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.

为阐明盔伞鸟属（Antilophia）两个物种种群分化的假想演化场景，本研究针对这两个类群开展了多位点分子比对与物种分布建模分析。二者雄性羽色模式截然不同且呈异域分布（allopatric distribution），但近期研究显示其遗传相似度极高。本研究共分析了3个线粒体基因片段与3个核基因片段，结果表明两个物种种群的遗传多样性存在显著差异，但所有检测的分子标记均存在大量单倍型（haplotype）共享现象，反映出二者尚未形成相互单系（reciprocal monophyly），推测这源于两个物种种群分化时间较近且分离过程尚未完全完成。古气候分布模型与本研究观测到的遗传特征共同表明，两个物种种群的祖先类群近期经历了地理隔离驱动的分化过程。该演化场景与南美干旱对角线带（South American Dry Diagonal）在晚更新世（late Pleistocene）至中全新世（mid Holocene）期间的近期气候事件相吻合，该区域涵盖塞拉多生物群区（Cerrado biome）的长廊林以及卡廷加（Caatinga）季节性热带旱林的云雾林飞地。