Data from: Molecular data and distribution dynamics indicate a recent and incomplete separation of manakins species of the genus Antilophia (Aves: Pipridae) in response to Holocene climate change

To determine a hypothetical scenario that accounts for the diversification of the two species of the genus Antilophia, we conducted multilocus molecular comparisons and species distribution modeling for the two taxa, which have distinct male plumage coloration patterns and allopatric geographic distributions, despite the high degree of genetic similarity indicated by recent studies. Three mitochondrial and three nuclear fragments were analyzed. The results indicate clear differences in the genetic diversity of the two species, but with ample sharing of haplotypes in all the markers analyzed, reflecting the absence of reciprocal monophyly, presumably due to the relatively recent and still incomplete separation of the two species. The paleoclimatic distribution models, together with the observed genetic profile indicate a recent process of divergence by geographic isolation in the ancestral populations of the two species. This scenario coincides with the recent climatic events of the South American dry diagonal, which involves the gallery forests of the Cerrado biome and the cloud forest enclaves of the seasonal tropical dry forest of the Caatinga between the late Pleistocene and the mid Holocene.

为解析安蒂洛菲亚属（Antilophia）两个物种的分化成因这一假想情景，我们针对这两个类群开展了多位点分子比较（multilocus molecular comparisons）与物种分布模型（species distribution modeling）分析。尽管近期研究显示二者遗传相似度极高，但这两个类群的雄性羽色模式截然不同，且呈异域地理分布。本研究共分析了3个线粒体基因片段与3个核基因片段。结果表明，两个物种的遗传多样性存在显著差异，但所有分析标记中均存在大量共享单倍型（haplotypes），这反映二者尚未形成互单系群（reciprocal monophyly），推测其原因为两个物种的分化时间较近，且物种分离过程尚未完全完成。古气候分布模型（paleoclimatic distribution models）与观测到的遗传特征共同证实，两个物种的祖先种群在近期经历了由地理隔离（geographic isolation）驱动的分化进程。该情景与南美干旱对角带（South American dry diagonal）在晚更新世（late Pleistocene）至中全新世（mid Holocene）期间的新近气候事件相吻合，该区域涵盖塞拉多生物群区（Cerrado biome）的长廊林，以及卡廷加季节性热带干旱森林中的云林孤岛。