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. 2018 Apr 16;9:1499. doi: 10.1038/s41467-018-03996-1

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Stratigraphy in the Italian Dolomites, and dating the dinosaur diversification event. Footprint occurrences within the chrono-stratigraphic framework of the middle and upper Triassic of the Dolomites (Southern Alps, NE Italy), and the derived abundances of dinosaurian, non-dinosaurian dinosauromorph and crurotarsan trackmakers within the associations A1, A2, and A3 described in the text. Note the correlation between the change in composition of the associations and the climate shifts (climate trend and zones after ref. ¹¹). Lithostratigraphic abbreviations: ADZ: Zoppè Sandstone; AQT: Acquatona Formation; BHL: Livinallongo/Buchenstein Formation; BIV: Bivera Formation; CTR: Contrin Formation; DCS: Cassian Dolomite; DON: Dont Formation; DPR: Dolomia Principale; FCL: Coll’Alto dark Limestones; GLS: Gracilis Formation; HKS: Heiligkreuz Formation; IMF: Fernazza Formation and volcanites; MBT: Ambata Formation; MNA: Moena Formation; MRB/RIC: Richthofen Conglomerate and Morbiac dark Limestone; NTR: Monte Rite Formation; PPS: Piz da Peres Conglomerate; REC: Recoaro Limestone; SCI: Sciliar Formation; SCS: San Cassiano Formation; SLI: Lower Serla Dolomite; SLS Upper Serla Formation; TVZ: Travenanzes Formation; VTG: Voltago Conglomerate; WEN: Wengen Formation. Lithologies: a cherty limestone; b sandstone; c sandy limestone; d volcanics; e oolitic-bioclastic limestone; f black platy limestone or dolostone, black shale; g dolostone; h marlstone, claystone and shale; i marly limestone; j conglomerate. Ages from GTS timescale, modified after refs^{12, 91, 92}. The silhouette images were created by the authors for use in this paper