Decoupled evolution of the cranium and mandible in carnivoran mammals.
Adaptive evolution
Ornstein-Uhlenbeck modeling
craniomandibular
geometric morphometrics
phylogenetic comparative methods
skull ecomorphology
Journal
Evolution; international journal of organic evolution
ISSN: 1558-5646
Titre abrégé: Evolution
Pays: United States
ID NLM: 0373224
Informations de publication
Date de publication:
12 2022
12 2022
Historique:
revised:
06
06
2022
received:
22
04
2022
accepted:
17
06
2022
pubmed:
26
7
2022
medline:
20
12
2022
entrez:
25
7
2022
Statut:
ppublish
Résumé
The relationship between skull morphology and diet is a prime example of adaptive evolution. In mammals, the skull consists of the cranium and the mandible. Although the mandible is expected to evolve more directly in response to dietary changes, dietary regimes may have less influence on the cranium because additional sensory and brain-protection functions may impose constraints on its morphological evolution. Here, we tested this hypothesis by comparing the evolutionary patterns of cranium and mandible shape and size across 100+ species of carnivoran mammals with distinct feeding ecologies. Our results show decoupled modes of evolution in cranial and mandibular shape; cranial shape follows clade-based evolutionary shifts, whereas mandibular shape evolution is linked to broad dietary regimes. These results are consistent with previous hypotheses regarding hierarchical morphological evolution in carnivorans and greater evolutionary lability of the mandible with respect to diet. Furthermore, in hypercarnivores, the evolution of both cranial and mandibular size is associated with relative prey size. This demonstrates that dietary diversity can be loosely structured by craniomandibular size within some guilds. Our results suggest that mammal skull morphological evolution is shaped by mechanisms beyond dietary adaptation alone.
Banques de données
Dryad
['10.5061/dryad.ht76hdrjk']
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2959-2974Informations de copyright
© 2022 The Authors. Evolution © 2022 The Society for the Study of Evolution.
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