Evolution and mandibular sexual dimorphism in mid‐Cretaceous scorpionflies (Insecta: Mecoptera: Meropeidae)

IF 3.7 1区生物学 Q1 Agricultural and Biological Sciences

Journal of Systematics and Evolution Pub Date : 2024-07-23 DOI:10.1111/jse.13121

Yanjie Zhang, Conrad C. Labandeira, Jiamiao Yu, Chungkun Shih, Dong Ren, Taiping Gao

{"title":"Evolution and mandibular sexual dimorphism in mid‐Cretaceous scorpionflies (Insecta: Mecoptera: Meropeidae)","authors":"Yanjie Zhang, Conrad C. Labandeira, Jiamiao Yu, Chungkun Shih, Dong Ren, Taiping Gao","doi":"10.1111/jse.13121","DOIUrl":null,"url":null,"abstract":"Based on several earwigfly specimens with well‐preserved mouthparts of Meropeidae from mid‐Cretaceous Burmese amber, a detailed, initial analysis was conducted of the structure of Mesozoic meropeids. Compared to the singularly flattened mandible of modern meropeids, the new specimens reveal that Mesozoic representatives had two distinct types of mandibles: blade‐shaped and scoop‐shaped. Current fossil evidence indicates that during the Mesozoic Era, Meropeidae displayed sexual dimorphism that was reflected in the structure of their mandibles. This structural difference may indicate that about 99 million years ago, meropeids had a more complex diet than extant confamilial taxa. Phylogenetic results suggest that Torvimerope gen. nov., along with Burmomerope, two extinct genera, form a clade and that are the sister taxon to crown‐group Meropeidae. The new material offers new possibilities for inferring the feeding habits and mating behavior of early Meropeidae.","PeriodicalId":17087,"journal":{"name":"Journal of Systematics and Evolution","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Systematics and Evolution","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/jse.13121","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}

引用次数: 0

Abstract

Based on several earwigfly specimens with well‐preserved mouthparts of Meropeidae from mid‐Cretaceous Burmese amber, a detailed, initial analysis was conducted of the structure of Mesozoic meropeids. Compared to the singularly flattened mandible of modern meropeids, the new specimens reveal that Mesozoic representatives had two distinct types of mandibles: blade‐shaped and scoop‐shaped. Current fossil evidence indicates that during the Mesozoic Era, Meropeidae displayed sexual dimorphism that was reflected in the structure of their mandibles. This structural difference may indicate that about 99 million years ago, meropeids had a more complex diet than extant confamilial taxa. Phylogenetic results suggest that Torvimerope gen. nov., along with Burmomerope, two extinct genera, form a clade and that are the sister taxon to crown‐group Meropeidae. The new material offers new possibilities for inferring the feeding habits and mating behavior of early Meropeidae.

查看原文本刊更多论文

白垩纪中期蝎蝇（昆虫纲：甲壳目：蝎蝇科）的进化和下颌性二态性

根据缅甸白垩纪中期琥珀中几只口器保存完好的蠼螋标本，对中生代蠼螋的结构进行了详细的初步分析。与现代美利佩科动物单一扁平的下颌骨相比，新标本揭示了中生代美利佩科动物有两种不同类型的下颌骨：刀状和勺状。目前的化石证据表明，在中生代，美罗佩科动物的下颌骨结构反映了它们的性二型。这种结构上的差异可能表明，在距今约 9,900 万年前，美罗佩科的食性比现存的共生类群更为复杂。系统发育结果表明，Torvimerope gen.nov.与Burmomerope这两个已灭绝的属形成一个支系，是冠群美罗佩科的姊妹类群。新材料为推断早期鱼芒鱼科的摄食习性和交配行为提供了新的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Systematics and Evolution Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

7.40

自引率

8.10%

发文量

1368

审稿时长

6-12 weeks

期刊介绍： Journal of Systematics and Evolution (JSE, since 2008; formerly Acta Phytotaxonomica Sinica) is a plant-based international journal newly dedicated to the description and understanding of the biological diversity. It covers: description of new taxa, monographic revision, phylogenetics, molecular evolution and genome evolution, evolutionary developmental biology, evolutionary ecology, population biology, conservation biology, biogeography, paleobiology, evolutionary theories, and related subjects.