Cranial biomechanics in basal urodeles: the Siberian salamander (Salamandrella keyserlingii) and its evolutionary and developmental implications
Zhou, Zupeng (Guilin University of Electronic Technology. School of Mechanical and Electrical Engineering)
Fortuny, Josep (Institut Català de Paleontologia Miquel Crusafont)
Marcé Nogué, Jordi (University of Hamburg. Centrum für Naturkunde)
Skutschas, Pavel P. (Saint Petersburg State University. Department of Vertebrate Zoology)

Data:	2017
Resum:	Developmental changes in salamander skulls, before and after metamorphosis, afect the feeding capabilities of these animals. How changes in cranial morphology and tissue properties afect the function of the skull are key to decipher the early evolutionary history of the crown-group of salamanders. Here, 3D cranial biomechanics of the adult Salamandrella keyserlingii were analyzed under diferent tissue properties and ossifcation sequences of the cranial skeleton. This helped unravel that: (a) Mechanical properties of tissues (as bone, cartilage or connective tissue) imply a consensus between the stifness required to perform a function versus the fxation (and displacement) required with the surrounding skeletal elements. (b) Changes on the ossifcation pattern, producing fontanelles as a result of bone loss or failure to ossify, represent a trend toward simplifcation potentially helping to distribute stress through the skull, but may also imply a major destabilization of the skull. (c) Bone loss may be originated due to biomechanical optimization and potential reduction of developmental costs. (d) Hynobiids are excellent models for biomechanical reconstruction of extinct early urodeles.
Ajuts:	Ministerio de Economía y Competitividad CGL2014-54373-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/BP-A-00048
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Scientific reports, Vol. 7, (August 2017) , art. 10174, ISSN 2045-2322

DOI: 10.1038/s41598-017-10553-1
PMID: 28860600

11 p, 2.6 MB

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