Temporal framework for the Yanliao Biota and timing of the origin of crown mammals

Establishing the temporal sequence of the Middle-Late Jurassic Yanliao Biota is essential as it anchors the timing of many key evolutionary innovations in vertebrates. Lack of sufficiently reliable high-precision ages of fossil-bearing horizons hinders our ability to reconstruct the tempo and mode o...

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Bibliographic Details
Published in:Earth and planetary science letters 2023-09, Vol.617, p.118246, Article 118246
Main Authors: Yu, Zhiqiang, Wang, Haibing, Zhang, Chi, Dong, Liping, Huyskens, Magdalena H., Cui, Zexian, Cary, Paige, Di, Yankun, Amelin, Yuri, Li, Gang, Li, Qiuli, Xia, Xiao-Ping, Deng, Chenglong, Wang, Yuanqing, He, Huaiyu, Yin, Qing-Zhu
Format: Article
Language:English
Subjects:
Bayesian tip-dating analysis
evolution
Jurassic
Mammalia
U-Pb geochronology
Yanliao Biota
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Summary:Establishing the temporal sequence of the Middle-Late Jurassic Yanliao Biota is essential as it anchors the timing of many key evolutionary innovations in vertebrates. Lack of sufficiently reliable high-precision ages of fossil-bearing horizons hinders our ability to reconstruct the tempo and mode of vertebrate evolution. Here, we frame a temporal sequence of Yanliao Biota with precise age constraints for iconic vertebrates, proposing that the major vertebrate-bearing strata span from 164 Ma to 157 Ma in age. The increasing ecological diversity of mammaliaforms is well illustrated by the Middle-Late Jurassic Yanliao Biota and Early Cretaceous Jehol Biota. Incorporation of the updated temporal frameworks in Bayesian tip-dated mammaliaform phylogeny reveals that Triassic haramiyidans are separate from Jurassic taxa and unrelated to crown Mammalia. Tip-dated phylogeny supports a long-fuse model for mammal evolution, featured by a Late Triassic root and Middle-Late Jurassic interordinal diversification of crown Mammalia, showing consistency with molecular-based timetrees in divergence timing. •New geochronology for the Jurassic Yanliao Biota animal-rich outcrops.•Age constraints on the oldest salamanders and their early diversification.•Temporal constraints on membrane-winged dinosaurs.•Reconstruction of tip-dated mammaliaform phylogeny by incorporating fossil ages.•Tip-dated phylogeny favors the long-fuse model for the evolution of Mammalia.
ISSN:0012-821X
1385-013X
DOI:10.1016/j.epsl.2023.118246