Microstructural and crystallographic evolution of palaeognath (Aves) eggshells
The avian palaeognath phylogeny has been recently revised significantly due to the advancement of genome-wide comparative analyses and provides the opportunity to trace the evolution of the microstructure and crystallography of modern dinosaur eggshells. Here, eggshells of all major clades of Palaeo...
| Main Authors: | , , , , , |
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eLife Sciences Publications Ltd
2023-01-01
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| Series: | eLife |
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| Online Access: | https://elifesciences.org/articles/81092 |
| _version_ | 1797938398297587712 |
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| author | Seung Choi Mark E Hauber Lucas J Legendre Noe-Heon Kim Yuong-Nam Lee David J Varricchio |
| author_facet | Seung Choi Mark E Hauber Lucas J Legendre Noe-Heon Kim Yuong-Nam Lee David J Varricchio |
| author_sort | Seung Choi |
| collection | DOAJ |
| description | The avian palaeognath phylogeny has been recently revised significantly due to the advancement of genome-wide comparative analyses and provides the opportunity to trace the evolution of the microstructure and crystallography of modern dinosaur eggshells. Here, eggshells of all major clades of Palaeognathae (including extinct taxa) and selected eggshells of Neognathae and non-avian dinosaurs are analysed with electron backscatter diffraction. Our results show the detailed microstructures and crystallographies of (previously) loosely categorized ostrich-, rhea-, and tinamou-style morphotypes of palaeognath eggshells. All rhea-style eggshell appears homologous, while respective ostrich-style and tinamou-style morphotypes are best interpreted as homoplastic morphologies (independently acquired). Ancestral state reconstruction and parsimony analysis additionally show that rhea-style eggshell represents the ancestral state of palaeognath eggshells both in microstructure and crystallography. The ornithological and palaeontological implications of the current study are not only helpful for the understanding of evolution of modern and extinct dinosaur eggshells, but also aid other disciplines where palaeognath eggshells provide useful archive for comparative contrasts (e.g. palaeoenvironmental reconstructions, geochronology, and zooarchaeology). |
| first_indexed | 2024-04-10T18:59:15Z |
| format | Article |
| id | doaj.art-7dea13d31c8f4787875c7d2c0c1d6ff7 |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-10T18:59:15Z |
| publishDate | 2023-01-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
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| spelling | doaj.art-7dea13d31c8f4787875c7d2c0c1d6ff72023-01-31T12:31:12ZengeLife Sciences Publications LtdeLife2050-084X2023-01-011210.7554/eLife.81092Microstructural and crystallographic evolution of palaeognath (Aves) eggshellsSeung Choi0https://orcid.org/0000-0002-9013-2909Mark E Hauber1https://orcid.org/0000-0003-2014-4928Lucas J Legendre2https://orcid.org/0000-0003-1343-8725Noe-Heon Kim3Yuong-Nam Lee4David J Varricchio5Department of Earth Sciences, Montana State University, Bozeman, United States; Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, ChinaDepartment of Evolution, Ecology, and Behavior, School of Integrative Biology, University of Illinois Urbana-Champaign, Urbana, United StatesDepartment of Geological Sciences, University of Texas at Austin, Austin, United StatesSchool of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of Korea; Department of Geosciences, Princeton University, Princeton, United StatesSchool of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of KoreaDepartment of Earth Sciences, Montana State University, Bozeman, United StatesThe avian palaeognath phylogeny has been recently revised significantly due to the advancement of genome-wide comparative analyses and provides the opportunity to trace the evolution of the microstructure and crystallography of modern dinosaur eggshells. Here, eggshells of all major clades of Palaeognathae (including extinct taxa) and selected eggshells of Neognathae and non-avian dinosaurs are analysed with electron backscatter diffraction. Our results show the detailed microstructures and crystallographies of (previously) loosely categorized ostrich-, rhea-, and tinamou-style morphotypes of palaeognath eggshells. All rhea-style eggshell appears homologous, while respective ostrich-style and tinamou-style morphotypes are best interpreted as homoplastic morphologies (independently acquired). Ancestral state reconstruction and parsimony analysis additionally show that rhea-style eggshell represents the ancestral state of palaeognath eggshells both in microstructure and crystallography. The ornithological and palaeontological implications of the current study are not only helpful for the understanding of evolution of modern and extinct dinosaur eggshells, but also aid other disciplines where palaeognath eggshells provide useful archive for comparative contrasts (e.g. palaeoenvironmental reconstructions, geochronology, and zooarchaeology).https://elifesciences.org/articles/81092palaeognathaedinosauriaEBSDeggshellhomologyhomoplasy |
| spellingShingle | Seung Choi Mark E Hauber Lucas J Legendre Noe-Heon Kim Yuong-Nam Lee David J Varricchio Microstructural and crystallographic evolution of palaeognath (Aves) eggshells eLife palaeognathae dinosauria EBSD eggshell homology homoplasy |
| title | Microstructural and crystallographic evolution of palaeognath (Aves) eggshells |
| title_full | Microstructural and crystallographic evolution of palaeognath (Aves) eggshells |
| title_fullStr | Microstructural and crystallographic evolution of palaeognath (Aves) eggshells |
| title_full_unstemmed | Microstructural and crystallographic evolution of palaeognath (Aves) eggshells |
| title_short | Microstructural and crystallographic evolution of palaeognath (Aves) eggshells |
| title_sort | microstructural and crystallographic evolution of palaeognath aves eggshells |
| topic | palaeognathae dinosauria EBSD eggshell homology homoplasy |
| url | https://elifesciences.org/articles/81092 |
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