理分布数据支持了塔拉曼卡山脉对马格达莱纳锯唇脂鲤在中美洲向北扩张起到屏障作用的假说。
