An ant genus-group (Prenolepis) illuminates the biogeography and drivers of insect diversification in the Indo-Pacific
An ant genus-group (Prenolepis) illuminates the biogeography and drivers of insect diversification in the Indo-Pacific
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DOI：
10.1016/j.ympev.2018.02.007
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发表时间：
2018-06-01
影响因子：
4.1
通讯作者：
Janda, Milan
中科院分区：
文献类型：
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作者：
Matos-Maravi, Pavel;Clouse, Ronald M.;Janda, Milan
马来群岛和热带南太平洋（以下简称印度洋-太平洋地区）被认为是生物多样性热点，但对该地区物种丰富群体的起源和多样化的一般理解仍然难以捉摸。我们的目的是测试假设的进化过程中驱动昆虫物种多样性在印度-太平洋地区使用更高层次和全面的系统发育假说的蚂蚁分支组成的七个属。我们估计分歧的时间和重建Prenolepis属组（蚁科：蚁科：Lasiini）的蚂蚁物种的地理历史。我们使用了化石校准的物种发生来推断祖先的地理范围，利用包括创始人事件物种形成的地理模型。祖先状态重建的蚂蚁的生态偏好，和多样化率估计选定的印度太平洋分支。总的来说，我们报告说，亚洲和澳大利亚之间的动物群交换至少发生在20-25 Ma，早期分散到斐济盆地发生在早中新世和中中新世（约20 - 25 Ma）。10-20 Ma）。在印度-太平洋分支的多样化率的差异可能与生态偏好的广度，这反过来又可能促进了地理范围的扩大。我们的研究结果建议的古代传播路线同意该地区的古地理。对于这种特殊的蚂蚁群体来说，新几内亚的快速造山作用以及随后可能发生的生态变化可能促进了它们在印度-太平洋地区的快速多样化和广泛分布。
The Malay Archipelago and the tropical South Pacific (hereafter the Indo-Pacific region) are considered biodiversity hotspots, yet a general understanding of the origins and diversification of species-rich groups in the region remains elusive. We aimed to test hypotheses for the evolutionary processes driving insect species diversity in the Indo-Pacific using a higher-level and comprehensive phylogenetic hypothesis for an ant clade consisting of seven genera. We estimated divergence times and reconstructed the biogeographical history of ant species in the Prenolepis genus-group (Formicidae: Formicinae: Lasiini). We used a fossil-calibrated phylogeny to infer ancestral geographical ranges utilizing a biogeographic model that includes founder-event speciation. Ancestral state reconstructions of the ants' ecological preferences, and diversification rates were estimated for selected Indo-Pacific clades. Overall, we report that faunal interchange between Asia and Australia has occurred since at least 20-25 Ma, and early dispersal to the Fijian Basin happened during the early and mid-Miocene (ca. 10-20 Ma). Differences in diversification rates across Indo-Pacific clades may be related to ecological preference breadth, which in turn may have facilitated geographical range expansions. Ancient dispersal routes suggested by our results agree with the palaeogeography of the region. For this particular group of ants, the rapid orogenesis in New Guinea and possibly subsequent ecological shifts may have promoted their rapid diversification and widespread distribution across the Indo-Pacific.