Data from: Phylogeny of the island archipelago frog genus Sanguirana: another endemic Philippine radiation that diversified 'Out-of-Palawan'

Recent higher-level frog phylogenetic analyses have included a few members of the endemic Philippine frog genus Sanguirana. Although the monophyly of the group has never been disputed, the recent phylogenetically-supported inclusion of the Palawan Wood Frog (Sanguirana sanguinea) in this clade was highly unexpected. In addition, species boundaries and relationships remain unclear and new species continue to be discovered. We estimate the phylogeny for this endemic Philippine genus using two mitochondrial gene regions and six nuclear loci and complete sampling for all known species. We use a time-calibrated Bayesian estimate of phylogeny and model-testing approach to biogeographic inference to infer ancestral areas and probable means of diversification. These analyses identify Sanguirana as an additional clade for which the biogeographic ‘Out-of-Palawan’ biogeographic scenario is unambiguously preferred. This study lends additional support to recent work suggesting that a substantial portion of Philippine vertebrate megadiversity originated via colonization of the archipelago from the Palawan microcontinent, with subsequent invasion of oceanic islands (e.g., range expansion over Huxley’s Modification of Wallace’s Line), numerous instances of overwater dispersal, and geographic radiation across the archipelago.

近期的蛙类高阶系统发育分析已纳入数种菲律宾特有蛙属*Sanguirana*的成员。尽管该类群的单系性从未受到质疑，但近期通过系统发育分析支持将巴拉望林蛙（*Sanguirana sanguinea*）归入该演化支的结论却颇出人意料。此外，该类群的物种边界与系统发育关系仍不明确，新种仍持续被发现。本研究采用两个线粒体基因区域与六个核基因座，对所有已知物种进行完整采样，以此重建该菲律宾特有蛙属的系统发育关系。我们使用时间校准的贝叶斯系统发育估计方法，并结合模型检验的生物地理学推断策略，以推测其祖先分布区与可能的物种分化途径。上述分析确认*Sanguirana*为一个独立演化支，且"源自巴拉望"的生物地理情景被明确认定为该类群的最优演化情景。本研究进一步支持了近期相关研究的结论：菲律宾群岛相当大比例的脊椎动物巨型多样性起源于巴拉望微大陆对该群岛的殖民事件，后续通过入侵大洋岛屿（例如跨越赫胥黎修正的华莱士线实现分布范围扩张）、多次跨海扩散，以及群岛内的地理辐射分化，最终形成当前的物种格局。