Multiple evolutionary origins and losses of tooth complexity in squamates - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2021

Multiple evolutionary origins and losses of tooth complexity in squamates

Résumé

Teeth act as tools for acquiring and processing food, thus holding a prominent role in vertebrate evolution. In mammals, dental-dietary adaptations rely on tooth complexity variations controlled by cusp number and pattern. Complexity increase through cusp addition has dominated the diversification of mammals. However, studies of Mammalia alone cannot reveal patterns of tooth complexity conserved throughout vertebrate evolution. Here, we use morphometric and phylogenetic comparative methods across fossil and extant squamates to show they also repeatedly evolved increasingly complex teeth, but with more flexibility than mammals. Since the Late Jurassic, multiple-cusped teeth evolved over 20 times independently from a single-cusped common ancestor. Squamates frequently lost cusps and evolved varied multiple-cusped morphologies at heterogeneous rates. Tooth complexity evolved in correlation with changes in plant consumption, resulting in several major increases in speciation. Complex teeth played a critical role in vertebrate evolution outside Mammalia, with squamates exemplifying a more labile system of dental-dietary evolution.
Fichier principal
Vignette du fichier
4-lafuma et al. 2021.pdf (2.84 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03395195 , version 1 (29-11-2021)

Identifiants

Citer

Fabien Lafuma, Ian J Corfe, Julien Clavel, Nicolas Di-Poï. Multiple evolutionary origins and losses of tooth complexity in squamates. Nature Communications, 2021, 12 (6001), ⟨10.1038/s41467-021-26285-w⟩. ⟨hal-03395195⟩
35 Consultations
35 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More