Multiple lineages of lice pass through the K-Pg boundary
Multiple lineages of lice pass through the K-Pg boundary
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DOI：
10.1098/rsbl.2011.0105
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发表时间：
2011-10-23
期刊：
影响因子：
3.3
通讯作者：
Light, Jessica E.
中科院分区：
文献类型：
--
作者：
Smith, Vincent S.;Ford, Tom;Light, Jessica E.
对于鸟类和哺乳动物的现代谱系，很少发现早于白垩纪-古近纪（K-Pg）边界的化石。然而，利用化石校准进行的分子研究表明，许多谱系在当时就已经存在。鸟类和哺乳动物都被专性外寄生虱子（昆虫纲：Phthiraptera）寄生，它们与宿主有着悠久的共同进化历史。评估许多虱子谱系是否穿过 K-Pg 边界将有助于深入了解其宿主的辐射。使用分子测年技术，我们证明主要虱子亚目在 K-Pg 边界之前开始辐射。这些数据支持了许多现代鸟类和哺乳动物谱系的白垩纪多样化。
For modern lineages of birds and mammals, few fossils have been found that predate the Cretaceous-Palaeogene (K-Pg) boundary. However, molecular studies using fossil calibrations have shown that many of these lineages existed at that time. Both birds and mammals are parasitized by obligate ectoparasitic lice (Insecta: Phthiraptera), which have shared a long coevolutionary history with their hosts. Evaluating whether many lineages of lice passed through the K-Pg boundary would provide insight into the radiation of their hosts. Using molecular dating techniques, we demonstrate that the major louse suborders began to radiate before the K-Pg boundary. These data lend support to a Cretaceous diversification of many modern bird and mammal lineages.