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dc.contributor.authorMorris, JL
dc.contributor.authorPuttick, MN
dc.contributor.authorClark, JW
dc.contributor.authorEdwards, D
dc.contributor.authorKenrick, P
dc.contributor.authorPressel, S
dc.contributor.authorWellman, CH
dc.contributor.authorYang, Z
dc.contributor.authorSchneider, Harald
dc.contributor.authorDonoghue, PCJ
dc.identifier.citationMorris, J.L., Puttick, M.N., Clark, J.W., Edwards, D., Kenrick, P., Pressel, S., Wellman, C.H., Yang, Z., Schneider, H., Donoghue, P.C.J. (2018). The timescale of early land plant evolution. Proceedings of the National Academy of Sciences Mar 2018, 115 (10) E2274-E2283; DOI: 10.1073/pnas.1719588115en_US
dc.descriptionORCiD: 0000-0002-3626-5460en_US
dc.description.abstractEstablishing the timescale of early land plant evolution is essential for testing hypotheses on the coevolution of land plants and Earth’s System. The sparseness of early land plant megafossils and stratigraphic controls on their distribution make the fossil record an unreliable guide, leaving only the molecular clock. However, the application of molecular clock methodology is challenged by the current impasse in attempts to resolve the evolutionary relationships among the living bryophytes and tracheophytes. Here, we establish a timescale for early land plant evolution that integrates over topological uncertainty by exploring the impact of competing hypotheses on bryophyte−tracheophyte relationships, among other variables, on divergence time estimation. We codify 37 fossil calibrations for Viridiplantae following best practice. We apply these calibrations in a Bayesian relaxed molecular clock analysis of a phylogenomic dataset encompassing the diversity of Embryophyta and their relatives within Viridiplantae. Topology and dataset sizes have little impact on age estimates, with greater differences among alternative clock models and calibration strategies. For all analyses, a Cambrian origin of Embryophyta is recovered with highest probability. The estimated ages for crown tracheophytes range from Late Ordovician to late Silurian. This timescale implies an early establishment of terrestrial ecosystems by land plants that is in close accord with recent estimates for the origin of terrestrial animal lineages. Biogeochemical models that are constrained by the fossil record of early land plants, or attempt to explain their impact, must consider the implications of a much earlier, middle Cambrian–Early Ordovician, origin.en_US
dc.publisherNational Academy of Sciences of the United States of Americaen_US
dc.titleThe timescale of early land plant evolutionen_US
dc.typeJournal Articleen_US
dc.identifier.journalProceedings of the National Academy of Sciencesen_US
dc.identifier.startpageE2274 - E2283en_US
dc.internal.reviewer-noteopen access please approve asap ACH 10.5.18en
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences/Invertebrates and Plants Palaeobiology
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research/LS Research
pubs.organisational-group/Natural History Museum/Science Group/Initiatives
pubs.organisational-group/Natural History Museum/Science Group/Initiatives/Origins and Evolution
pubs.organisational-group/Natural History Museum/Science Group/Life Sciences
dc.embargoNot knownen_US
elements.import.authorMorris, JLen_US
elements.import.authorPuttick, MNen_US
elements.import.authorClark, JWen_US
elements.import.authorEdwards, Den_US
elements.import.authorKenrick, Pen_US
elements.import.authorPressel, Sen_US
elements.import.authorWellman, CHen_US
elements.import.authorYang, Zen_US
elements.import.authorSchneider, Hen_US
elements.import.authorDonoghue, PCJen_US
dc.description.nhmCopyright © 2018 the Author(s). This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND). The attached file is the published version of the article.en_US

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