Permian parallelisms: Reanalysis of †Tshekardocoleidae sheds light on the earliest evolution of the Coleoptera

IF 4.7 1区 农林科学 Q1 ENTOMOLOGY
Brendon Elias Boudinot, Evgeny Viktorovich Yan, Jakub Prokop, Xiao-Zhu Luo, Rolf Georg Beutel
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引用次数: 10

Abstract

The Coleoptera provides an excellent example of the value of fossils for understanding the evolutionary patterns of recent lineages. We reevaluate the morphology of the Early Permian †Tshekardocoleidae to test alternative phylogenetic hypotheses relating to the Palaeozoic evolution of the order. We discuss prior interpretations and revise an earlier data matrix. Both Bayesian and parsimony analyses support the monophyly of Coleoptera excluding †Tshekardocoleidae (= Mesocoleoptera), and of Coleoptera excluding †Tshekardocoleidae and †Permocupedidae (= Metacoleoptera). Plesiomorphies preserved in †Tshekardocoleidae are elytra, which rest over the body in a loose tent-like manner, with flat lateral flanges, projecting beyond the abdominal apex, and abdomens that are flexible and nearly cylindrical. Apomorphies of Mesocoleoptera include shortening of the elytra and a closer fit with the flattened and probably more rigid abdomen. A crucial synapomorphy of Metacoleoptera is the tightly sealed subelytral space, which may have been advantageous during the Permian aridification. Taxon exclusion experiments show that †Tshekardocoleidae is crucial for understanding the early evolution of Coleoptera and that its omission strongly affects ancestral state polarities as well as topology, including crown-group taxa. By constraining the relationships of extant taxa to match those supported by phylogenomic analysis, we demonstrate that features shared by Archostemata with Permian stem groups are most reasonably supported as plesiomorphic and that the smooth and simplified body forms of Polyphaga, Adephaga, Myxophaga, and Micromalthidae were derived in parallel. Our study highlights the reciprocal illumination of molecular, morphological, and paleontological data, and paves the way for tip-dating analysis across the order.

Abstract Image

二叠纪的平行性:对†Tshekardocoleidae的重新分析揭示了鞘翅目的早期进化
鞘翅目为了解最近谱系的进化模式提供了化石价值的一个极好的例子。我们重新评估了早二叠世†Tshekardocoleidae的形态,以测试与该目古生代进化有关的其他系统发育假说。我们讨论了先前的解释,并修订了先前的数据矩阵。贝叶斯分析和简约分析都支持鞘翅目(不包括†Tshekardocoleidae(=中鞘翅目))和鞘翅目的单系性,其中†Tschekardocoliidae和†Permocupedidae(=Metacoleoptera)除外。†Tshekardocoleidae中保存的蛇颈虫是鞘翅,以松散的帐篷状方式栖息在身体上,具有平坦的侧凸缘,突出超过腹尖,腹部柔韧且几乎呈圆柱形。中鞘翅目的变形包括鞘翅缩短,与扁平且可能更坚硬的腹部更紧密地贴合。Metacoleoptera的一个重要突触形态是紧密密封的膜下空间,这可能在二叠纪干旱化期间是有利的。紫杉醇排除实验表明,†Tshekardocoleidae对于理解鞘翅目的早期进化至关重要,其遗漏强烈影响祖先状态极性和拓扑结构,包括冠群分类群。通过将现存分类群的关系限制为与系统发育学分析支持的关系相匹配,我们证明了长骨目与二叠纪茎群共有的特征最合理地支持为类同形态,并且Polyphaga、Adephaga、Myxophaga和Micromalthidae的光滑和简化的体型是平行衍生的。我们的研究强调了分子、形态学和古生物学数据的相互启发,并为整个目的尖端年代测定分析铺平了道路。
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来源期刊
Systematic Entomology
Systematic Entomology 生物-进化生物学
CiteScore
10.50
自引率
8.30%
发文量
49
审稿时长
>12 weeks
期刊介绍: Systematic Entomology publishes original papers on insect systematics, phylogenetics and integrative taxonomy, with a preference for general interest papers of broad biological, evolutionary or zoogeographical relevance.
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