Argasid and ixodid systematics: Implications for soft tick evolution and systematics, with a new argasid species list
Argasid and ixodid systematics: Implications for soft tick evolution and systematics, with a new argasid species list
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DOI：
10.1016/j.ttbdis.2018.09.010
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发表时间：
2019-01-01
影响因子：
3.2
通讯作者：
Latif, Abdalla A.
中科院分区：
文献类型：
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作者：
Mans, Ben J.;Featherston, Jonathan;Latif, Abdalla A.
软蜱科属和亚属的系统划分尚未得到充分解决。不同的分类方案，反映了不同流派的科学思想，提高或降低群体的属或亚属，已提出。在最近的分类方案中，Argas和Ornithodoros是副属的，由于缺乏分子数据，各种亚属的位置仍然不确定。因此，需要重新分类甲藻科。这将使人们能够在进化的背景下理解软蜱的系统学。本研究利用线粒体基因组和核（18S和28S核核体RNA）序列数据解决了Alectorobius亚属、Argas亚属、Chiropterargas亚属、Ogadenus亚属、Ornamentum亚属、Ornithodoros亚属、Navis亚属代表的知识空白。11月),Pavlovskyella, Persicargas, Proknekalia， Reticulinasus和秘书gas，来自非洲热带，新北极和古北地区。对硬蜱种（硬蜱科）和新代表品种纳玛科（Nuttalliella namaqua）进行测序，共获得83个线粒体全基因组，生成18S rRNA和28S rRNA基因。该研究证实了下一代测序在检索系统标记物方面的实用性。通过系统分析，解决了Argas和Ornithodoros的分类学问题，并提出了新的种表。这与Klompen和Oliver（1993）的形态学分支分析大体一致。利用分子定年法估计分化时间，可以对大叶藻进化的系统地理模式进行解剖。在翼龙亚属、蛇爪龙亚属和鸟爪龙亚属中发现了隐种，表明隐种在蜘蛛科中是常见的。隐物种形成对过去软蜱的生物学研究具有启示意义。特别讨论了moubata和savignyi类鸟类的这些特征。
The systematics of the genera and subgenera within the soft tick family Argasidae is not adequately resolved. Different classification schemes, reflecting diverse schools of scientific thought that elevated or downgraded groups to genera or subgenera, have been proposed. In the most recent classification scheme, Argas and Ornithodoros are paraphyletic and the placement of various subgenera remains uncertain because molecular data are lacking. Thus, reclassification of the Argasidae is required. This will enable an understanding of soft tick systematics within an evolutionary context. This study addressed that knowledge gap using mitochondrial genome and nuclear (18S and 28S ribosomal RNA) sequence data for representatives of the subgenera Alectorobius, Argas, Chiropterargas, Ogadenus, Ornamentum, Ornithodoros, Navis (subgen. nov.), Pavlovskyella, Persicargas, Proknekalia, Reticulinasus and Secretargas, from the Afrotropical, Nearctic and Palearctic regions. Hard tick species (Ixodidae) and a new representative of Nuttalliella namaqua (Nuttalliellidae), were also sequenced with a total of 83 whole mitochondrial genomes, 18S rRNA and 28S rRNA genes generated. The study confirmed the utility of next-generation sequencing to retrieve systematic markers. Paraphyly of Argas and Ornithodoros was resolved by systematic analysis and a new species list is proposed. This corresponds broadly with the morphological cladistic analysis of Klompen and Oliver (1993). Estimation of divergence times using molecular dating allowed dissection of phylogeographic patterns for argasid evolution. The discovery of cryptic species in the subgenera Chiropterargas, Ogadenus and Ornithodoros, suggests that cryptic speciation is common within the Argasidae. Cryptic speciation has implications for past biological studies of soft ticks. These are discussed in particular for the Ornithodoros (Ornithodoros) moubata and Ornithodoros (Ornithodoros) savignyi groups.