Impact of increasing morphological information by micro-CT scanning on the phylogenetic placement of Darwin wasps (Hymenoptera, Ichneumonidae) in amber.

IF 3 2区 地球科学 Q1 PALEONTOLOGY Swiss Journal of Palaeontology Pub Date : 2023-01-01 Epub Date: 2023-11-03 DOI:10.1186/s13358-023-00294-2
Alexandra Viertler, Karin Urfer, Georg Schulz, Seraina Klopfstein, Tamara Spasojevic
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引用次数: 1

Abstract

The correct interpretation of fossils and their reliable taxonomic placements are fundamental for understanding the evolutionary history of biodiversity. Amber inclusions often preserve more morphological information than compression fossils, but are often partially hidden or distorted, which can impede taxonomic identification. Here, we studied four new fossil species of Darwin wasps from Baltic and Dominican amber, using micro computed tomography (micro-CT) scans and 3D reconstructions to accurately interpret and increase the availability of morphological information. We then infer their taxonomic placement in a Bayesian phylogenetic analysis by combining morphological and molecular data of extant and fossil Darwin wasps and evaluate the impact and usefulness of the additional information from micro-CT scanning. The results show that although we gained significant morphological information from micro-CT scanning, especially concerning measurements and hidden dorsal and ventral structures, this did not impact subfamily-level placement for any of the four fossils. However, micro-CT scanning improved the precision of fossil placements at the genus level, which might be key in future dating and diversification analyses. Finally, we describe the four new fossil species as Rhyssa gulliveri sp. nov. in Rhyssinae, Triclistus levii sp. nov. in Metopiinae, Firkantus freddykruegeri gen. et. sp. nov. in Pimplinae and Magnocula sarcophaga gen. et sp. nov. in Phygadeuontinae. The first two species are the first known representatives of the subfamilies Rhyssinae and Metopiinae in amber.

Supplementary information: The online version contains supplementary material available at 10.1186/s13358-023-00294-2.

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显微CT扫描增加的形态学信息对达尔文黄蜂(膜翅目,伊蚊科)在琥珀中的系统发育位置的影响。
化石的正确解释及其可靠的分类位置是理解生物多样性进化史的基础。琥珀包裹体通常比压缩化石保存更多的形态信息,但通常是部分隐藏或扭曲的,这可能会阻碍分类学鉴定。在这里,我们研究了波罗的海和多米尼加琥珀中的四种新的达尔文黄蜂化石,使用微型计算机断层扫描(micro-CT)扫描和3D重建来准确解释和增加形态信息的可用性。然后,我们通过结合现存和化石达尔文黄蜂的形态和分子数据,在贝叶斯系统发育分析中推断出它们的分类位置,并评估来自显微CT扫描的额外信息的影响和有用性。结果表明,尽管我们从显微CT扫描中获得了重要的形态学信息,特别是关于测量和隐藏的背侧和腹侧结构的信息,但这并没有影响四个化石中任何一个的亚科水平放置。然而,显微CT扫描提高了属级化石放置的精度,这可能是未来年代测定和多样化分析的关键。最后,我们描述了四个新的化石物种,即Rhyssinae的Rhyssa guliveri sp.nov.、Metopinae的Trilistus levi sp.nov..、Pimplinae的Firkantus freddykruegeri gen.et.s.nov.和Phygadeuontinae的Magnocula石棺gen.et sp.novs。前两个物种是已知的琥珀中Rhyssinae和Metopinae亚科的第一个代表。补充信息:在线版本包含补充材料,可访问10.1186/s13358-023-00294-2。
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来源期刊
Swiss Journal of Palaeontology
Swiss Journal of Palaeontology Earth and Planetary Sciences-Paleontology
CiteScore
4.30
自引率
16.70%
发文量
17
审稿时长
4 weeks
期刊介绍: The Swiss Journal of Palaeontology publishes original research and review articles of interest to the international community in the fields of palaeontology, taxonomy and systematics, while recognising at the same time the importance of documenting high-quality palaeontological data in a regional context. Palaeobiology in combination with alpha taxonomy is a core topic of the journal. Submitted papers should have an appeal as wide as possible, directed towards an international readership. Contributions should not have been simultaneously submitted elsewhere, and the overlap of content between related articles should be minimal. Duplications of text and the use of previously published illustrations without adequate citation are unacceptable. If a manuscript has two or more authors, both or all have to sign to confirm they all were involved in the work and have agreed to its submission. The preferred manuscript language is UK English, but consistently used US English is also acceptable. We encourage the publication of proceedings of international meetings as well as special thematic issues. Short contributions and book reviews are also accepted. An international editorial team as well as guest editors guarantee that the thematic issues as well as all articles in regular issues are peer-reviewed and meet the highest standards.
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