EdenteV1, Main, Exploration, bibRecordById, PMC:3870693

Edentulism, beaks, and biomechanical innovations in the evolution of theropod dinosaurs

Identifieur interne : 001176 ( Main/Exploration ); précédent : 001175; suivant : 001177

Edentulism, beaks, and biomechanical innovations in the evolution of theropod dinosaurs

Auteurs : Stephan Lautenschlager [Royaume-Uni] ; Lawrence M. Witmer ; Perle Altangerel [Mongolie] ; Emily J. Rayfield [Royaume-Uni]

Source :

Proceedings of the National Academy of Sciences of the United States of America [ 0027-8424 ] ; 2013.

RBID : PMC:3870693

Descripteurs français

KwdFr :
- Animaux, Bec (anatomie et histologie), Bec (physiologie), Comportement alimentaire (physiologie), Dinosaures (anatomie et histologie), Dinosaures (physiologie), Phénomènes biomécaniques (physiologie), Vol animal (physiologie), Évolution biologique.
MESH :
- anatomie et histologie : Bec, Dinosaures.
- physiologie : Bec, Comportement alimentaire, Dinosaures, Phénomènes biomécaniques, Vol animal.
- Animaux, Évolution biologique.

English descriptors

KwdEn :
- Animals, Beak (anatomy & histology), Beak (physiology), Biological Evolution, Biomechanical Phenomena (physiology), Dinosaurs (anatomy & histology), Dinosaurs (physiology), Feeding Behavior (physiology), Flight, Animal (physiology).
MESH :
- anatomy & histology : Beak, Dinosaurs.
- physiology : Beak, Biomechanical Phenomena, Dinosaurs, Feeding Behavior, Flight, Animal.
- Animals, Biological Evolution.

Abstract

Significance

Edentulism and beaks (rhamphothecae) are distinguishing features among extant birds and are traditionally regarded as a response to weight-saving demands for the evolution of flight. However, keratin-covered beaks paralleled by edentulism appeared in non-avian theropod dinosaurs and as early as the Early Cretaceous. Here, high-resolution, digital biomechanical models of the skull of the Cretaceous therizinosaur Erlikosaurus andrewsi are used to investigate the functional significance of these morphological specialisations and adaptations occurring in non-avian, maniraptoriform dinosaurs. Results of finite-element analyses provide evidence that keratinous beaks play an important role in enhancing cranial stability by mitigation stress and strain during feeding and represent an evolutionary innovation developed early in derived theropod dinosaurs.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3870693

DOI: 10.1073/pnas.1310711110
PubMed: 24297877
PubMed Central: 3870693

Affiliations:

Mongolie, Royaume-Uni

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Serveur d'exploration sur le patient édenté (maquette)

Edentulism, beaks, and biomechanical innovations in the evolution of theropod dinosaurs

Edentulism, beaks, and biomechanical innovations in the evolution of theropod dinosaurs

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration sur le patient édenté (maquette)
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