Integrating palaeontological and molecular data uncovers multiple ancient and recent dispersals in the pantropical Hamamelidaceae

Aim: The integration of palaeontological and phylogenetic data can improve our understanding in the spatio-temporal evolutionary processes of living organisms. However, how best to use fossil data in divergence time estimation and ancestral range reconstruction remains challenging. Here, we integrated palaeontological and molecular data to investigate the historical biogeography of Hamamelidaceae, a pantropical angiosperm family with abundant fossils outside its present distribution. Location: Global tropical/subtropical areas. Methods: Using seven DNA regions (> 7,500 bp) from plastid and nuclear genomes, we reconstructed a robust phylogenetic framework for Hamamelidaceae with the first complete genus-level sampling. We used the tip-dating method with the 22 fossils to estimate divergence times for the family, and inferred the ancestral range of lineages under the dispersal-extinction-cladogenesis model by incorporating the fossils. Results: Our biogeographic analysis indicates t...研究目的：整合古生物学与系统发育数据，可深化我们对活生物体时空演化过程的认知。然而，如何在分化时间估算与祖先分布区重建中最优利用化石数据，仍是一项颇具挑战性的课题。本研究整合古生物学与分子数据，以金缕梅科（Hamamelidaceae）——一类在当前分布区之外留存有大量化石记录的泛热带被子植物科——为研究对象，探讨其历史生物地理学特征。 研究区域：全球热带/亚热带区域。 研究方法：本研究选取来自质体基因组与核基因组的7个DNA片段（总长超7500 bp），首次完成该科所有属级类群的完整采样，构建了稳健的系统发育框架。我们采用末端定年法（tip-dating）结合22份化石记录，估算该科的分化时间；并在扩散-灭绝-分支进化模型（dispersal-extinction-cladogenesis）框架下，整合化石数据推断各支系的祖先分布区。 研究结果：本研究的生物地理学分析显示……