首次三维重建白垩纪蟋蟀化石的雄性生殖器:通过将新化石纳入其系统发育和全证据年代测定法,深入研究蟋蟀科(直翅目:蝼蛄科)的进化史

IF 4.7 1区 农林科学 Q1 ENTOMOLOGY Systematic Entomology Pub Date : 2024-02-27 DOI:10.1111/syen.12625
Jules Ferreira, Laure Desutter-Grandcolas, André Nel, Hugo Josse, Lucas Denadai de Campos
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引用次数: 0

摘要

化石是其所属支系进化历史的宝贵指标,尤其是当它们作为末级类群被纳入总证据系统发育时。根据化石的保存状况,对其关键形态特征(如生殖器结构)的描述往往不完整。本文首次利用三维显微层析技术重建了白垩纪琥珀中雄性蟋蟀化石†Picogryllus carentonensis Josse & Desutter-Grandcolas(Oecanthidae,Podoscirtinae)的生殖器内部结构及其他关键形态特征(即中跖结构和胫骨骨刺)。结合形态学数据(化石和现生类群)、分子数据(仅现生类群)和时间校准(化石年代)进行了全证据系统发育和年代测定,以评估蟋蟀科的演化速度和模式。通过对系统发生形态分区的分析,对分化时间的估计进行了改进,并对关键形态结构的转变模式进行了对比。我们的研究结果表明,蟋蟀科的历史可以追溯到上侏罗世(牛津纪,约 162 Ma),并证明了下白垩世期间西欧存在荚膜蟋蟀科(Podoscirtinae)。形态进化的驱动力可能是新资源的征服(如祖先 Oecanthidae 的腿部进化所示)和/或 "沉默的征服"(如声学结构的重复性和确定性损失所示)。相比之下,生殖器的进化则更为分散。
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First 3D reconstruction of the male genitalia of a Cretaceous fossil cricket: Diving into the evolutionary history of the Oecanthidae family (Orthoptera: Grylloidea) with the incorporation of new fossils in its phylogeny and a total-evidence dating approach

Fossils are valuable indicators of the evolutionary history of the clades to which they belong to, especially when they are incorporated as terminal taxa in a total-evidence phylogeny. According to their state of preservation, fossils are often incompletely described for key morphological characters, such as genitalic structures. Here, the internal parts of the genitalia of a male fossil cricket from Cretaceous amber, †Picogryllus carentonensis Josse & Desutter-Grandcolas (Oecanthidae, Podoscirtinae), together with other key morphological characters (i.e., metanotal structures and tibial spurs), were reconstructed for the first time by 3D microtomography. Total-evidence phylogeny and dating combining morphological data (fossils and extant taxa), molecular data (extant taxa only) and time calibration (fossil dates) were performed to evaluate the tempo and mode of evolution of the cricket family Oecanthidae. Divergence time estimates were thus refined and the patterns of transformation for key morphological structures contrasted through the analysis of phylogenetic morphological partitions. Our results show that Oecanthidae date back to the Upper Jurassic (Oxfordian, around 162 Ma) and attest to the presence of the Podoscirtinae in Western Europe during the Lower Cretaceous. Morphological evolution may have been driven by the conquest of new resources (as shown by leg evolution in ancestral Oecanthidae) and/or the ‘conquest of silence’ (as shown by repetitive and definitive losses of acoustic structures). By contrast, genitalia evolution proved more diffuse.

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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.
期刊最新文献
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