Attenuated evolution of mammals through the Cenozoic - Archive ouverte HAL Access content directly
Journal Articles Science Year : 2022

Attenuated evolution of mammals through the Cenozoic

Abstract

The Cenozoic diversification of placental mammals is the archetypal adaptive radiation. Yet, discrepancies between molecular divergence estimates and the fossil record fuel ongoing debate around the timing, tempo, and drivers of this radiation. Analysis of a three-dimensional skull dataset for living and extinct placental mammals demonstrates that evolutionary rates peak early and attenuate quickly. This long-term decline in tempo is punctuated by bursts of innovation that decreased in amplitude over the past 66 million years. Social, precocial, aquatic, and herbivorous species evolve fastest, especially whales, elephants, sirenians, and extinct ungulates. Slow rates in rodents and bats indicate dissociation of taxonomic and morphological diversification. Frustratingly, highly similar ancestral shape estimates for placental mammal superorders suggest that their earliest representatives may continue to elude unequivocal identification.
Fichier principal
Vignette du fichier
Goswami et al. 2022_manuscript. Attenuated.pdf (3.39 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03839671 , version 1 (28-11-2023)

Identifiers

Cite

Anjali Goswami, Eve Noirault, Ellen Coombs, Julien Clavel, Anne-Claire Fabre, et al.. Attenuated evolution of mammals through the Cenozoic. Science, 2022, 378 (6618), pp.377-383. ⟨10.1126/science.abm7525⟩. ⟨hal-03839671⟩
38 View
4 Download

Altmetric

Share

Gmail Facebook X LinkedIn More