Biogeography and evolution of social parasitism in Australian Myrmecia bulldog ants revealed by phylogenomics
Biogeography and evolution of social parasitism in Australian Myrmecia bulldog ants revealed by phylogenomics
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DOI：
10.1016/j.ympev.2023.107825
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发表时间：
2023-06-08
影响因子：
4.1
通讯作者：
Rabeling，Christian
中科院分区：
文献类型：
--
作者：
Mera-Rodriguez，Daniela;Jourdan，Herve;Rabeling，Christian
研究从真社会性群体生活到社会寄生的历史地理和生活史转变有助于我们理解真社会性昆虫生物多样性产生的进化机制。Myrmecia属的蚂蚁是一个非常适合的系统，用于测试关于其物种多样性如何随着时间的推移而组装的进化假设，因为该属是澳大利亚特有的，只有M种例外。apicalis栖息在太平洋岛屿新喀里多尼亚，因为至少有一个社会寄生虫物种存在于属。然而，M. apicalis和生活史过渡（S）社会寄生仍然没有探索。研究了分离的海洋种的地理起源。apicalisand揭示社会寄生在该属的起源和进化，我们重建了一个全面的系统发育Myrmeciinae。我们利用超保守元件（UCEs）作为分子标记，以产生一个分子遗传数据集，每个分类单元的2,287个位点，平均为66个已知的Myrmeciaspecies以及姐妹lineageNothomyrmeciamacropsand选定的外类群。我们的时间校准的系统发育推断：（i）干Myrmeciinae起源于158 Ma前的古新世; apicalis是在中新世14 Ma前从澳大利亚到新喀里多尼亚的长距离扩散驱动的; inquilina，直接由已知的两种寄主之一M. nigriceps，在同域通过种内的社会寄生虫进化的路线;和（四）5 9个先前建立的分类学种组是非单系的。我们建议轻微的变化，以调和分子系统发育的结果与分类学分类。我们的研究增强了我们对澳大利亚斗牛犬蚁的进化和进化史的理解，有助于我们了解蚂蚁社会寄生的进化，并为未来的生物学，分类学和Myrmeciinae分类的研究提供了坚实的系统发育基础。
Studying the historical biogeography and life history transitions from eusocial colony life to social parasitism contributes to our understanding of the evolutionary mechanisms generating biodiversity in eusocial insects. The ants in the genusMyrmeciaare a well-suited system for testing evolutionary hypotheses about how their species diversity was assembled through time because the genus is endemic to Australia with the single exception of the speciesM. apicalisinhabiting the Pacific Island of New Caledonia, and because at least one social parasite species exists in the genus. However, the evolutionary mechanisms underlying the disjunct biogeographic distribution ofM. apicalisand the life history transition(s) to social parasitism remain unexplored. To study the biogeographic origin of the isolated, oceanic speciesM. apicalisand to reveal the origin and evolution of social parasitism in the genus, we reconstructed a comprehensive phylogeny of the ant subfamily Myrmeciinae. We utilized Ultra Conserved Elements (UCEs) as molecular markers to generate a molecular genetic dataset consisting of 2,287 loci per taxon on average for 66 out of the 93 knownMyrmeciaspecies as well as for the sister lineageNothomyrmecia macropsand selected outgroups. Our time-calibrated phylogeny inferred that: (i) stem Myrmeciinae originated during the Paleocene ∼ 58 Ma ago; (ii) the current disjunct biogeographic distribution ofM. apicaliswas driven by long-distance dispersal from Australia to New Caledonia during the Miocene ∼ 14 Ma ago; (iii) the single social parasite species,M. inquilina, evolved directly from one of the two known host species,M. nigriceps, in sympatry via the intraspecific route of social parasite evolution; and (iv) 5 of the 9 previously established taxonomic species groups are non-monophyletic. We suggest minor changes to reconcile the molecular phylogenetic results with the taxonomic classification. Our study enhances our understanding of the evolution and biogeography of Australian bulldog ants, contributes to our knowledge about the evolution of social parasitism in ants, and provides a solid phylogenetic foundation for future inquiries into the biology, taxonomy, and classification of Myrmeciinae.