An early trend towards gigantism in Triassic sauropodomorph dinosaurs

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usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div> </div> <div class="action-panel-control-wrap existing-collections-controls"> <label for="collections-action-panel-add-to-existing" class="action-panel-label"> Choose a collection: </label> <select id="collections-action-panel-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="save_share" data-ga-action="select_collection" data-ga-label="($('#collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"> </select> <div class="collections-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your collection due to an error<br> <a href="#">Please try again</a> </div> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore data-ga-category="save_share" data-ga-action="collections" data-ga-label="add"> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to Collections' panel" ref="linksrc=close_collections_panel" aria-controls="collections-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="collections" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="bibliography-action-panel" class="bibliography-action-panel action-panel in-progress-dots-panel" aria-hidden="true" data-bibliography-open-panel-enabled="false" data-bibliography-open-panel-url-hash="#open-bibliography-panel"> <div class="inner-wrap"> <h3 class="action-panel-heading"> Add to My Bibliography </h3> <form id="bibliography-action-panel-form" class="bibliography-action-panel-form action-panel-content action-form action-panel-smaller-selectors" data-add-to-bibliography-max-amount="100" data-add-to-bibliography-batch-size="10" data-bibliography-delegates-url="/list-bibliography-delegates/" data-add-to-bibliography-url="/add-to-bibliography/" data-get-article-ids-by-search-url="/get-article-ids-by-search/" data-mybib-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/mybibliography/"> <input type="hidden" name="csrfmiddlewaretoken" value="BWk17aH71QYjkwVit9EtcoyOQS4TDd7Yx4eFUQa1oX1M2Dw9QaHP0g94wAwkzbSd"> <div class="action-panel-control-wrap bibliographies-controls"> <div class="choice-group"> <ul class="bibliographies-action-add radio-group-items"> <li> <input name="bibliography" id="my-bibliography" class="my-bibliography" type="radio" checked/> <label for="my-bibliography">My Bibliography</label> </li> </ul> </div> </div> <div class="bibliographies-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your delegates due to an error<br> <a href="#">Please try again</a> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to bibliography' panel" ref="linksrc=close_bibliography_panel" aria-controls="bibliography-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="mybib" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="saved-search-action-panel" class="saved-search-action-panel action-panel " aria-hidden="true" data-saved-search-open-panel-enabled="false" data-saved-search-open-panel-url-hash="#open-saved-search-panel"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your saved search </h2> <form id="saved-search-action-panel-form" class="saved-search-action-panel-form action-panel-content action-form" data-create-saved-search-url="/create-saved-search/" data-try-search-terms-url="/try-search-term/" data-saved-search-root-url="https://www.ncbi.nlm.nih.gov/myncbi/searches/"> <input type="hidden" name="csrfmiddlewaretoken" value="BWk17aH71QYjkwVit9EtcoyOQS4TDd7Yx4eFUQa1oX1M2Dw9QaHP0g94wAwkzbSd"> <div class="action-panel-control-wrap"> <label for="saved-search-name" class="action-panel-label saved-search-name-label required-field-asterisk"> Name of saved search: </label> <input maxlength="200" type="text" name="saved-search-name" id="saved-search-name" class="saved-search-name" value="" required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="action-panel-control-wrap"> <label for="saved-search-term" class="action-panel-label required-field-asterisk"> Search terms: </label> <textarea name="saved-search-term" id="saved-search-term" class="saved-search-term" required></textarea> </div> <div class="test-search-term-wrap"> <a href="#" class="try-search-term">Test search terms</a> </div> <div class="choice-group action-panel-extra-margin-top"> <span class="action-panel-label" id="fieldset-label"> Would you like email updates of new search results? </span> <fieldset id="saved-search-alert" aria-describedby="fieldset-label"> <legend class="usa-sr-only">Saved Search Alert Radio Buttons</legend> <ul class="radio-group-items"> <li> <input type="radio" id="saved-search-alert-yes" class="saved-search-alert-yes" name="saved-search-alert" value="yes" checked> <label for="saved-search-alert-yes" class="action-panel-label">Yes</label> </li> <li> <input aria-label="No radio input" type="radio" id="saved-search-alert-no" class="saved-search-alert-no" name="saved-search-alert" value="no"> <label for="saved-search-alert-no" class="action-panel-label">No</label> </li> </ul> </fieldset> </div> <div class="alert-schedule-wrap"> <div class="action-panel-control-wrap"> <label class="action-panel-label"> Email: </label> <span aria-label="Email address" id="saved-search-email" class="action-panel-label"><span class="action-panel-label-bold"></span> (<a class="myncbi-account-settings" href="https://www.ncbi.nlm.nih.gov/account/settings/">change</a>)</span> </div> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="saved-search-frequency" class="action-panel-label"> Frequency: </label> <select id="saved-search-frequency" class="no-border-panel-selector saved-search-frequency"> <option value="monthly">Monthly</option> <option value="weekly">Weekly</option> <option value="daily">Daily</option> </select> </div> <div class="action-panel-control-wrap saved-search-monthly-additional"> <label for="saved-search-monthly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-monthly-on-day" class="no-border-panel-selector"> <option value="Sunday">The first Sunday</option> <option value="Monday">The first Monday</option> <option value="Tuesday">The first Tuesday</option> <option value="Wednesday">The first Wednesday</option> <option value="Thursday">The first Thursday</option> <option value="Friday">The first Friday</option> <option value="Saturday">The first Saturday</option> <option value="day">The first day</option> <option value="weekday">The first weekday</option> </select> </div> <div class="action-panel-control-wrap saved-search-weekly-additional"> <label for="saved-search-weekly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-weekly-on-day" class="no-border-panel-selector saved-search-weekly-on-day"> <option value="Sunday">Sunday</option> <option value="Monday">Monday</option> <option value="Tuesday">Tuesday</option> <option value="Wednesday">Wednesday</option> <option value="Thursday">Thursday</option> <option value="Friday">Friday</option> <option value="Saturday">Saturday</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-report" class="action-panel-label"> Report format: </label> <select id="saved-search-report" class="no-border-panel-selector saved-search-report"> <option value="DocSum">Summary</option> <option value="DocSumText">Summary (text)</option> <option value="Abstract">Abstract</option> <option value="AbstractText">Abstract (text)</option> <option value="MEDLINE">PubMed</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-amount" class="action-panel-label"> Send at most: </label> <select id="saved-search-amount" class="no-border-panel-selector saved-search-amount"> <option value="1">1 item</option> <option value="5" selected>5 items</option> <option value="10">10 items</option> <option value="20">20 items</option> <option value="50">50 items</option> <option value="100">100 items</option> <option value="200">200 items</option> </select> </div> <div> <input type="checkbox" id="saved-search-send-if-no-result" class="saved-search-send-if-no-result" name="saved-search-send-if-no-result"> <label for="saved-search-send-if-no-result" class="action-panel-label smaller-checkbox"> Send even when there aren't any new results </label> </div> <div class="action-panel-control-wrap option-text-in-email-wrap"> <label for="saved-search-email-text" class="action-panel-label"> Optional text in email: </label> <textarea name="saved-search-email-text" id="saved-search-email-text" class="saved-search-email-text"></textarea> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Saving..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Save </button> <button class="action-panel-cancel" aria-label="Close 'Your saved search' panel" ref="linksrc=close_saved_search_panel" aria-controls="saved-search-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="citation-manager-action-panel" class="citation-manager-action-panel action-panel" aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Create a file for external citation management software </h2> <form id="citation-manager-action-panel-form" class="action-panel-content action-form" action="/results-export-ids/" data-by-search-action="/results-export-search-data/" data-by-ids-action="/results-export-ids/" method="post" data-by-search-method="post" data-by-ids-method="post"> <input type="hidden" name="csrfmiddlewaretoken" value="BWk17aH71QYjkwVit9EtcoyOQS4TDd7Yx4eFUQa1oX1M2Dw9QaHP0g94wAwkzbSd"> <input name="results-format" type="hidden" value="pubmed"/> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Sending..." data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="save"> Create file </button> <button class="action-panel-cancel" aria-label="Close 'Send citations to citation manager' panel" ref="linksrc=close_citation_manager_panel" aria-controls="citation-manager-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="rss-action-panel" class="rss-action-panel action-panel " aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your RSS Feed </h2> <form id="rss-action-panel-form" class="rss-action-panel-form action-panel-content action-form" data-create-rss-feed-url="/create-rss-feed-url/" data-search-form-term-value=""> <input type="hidden" name="csrfmiddlewaretoken" value="BWk17aH71QYjkwVit9EtcoyOQS4TDd7Yx4eFUQa1oX1M2Dw9QaHP0g94wAwkzbSd"> <div class="action-panel-control-wrap"> <label for="rss-name" class="action-panel-label required-field-asterisk"> Name of RSS Feed: </label> <input maxlength="200" placeholder="Name" type="text" name="rss-name" id="rss-name" class="rss-name" value='' required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="rss-limit-wrap"> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="rss-limit" class="action-panel-label"> Number of items displayed: </label> <select id="rss-limit" class="no-border-panel-selector rss-limit"> <option value="5">5</option> <option value="10">10</option> <option value="15" selected="selected">15</option> <option value="20">20</option> <option value="50">50</option> <option value="100">100</option> </select> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Creating..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Create RSS </button> <button class="action-panel-cancel" aria-label="Close 'Your RSS' panel" ref="linksrc=close_rss_panel" aria-controls="rss-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> <div class="action-panel-control-wrap rss-link-copy-wrap"> <label for="rss-link" class="usa-sr-only">RSS Link</label> <input placeholder="Your RSS Feed Link" type="text" name="rss-link" id="rss-link" class="rss-link" title="RSS Link"> <button type="button" disabled class="rss-link-copy-button disabled" data-ga-category="save_share" data-ga-action="rss" data-ga-label="copy"> Copy </button> </div> </form> </div> </div> </div> </div> <div class="article-page" id="article-page" data-article-pmid="29988169"> <aside class="page-sidebar"> <div class="inner-wrap"> <div class="full-text-links"> <div class="full-view"> <h3 class="title"> Full text links </h3> <div class="full-text-links-list"> <a class="link-item dialog-focus" href="https://doi.org/10.1038/s41559-018-0599-y" target="_blank" rel="noopener" ref="linksrc=fulltextorjournal_fulltext&is_pmc=False&PrId=3094&itool=Abstract-def&log$=linkouticon&uid=29988169&db=pubmed&nlmid=101698577" title="See full text options at Nature Publishing Group" data-ga-category="full_text" data-ga-action="Nature Publishing Group" data-ga-label="29988169" ><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/https:--www.nature.com-static-images-logos-nature-portfolio-120.png" alt="Nature Publishing Group full text link"><span class="text"> Nature Publishing Group </span></a> </div> </div> <div class="short-view"> <a href="#" class="full-text-links-button full-text-links-dialog-trigger"> Full text links </a> </div> </div> <div class="actions-buttons sidebar"><h3 class="title">Actions</h3><div class="inner-wrap"><button class="citation-button citation-dialog-trigger" aria-label="Open dialog with citation text in different styles" data-ga-category="save_share" data-ga-action="cite" data-ga-label="open" data-all-citations-url="/29988169/citations/" data-citation-style="nlm" data-pubmed-format-link="/29988169/export/"><span class="button-label">Cite</span></button><link type="text/css" href="ncbi-overlay-block/src/overlay-block.css"><div class="collections-button-container" data-article-id="29988169" data-article-db="pubmed"><button class="collections-button collections-dialog-trigger" aria-label="Save article in MyNCBI collections." data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_button" data-collections-open-dialog-enabled="false" data-collections-open-dialog-url="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F29988169%2F%23open-collections-dialog" data-in-collections="false"><span class="button-label">Collections</span></button><div class="overlay" role="dialog"><div id="collections-action-dialog" class="dialog collections-dialog" aria-hidden="true"><div 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for="collections-action-dialog-new">Create a new collection</label></li><li><input type="radio" id="collections-action-dialog-existing" class="collections-existing" name="collections" value="existing" checked="true" data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_radio_existing"><label for="collections-action-dialog-existing">Add to an existing collection</label></li></ul></div><div class="controls-wrapper"><div class="action-panel-control-wrap new-collections-controls"><label for="collections-action-dialog-add-to-new" class="action-panel-label required-field-asterisk"> Name your collection: </label><input type="text" name="add-to-new-collection" id="collections-action-dialog-add-to-new" class="collections-action-add-to-new" pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/" maxlength="100" data-ga-category="collections_button" data-ga-action="create_collection" data-ga-label="non_favorties_collection"><div class="collections-new-name-too-long usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div></div><div class="action-panel-control-wrap existing-collections-controls"><label for="collections-action-dialog-add-to-existing" class="action-panel-label"> Choose a collection: </label><select id="collections-action-dialog-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="collections_button" data-ga-action="select_collection" data-ga-label="($('.collections-action-add-to-existing').val() === 'Favorites') ? 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journal Nature ecology & evolution" data-pinger-ignore> Nat Ecol Evol </button><div id="full-view-journal" class="journal-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for journal Nature ecology & evolution"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Nat+Ecol+Evol%22%5Bjour%5D&sort=date&sort_order=desc" data-href="/?term=%22Nat+Ecol+Evol%22%5Bjour%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_journal_name_link&journal_abbrev=Nat Ecol Evol" data-ga-category="search" data-ga-action="journal_link" data-ga-label="Nat Ecol Evol"> Search in PubMed </a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link" ref ="linksrc=search_in_nlm_catalog_link" href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22Nat+Ecol+Evol%22%5BTitle+Abbreviation%5D" data-ga-category="search_catalog" data-ga-action="journal_link" data-ga-label="Nat Ecol Evol"> Search in NLM Catalog </a></li><li><a class="add-to-search-link dropdown-block-link" ref ="linksrc=add_to_search_link" role="button" data-search-term='"Nat Ecol Evol"[jour]' data-ga-category="search" data-ga-action="add_to_search" data-ga-label='"Nat Ecol Evol"[jour]' href="#"> Add to Search </a></li></ul></div></div></div><span class="period">. </span><span class="cit">2018 Aug;2(8):1227-1232.</span> </div> <span class="citation-doi"> doi: 10.1038/s41559-018-0599-y. </span> <span class="secondary-date"> Epub 2018 Jul 9. </span> </div> <h1 class="heading-title"> An early trend towards gigantism in Triassic sauropodomorph dinosaurs </h1> <div class="inline-authors"> <div class="authors"> <div class="authors-list"> <span class="authors-list-item "><a class="full-name" href="/?term=Apaldetti+C&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Cecilia Apaldetti">Cecilia Apaldetti</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina. capaldetti@unsj.edu.ar." href="#full-view-affiliation-1" ref="linksrc=author_aff"> 1 </a><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina. capaldetti@unsj.edu.ar." href="#full-view-affiliation-2" ref="linksrc=author_aff"> 2 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Mart%C3%ADnez+RN&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Ricardo N Martínez">Ricardo N Martínez</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina." href="#full-view-affiliation-3" ref="linksrc=author_aff"> 3 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Cerda+IA&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Ignacio A Cerda">Ignacio A Cerda</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Instituto de Investigación en Paleobiología y Geología, Museo Carlos Ameghino, Universidad Nacional de Río Negro, Río Negro, Argentina." href="#full-view-affiliation-4" ref="linksrc=author_aff"> 4 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Pol+D&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Diego Pol">Diego Pol</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina." href="#full-view-affiliation-5" ref="linksrc=author_aff"> 5 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Alcober+O&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Oscar Alcober">Oscar Alcober</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina." href="#full-view-affiliation-3" ref="linksrc=author_aff"> 3 </a></sup></span> </div> </div> </div> <div class="short-article-details"> Affiliations <button class="more-details" id="toggle-authors" data-alt-text="Collapse" aria-controls="expanded-authors" aria-expanded="false" data-pinger-ignore data-fetch-url="/29988169/long-authors/" data-id-prefix=""> <span class="title"> Expand </span> </button> </div> <div class="extended-article-details" id="expanded-authors" aria-hidden="true"> <div class="expanded-authors" id="full-view-expanded-authors"> <div class="affiliations"> <h3 class="title"> Affiliations </h3> <ul class="item-list"> <li data-affiliation-id="full-view-affiliation-1" id="full-view-affiliation-1" ><sup class="key">1</sup> Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina. capaldetti@unsj.edu.ar.</li> <li data-affiliation-id="full-view-affiliation-2" id="full-view-affiliation-2" ><sup class="key">2</sup> CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina. capaldetti@unsj.edu.ar.</li> <li data-affiliation-id="full-view-affiliation-3" id="full-view-affiliation-3" ><sup class="key">3</sup> Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina.</li> <li data-affiliation-id="full-view-affiliation-4" id="full-view-affiliation-4" ><sup class="key">4</sup> CONICET-Instituto de Investigación en Paleobiología y Geología, Museo Carlos Ameghino, Universidad Nacional de Río Negro, Río Negro, Argentina.</li> <li data-affiliation-id="full-view-affiliation-5" id="full-view-affiliation-5" ><sup class="key">5</sup> CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina.</li> </ul> </div> </div> </div> <ul class="identifiers" id="full-view-identifiers"> <li> <span class="identifier pubmed"> <span class="id-label"> PMID: </span> <strong class="current-id" title="PubMed ID">29988169</strong> </span> </li> <li> <span class="identifier doi"> <span class="id-label"> DOI: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=10.1038/s41559-018-0599-y&id_type=DOI" href="https://doi.org/10.1038/s41559-018-0599-y" data-ga-category="full_text" data-ga-action="DOI" > 10.1038/s41559-018-0599-y </a> </span> </li> </ul> <div class="in-clipboard-label " hidden> Item in Clipboard </div> </div> <div class="short-view" id="short-view-heading"> <h1 class="heading-title"> An early trend towards gigantism in Triassic sauropodomorph dinosaurs </h1> <div class="short-citation"> <span class="authors-list"> <span class="authors-list-item "><span class="full-name">Cecilia Apaldetti</span><span class="citation-separator"> et al.</span></span> </span> <span class="citation-journal"> Nat Ecol Evol<span class="citation-separator">.</span> </span> <span class="date"> <span class="citation-year">2018 Aug</span><span class="citation-separator">.</span> </span> </div> <div class="more-article-details-section with-display-settings"> <button class="more-article-details" id="toggle-article-details" data-alt-text="Hide details" ref="linksrc=toggle_article_details" aria-controls="full-article-details" aria-expanded="false" data-fetch-url="/29988169/long-authors/" data-id-prefix=""> <span class="title">Show details</span> </button> <div class="display-options" data-format-key="format" data-default-format-value="abstract" data-current-format-value="abstract" role="region"> <button class="trigger usa-button" title="Change format" data-ga-category="display_options" data-ga-action="display_options_dialog"> <span class="button-label">Display options</span> </button> <div class="dropdown" hidden> <div class="title"> Display options </div> <div class="content"> <div class="format-container"> <span class="option-label"> Format </span> <select name="format" data-initial-value="abstract" aria-label="Display format" id="mobile-display-format"> <option value="abstract">Abstract</option> <option value="pubmed">PubMed</option> <option value="pmid">PMID</option> </select> </div> </div> </div> </div> </div> <div class="extended-article-details" id="full-article-details" aria-hidden="true"> <div class="article-citation"> <div class="article-source"> <div class="journal-actions dropdown-block"><button id="short-view-journal-trigger" class="journal-actions-trigger trigger" ref="linksrc=journal_actions_btn" title="Nature ecology & evolution" tabindex="0" aria-controls="short-view-journal" aria-expanded="false" aria-label="Toggle dropdown menu for journal Nature ecology & evolution" data-pinger-ignore> Nat Ecol Evol </button><div id="short-view-journal" class="journal-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for journal Nature ecology & evolution"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Nat+Ecol+Evol%22%5Bjour%5D&sort=date&sort_order=desc" data-href="/?term=%22Nat+Ecol+Evol%22%5Bjour%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_journal_name_link&journal_abbrev=Nat Ecol Evol" data-ga-category="search" data-ga-action="journal_link" data-ga-label="Nat Ecol Evol"> Search in PubMed </a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link" ref ="linksrc=search_in_nlm_catalog_link" href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22Nat+Ecol+Evol%22%5BTitle+Abbreviation%5D" data-ga-category="search_catalog" data-ga-action="journal_link" data-ga-label="Nat Ecol Evol"> Search in NLM Catalog </a></li><li><a class="add-to-search-link dropdown-block-link" ref ="linksrc=add_to_search_link" role="button" data-search-term='"Nat Ecol Evol"[jour]' data-ga-category="search" data-ga-action="add_to_search" data-ga-label='"Nat Ecol Evol"[jour]' href="#"> Add to Search </a></li></ul></div></div></div><span class="period">. </span><span class="cit">2018 Aug;2(8):1227-1232.</span> </div> <span class="citation-doi"> doi: 10.1038/s41559-018-0599-y. </span> <span class="secondary-date"> Epub 2018 Jul 9. </span> </div> <div class="expanded-authors" id="short-view-expanded-authors"> <div class="authors"> <h3 class="title"> Authors </h3> <div class="authors-list"> <span class="authors-list-item "><a class="full-name" href="/?term=Apaldetti+C&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Cecilia Apaldetti">Cecilia Apaldetti</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina. capaldetti@unsj.edu.ar." href="#short-view-affiliation-1" ref="linksrc=author_aff"> 1 </a><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina. capaldetti@unsj.edu.ar." href="#short-view-affiliation-2" ref="linksrc=author_aff"> 2 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Mart%C3%ADnez+RN&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Ricardo N Martínez">Ricardo N Martínez</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina." href="#short-view-affiliation-3" ref="linksrc=author_aff"> 3 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Cerda+IA&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Ignacio A Cerda">Ignacio A Cerda</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Instituto de Investigación en Paleobiología y Geología, Museo Carlos Ameghino, Universidad Nacional de Río Negro, Río Negro, Argentina." href="#short-view-affiliation-4" ref="linksrc=author_aff"> 4 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Pol+D&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Diego Pol">Diego Pol</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina." href="#short-view-affiliation-5" ref="linksrc=author_aff"> 5 </a></sup><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Alcober+O&cauthor_id=29988169" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Oscar Alcober">Oscar Alcober</a><sup class="affiliation-links"><span class="author-sup-separator"> </span><a class="affiliation-link" title="Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina." href="#short-view-affiliation-3" ref="linksrc=author_aff"> 3 </a></sup></span> </div> </div> <div class="affiliations"> <h3 class="title"> Affiliations </h3> <ul class="item-list"> <li data-affiliation-id="short-view-affiliation-1" id="short-view-affiliation-1" ><sup class="key">1</sup> Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina. capaldetti@unsj.edu.ar.</li> <li data-affiliation-id="short-view-affiliation-2" id="short-view-affiliation-2" ><sup class="key">2</sup> CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina. capaldetti@unsj.edu.ar.</li> <li data-affiliation-id="short-view-affiliation-3" id="short-view-affiliation-3" ><sup class="key">3</sup> Instituto y Museo de Ciencias Naturales, Centro de Investigaciones de la Geósfera y la Biósfera (CIGEOBIO), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina.</li> <li data-affiliation-id="short-view-affiliation-4" id="short-view-affiliation-4" ><sup class="key">4</sup> CONICET-Instituto de Investigación en Paleobiología y Geología, Museo Carlos Ameghino, Universidad Nacional de Río Negro, Río Negro, Argentina.</li> <li data-affiliation-id="short-view-affiliation-5" id="short-view-affiliation-5" ><sup class="key">5</sup> CONICET-Museo Paleontológico Egidio Feruglio, Trelew, Argentina.</li> </ul> </div> </div> <ul class="identifiers" id="short-view-identifiers"> <li> <span class="identifier pubmed"> <span class="id-label"> PMID: </span> <strong class="current-id" title="PubMed ID">29988169</strong> </span> </li> <li> <span class="identifier doi"> <span class="id-label"> DOI: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=10.1038/s41559-018-0599-y&id_type=DOI" href="https://doi.org/10.1038/s41559-018-0599-y" data-ga-category="full_text" data-ga-action="DOI" > 10.1038/s41559-018-0599-y </a> </span> </li> </ul> <div class="in-clipboard-label " hidden> Item in Clipboard </div> </div> </div> </header> <div class="actions-buttons inline"><div class="inner-wrap"><button class="full-text-links-button full-text-links-dialog-trigger" title="Open dialog with full text links" ref="linksrc=full_text_links"> Full text links </button><button class="citation-button citation-dialog-trigger" aria-label="Open dialog with citation text in different styles" data-ga-category="save_share" data-ga-action="cite" data-ga-label="open" data-all-citations-url="/29988169/citations/" data-citation-style="nlm" data-pubmed-format-link="/29988169/export/"><span class="button-label">Cite</span></button><button class="more-actions-button more-actions-dialog-trigger" title="Open dialog with more actions to take" ref="linksrc=more_actions_btn"></button><div class="display-options" data-format-key="format" data-default-format-value="abstract" data-current-format-value="abstract" role="region"><button class="trigger usa-button" title="Change format" data-ga-category="display_options" data-ga-action="display_options_dialog"><span class="button-label">Display options</span></button><div class="dropdown" hidden><div class="title"> Display options </div><div class="content"><div class="format-container"><span class="option-label"> Format </span><select name="format" data-initial-value="abstract" aria-label="Display format" id="inline-actions-display-format"><option value="abstract">Abstract</option><option value="pubmed">PubMed</option><option value="pmid">PMID</option></select></div></div></div></div></div></div> <div class="abstract" id="abstract"> <h2 class="title"> Abstract </h2> <div class="abstract-content selected" id="eng-abstract"> <p> Dinosaurs dominated the terrestrial ecosystems for more than 140 Myr during the Mesozoic era, and among them were sauropodomorphs, the largest land animals recorded in the history of life. Early sauropodomorphs were small bipeds, and it was long believed that acquisition of giant body size in this clade (over 10 tonnes) occurred during the Jurassic and was linked to numerous skeletal modifications present in Eusauropoda. Although the origin of gigantism in sauropodomorphs was a pivotal stage in the history of dinosaurs, an incomplete fossil record obscures details of this crucial evolutionary change. Here, we describe a new sauropodomorph from the Late Triassic of Argentina nested within a clade of other non-eusauropods from southwest Pangaea. Members of this clade attained large body size while maintaining a plesiomorphic cyclical growth pattern, displaying many features of the body plan of basal sauropodomorphs and lacking most anatomical traits previously regarded as adaptations to gigantism. This novel strategy highlights a highly accelerated growth rate, an improved avian-style respiratory system, and modifications of the vertebral epaxial musculature and hindlimbs as critical to the evolution of gigantism. This reveals that the first pulse towards gigantism in dinosaurs occurred over 30 Myr before the appearance of the first eusauropods. </p> </div> </div> <p class="disclaimer" id="disclaimer"> <a href="/disclaimer/" target="_blank" data-ga-category="literature_resources" data-ga-action="disclaimer_link" data-ga-label="under_abstract">PubMed Disclaimer</a> </p> <div class="similar-articles" id="similar"> <h2 class="title"> Similar articles </h2> <ul class="articles-list" id="similar-articles-list"> <li class="full-docsum"> <div class="docsum-content" style="display:inline;"> <a class="docsum-title" href="/34795322/" ref="article_id=34795322&linksrc=similar_articles_link&ordinalpos=1" data-ga-category="similar_article" data-ga-action="34795322" data-ga-label=""> Sauropodomorph evolution across the Triassic-Jurassic boundary: body size, locomotion, and their influence on morphological disparity. </a> <div class="docsum-citation full-citation"> <span class="docsum-authors full-authors">Apaldetti C, Pol D, Ezcurra MD, Martínez RN.</span> <span class="docsum-authors short-authors">Apaldetti C, et al.</span> <span class="docsum-journal-citation full-journal-citation">Sci Rep. 2021 Nov 18;11(1):22534. doi: 10.1038/s41598-021-01120-w.</span> <span class="docsum-journal-citation short-journal-citation">Sci Rep. 2021.</span> <span class="citation-part">PMID: <span class="docsum-pmid">34795322</span></span> <span class="free-resources spaced-citation-item citation-part">Free PMC article.</span> </div> </div> </li> <li class="full-docsum"> <div class="docsum-content" style="display:inline;"> <a class="docsum-title" href="/30270189/" ref="article_id=30270189&linksrc=similar_articles_link&ordinalpos=2" data-ga-category="similar_article" data-ga-action="30270189" data-ga-label=""> A Giant Dinosaur from the Earliest Jurassic of South Africa and the Transition to Quadrupedality in Early Sauropodomorphs. </a> <div class="docsum-citation full-citation"> <span class="docsum-authors full-authors">McPhee BW, Benson RBJ, Botha-Brink J, Bordy EM, Choiniere JN.</span> <span class="docsum-authors short-authors">McPhee BW, et al.</span> <span class="docsum-journal-citation full-journal-citation">Curr Biol. 2018 Oct 8;28(19):3143-3151.e7. doi: 10.1016/j.cub.2018.07.063. 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An early trend towards gigantism in Triassic sauropodomorph dinosaurs - PubMed