Contrasting macroevolutionary patterns in pelagic tetrapods across the Triassic-Jurassic transition.

Autor:	Laboury A; Evolution & Diversity Dynamics Lab, University of Liège, Liège, Belgium., Stubbs TL; School of Life, Health & Chemical Sciences, Open University, Milton Keynes, United Kingdom., Wolniewicz AS; Department of Earth Sciences, University of Cambridge, Cambridge, United Kingdom.; School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China.; Institute of Paleobiology, Polish Academy of Sciences, Warsaw, Poland., Liu J; School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China., Scheyer TM; Department of Palaeontology, University of Zurich, Zürich, Switzerland., Jones MEH; Natural History Museum, Cromwell Road, London, United Kingdom., Fischer V; Evolution & Diversity Dynamics Lab, University of Liège, Liège, Belgium.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2024 Sep 16. Date of Electronic Publication: 2024 Sep 16.
DOI:	10.1093/evolut/qpae138
Abstrakt:	The iconic marine raptorial predators Ichthyosauria and Eosauropterygia co-existed in the same ecosystems throughout most of the Mesozoic Era, facing similar evolutionary pressures and environmental perturbations. Both groups seemingly went through a massive macroevolutionary bottleneck across the Triassic-Jurassic (T/J) transition that greatly reduced their morphological diversity, leaving pelagic lineages as the only survivors. However, analyses of marine reptile disparity across the T/J transition have usually employed coarse morphological and temporal data. We comprehensively compare the evolution of ichthyosaurian and eosauropterygian morphology and body size across the Middle Triassic to Early Jurassic interval and find contrasting macroevolutionary patterns. The ecomorphospace of eosauropterygians predominantly reflects a strong phylogenetic signal, resulting in the clustering of three clades with clearly distinct craniodental phenotypes, suggesting 'leaps' towards novel feeding ecologies. Ichthyosaurian diversification lacks a discernible evolutionary trend, as we find evidence for a wide overlap of craniodental morphologies between Triassic and Early Jurassic forms. The temporal evolution of ecomorphological disparity, fin shape and body size of eosauropterygians and ichthyosaurians during the Late Triassic does not support the hypothesis of an abrupt macroevolutionary bottleneck near the T/J transition. Rather, an important turnover event should be sought earlier, during times of rapid sea level falls. (© The Author(s) 2024. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE). All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Databáze:	MEDLINE
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