Marjorie Barrick Museum of Natural History, University of Nevada, Las Vegas, 4505 S. Maryland Parkway, Las Vegas, NV 89154-4012, USA.
Mol Phylogenet Evol. 2013 Mar;66(3):1055-9. doi: 10.1016/j.ympev.2012.11.016. Epub 2012 Dec 3.
We investigated species relationships and timing of speciation in North American Haemorhous finches by using a mitochondrial phylogeographic approach combined with a multilocus species tree reconstruction. Haemorhous purpureus and H. cassinii were strongly supported as sister taxa, and H. mexicanus was sister to H. purpureus+H. cassinii. Our divergence times indicated that diversification within Haemorhous occurred progressively from the Late Miocene into the Pleistocene. Our inferred pattern of speciation demonstrates the complexity of the origins of North American birds, and provides additional evidence that a single cause for speciation in closely related North American birds, such as Late Pleistocene glacial-interglacial cycles, is unlikely.
我们通过使用线粒体系统地理学方法结合多基因种系发生树重建来研究北美的 Haemorhous finches 的物种关系和物种形成时间。Haemorhous purpureus 和 H. cassinii 被强烈支持为姐妹分类群，而 H. mexicanus 则与 H. purpureus+H. cassinii 为姐妹分类群。我们的分歧时间表明，Haemorhous 内部的多样化是从中新世晚期逐渐进入更新世的。我们推断的物种形成模式展示了北美的鸟类起源的复杂性，并提供了更多证据表明，对于北美密切相关的鸟类来说，单一的物种形成原因（例如更新世晚期的冰期-间冰期循环）不太可能。
