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Group mating in Cretaceous water striders.
Fu, Yanzhe; Cai, Chenyang; Chen, Pingping; Xuan, Qiang; Myint, Tin Aung; Huang, Diying.
Afiliación
  • Fu Y; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.
  • Cai C; Department of Biology II, Ludwig-Maximilians-Universität München, Biocenter, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany.
  • Chen P; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.
  • Xuan Q; Section Entomology, Naturalis Biodiversity Centre, 2300 RA Leiden, The Netherlands.
  • Myint TA; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.
  • Huang D; Department of Geology, University of Mandalay, Mandalay, Myanmar.
Proc Biol Sci ; 291(2020): 20232546, 2024 Apr 10.
Article en En | MEDLINE | ID: mdl-38565153
ABSTRACT
Fossilized mating insects are irreplaceable material for comprehending the evolution of the mating behaviours and life-history traits in the deep-time record of insects as well as the potential sexual conflict. However, cases of mating pairs are particularly rare in fossil insects, especially aquatic or semi-aquatic species. Here, we report the first fossil record of a group of water striders in copulation (including three pairs and a single adult male) based on fossils from the mid-Cretaceous of northern Myanmar. The new taxon, Burmogerris gen. nov., likely represents one of the oldest cases of insects related to the marine environment, such as billabongs formed by the tides. It exhibits conspicuous dimorphism associated with sexual conflict the male is equipped with a specialized protibial comb as a grasping apparatus, likely representing an adaptation to overcome female resistance during struggles. The paired Burmogerris show smaller males riding on the backs of the females, seemingly recording a scene of copulatory struggles between the sexes. Our discovery reveals a mating system dominated by males and sheds light on the potential sexual conflicts of Burmogerris in the Cretaceous. It indicates the mating behaviour remained stable over long-term geological time in these water-walking insects.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ámbar / Rasgos de la Historia de Vida Límite: Animals País/Región como asunto: Asia Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ámbar / Rasgos de la Historia de Vida Límite: Animals País/Región como asunto: Asia Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido