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Endocranial development in non-avian dinosaurs reveals an ontogenetic brain trajectory distinct from extant archosaurs.
King, Logan; Zhao, Qi; Dufeau, David L; Kawabe, Soichiro; Witmer, Lawrence; Zhou, Chang-Fu; Rayfield, Emily J; Benton, Michael J; Watanabe, Akinobu.
Afiliación
  • King L; Institute of Vertebrate Paleontology & Paleoanthropology, Chinese Academy of Sciences, Beijing, China. logan.king@bristol.ac.uk.
  • Zhao Q; School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol, UK. logan.king@bristol.ac.uk.
  • Dufeau DL; Institute of Vertebrate Paleontology & Paleoanthropology, Chinese Academy of Sciences, Beijing, China.
  • Kawabe S; Department of Anatomy and Pathology, Marian University College of Osteopathic Medicine, Indianapolis, IN, USA.
  • Witmer L; Institute of Dinosaur Research, Fukui Prefectural University, Eiheiji, Fukui, Japan.
  • Zhou CF; Fukui Prefectural Dinosaur Museum, Katsuyama, Fukui, Japan.
  • Rayfield EJ; Department of Biomedical Sciences, Ohio University Heritage College of Osteopathic Medicine, Athens, OH, USA.
  • Benton MJ; Ohio Center for Ecology and Evolutionary Studies, Ohio University, Athens, OH, USA.
  • Watanabe A; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China.
Nat Commun ; 15(1): 7415, 2024 Aug 28.
Article en En | MEDLINE | ID: mdl-39198439
ABSTRACT
Modern birds possess highly encephalized brains that evolved from non-avian dinosaurs. Evolutionary shifts in developmental timing, namely juvenilization of adult phenotypes, have been proposed as a driver of head evolution along the dinosaur-bird transition, including brain morphology. Testing this hypothesis requires a sufficient developmental sampling of brain morphology in non-avian dinosaurs. In this study, we harness brain endocasts of a postnatal growth series of the ornithischian dinosaur Psittacosaurus and several other immature and mature non-avian dinosaurs to investigate how evolutionary changes to brain development are implicated in the origin of the avian brain. Using three-dimensional characterization of neuroanatomical shape across archosaurian reptiles, we demonstrate that (i) the brain of non-avian dinosaurs underwent a distinct developmental trajectory compared to alligators and crown birds; (ii) ornithischian and non-avialan theropod dinosaurs shared a similar developmental trajectory, suggesting that their derived trajectory evolved in their common ancestor; and (iii) the evolutionary shift in developmental trajectories is partly consistent with paedomorphosis underlying overall brain shape evolution along the dinosaur-bird transition; however, the heterochronic signal is not uniform across time and neuroanatomical region suggesting a highly mosaic acquisition of the avian brain form.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cráneo / Aves / Encéfalo / Dinosaurios / Evolución Biológica / Fósiles Límite: Animals Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cráneo / Aves / Encéfalo / Dinosaurios / Evolución Biológica / Fósiles Límite: Animals Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido