Autor según el artículo: Esteve J; Marcé-Nogué J; Pérez-Peris F; Rayfield E

Departamento: Enginyeria Mecànica

Autor/es de la URV: Marcé Nogué, Jordi

Palabras clave: Trilobite Substrate Record Predation Moulting Finite-element models Exuviation Evolution Early cambrian trilobites Biomechanics Arthropod

Resumen: Arthropods (i.e. insects, spiders, crustaceans, myriapods and others), are the most successful Phanerozoic animals. The group is characterized by the possession of a segmented body, jointed limbs and a hard cuticle that is episodically moulted. One highly successful but now extinct group of arthropods is the trilobites. Trilobites underwent episodic moulting (ecdysis), and most trilobites possess facial sutures, lines of weakness in the cephalon, via which the exuviae is shed and the animal emerges. However, zones of weakness appear to represent a structural trade-off or constraint, particularly during burrowing; sacrificing a consolidated head region useful in burrowing for the ability to moult. Here we reconcile this trade-off by using biomechanical modelling to demonstrate that facial sutures exist in regions of low stress during the application of burrowing loads. Furthermore, facial sutures and the structure of the cephalon enable sutured trilobites to withstand greater stresses than their non-suture counterparts. We suggest that this ability to withstand greater burrowing loads enabled trilobites to successfully invade bioturbated and more consolidated sediments of the Cambrian Sediment Revolution, thus facilitating their diversification in the Cambrian and Ordovician and contributing to the evolutionary success of this iconic arthropod group.

Áreas temáticas: Planejamento urbano e regional / demografia Paleontology Materiais Geociências Ecology, evolution, behavior and systematics Ciências biológicas i Ciências ambientais Biodiversidade Astronomia / física

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

Direcció de correo del autor: jordi.marce@urv.cat

Identificador del autor: 0000-0001-9852-7027

Fecha de alta del registro: 2021-10-10

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/full/10.1111/pala.12541

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Palaeontology. 64 (4): 519-530

Referencia de l'ítem segons les normes APA: Esteve J; Marcé-Nogué J; Pérez-Peris F; Rayfield E (2021). Cephalic biomechanics underpins the evolutionary success of trilobites. Palaeontology, 64(4), 519-530. DOI: 10.1111/pala.12541

DOI del artículo: 10.1111/pala.12541

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2021

Tipo de publicación: Journal Publications