Natural History Museum and Biodiversity Institute, Dyche Hall, University of Kansas, 1345 Jayhawk Blvd., Lawrence, KS 66045-7561, USA.
Mol Phylogenet Evol. 2011 Nov;61(2):290-9. doi: 10.1016/j.ympev.2011.06.013. Epub 2011 Jun 22.
Islands have long-attracted scientists because of their relatively simple biotas and stark geographic boundaries. However, for many islands and archipelagos, this simplicity may be overstated because of methodological and conceptual limitations when these biotas were described. One archipelago that has received relatively little recent attention is the Philippine islands. Although much of its biota was documented long ago, taxonomic revision and evolutionary study has been surprisingly scarce, and only a few molecular phylogenetic studies are beginning to appear. We present a molecular phylogeny and taxonomic revision for the Philippine fantails (Aves: Rhipidura) using nuclear and mitochondrial DNA sequences. Our results suggest that current taxonomy underestimates diversity in the group. Some morphologically distinct subspecies warrant species status, whereas one was indistinguishable genetically and morphologically and should not be retained. A few taxa require additional sampling for thorough taxonomic assessment. Patterns of diversity within Philippine Rhipidura mostly corroborate predictions of the Pleistocene aggregate island complex (PAIC) hypothesis, in which diversity is expected to be partitioned by deep water channels separating Pleistocene aggregate islands rather than by current islands. Substantial structure within PAIC clades indicates that additional drivers of diversification should be considered.
由于其相对简单的生物群和鲜明的地理边界，岛屿长期以来一直吸引着科学家。然而，对于许多岛屿和群岛来说，由于在描述这些生物群时存在方法和概念上的局限性，这种简单性可能被夸大了。一个相对较少受到关注的群岛是菲律宾群岛。尽管很久以前就记录了其大部分生物群，但分类修订和进化研究却出人意料地匮乏，只有少数分子系统发育研究才刚刚开始出现。我们使用核和线粒体 DNA 序列为菲律宾扇尾鹟（Aves: Rhipidura）提供了分子系统发育和分类修订。我们的研究结果表明，当前的分类法低估了该组的多样性。一些形态上明显不同的亚种值得被提升为物种地位，而有一种在遗传和形态上无法区分，不应保留。一些分类群需要进一步的采样以进行彻底的分类评估。菲律宾 Rhipidura 内的多样性模式大多证实了更新世聚合岛复合体（PAIC）假说的预测，即在该假说中，多样性预计将通过分隔更新世聚合岛的深水区而不是当前的岛屿来划分，而不是通过当前的岛屿来划分。PAIC 分支内的大量结构表明，应该考虑其他多样化的驱动因素。
