{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Tagliavento M"],"funding":["Deutsche Forschungsgemeinschaft"],"pagination":["e2213987120"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10104568"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["120(15)"],"pubmed_abstract":["The dinosaur-bird transition involved several anatomical, biomechanical, and physiological modifications of the theropod bauplan. Non-avian maniraptoran theropods, such as <i>Troodon</i>, are key to better understand changes in thermophysiology and reproduction occurring during this transition. Here, we applied dual clumped isotope (Δ<sub>47</sub> and Δ<sub>48</sub>) thermometry, a technique that resolves mineralization temperature and other nonthermal information recorded in carbonates, to eggshells from <i>Troodon</i>, modern reptiles, and modern birds. <i>Troodon</i> eggshells show variable temperatures, namely 42 and 29 ± 2 °C, supporting the hypothesis of an endothermic thermophysiology with a heterothermic strategy for this extinct taxon. Dual clumped isotope data also reveal physiol"],"journal":["Proceedings of the National Academy of Sciences of the United States of America"],"pubmed_title":["Evidence for heterothermic endothermy and reptile-like eggshell mineralization in <i>Troodon</i>, a non-avian maniraptoran theropod."],"pmcid":["PMC10104568"],"funding_grant_id":["FI-948-11/1","FI-948-13/1"],"pubmed_authors":["Davies AJ","Therrien F","Guo W","Schulp AS","Bernecker M","Staudigel PT","Muller W","Dietzel M","Zelenitsky DK","Tagliavento M","Fiebig J","Dawson RR","Gotschl K","Gerdes A"],"additional_accession":[]},"is_claimable":false,"name":"Evidence for heterothermic endothermy and reptile-like eggshell mineralization in <i>Troodon</i>, a non-avian maniraptoran theropod.","description":"The dinosaur-bird transition involved several anatomical, biomechanical, and physiological modifications of the theropod bauplan. Non-avian maniraptoran theropods, such as <i>Troodon</i>, are key to better understand changes in thermophysiology and reproduction occurring during this transition. Here, we applied dual clumped isotope (Δ<sub>47</sub> and Δ<sub>48</sub>) thermometry, a technique that resolves mineralization temperature and other nonthermal information recorded in carbonates, to eggshells from <i>Troodon</i>, modern reptiles, and modern birds. <i>Troodon</i> eggshells show variable temperatures, namely 42 and 29 ± 2 °C, supporting the hypothesis of an endothermic thermophysiology with a heterothermic strategy for this extinct taxon. Dual clumped isotope data also reveal physiol","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 Apr","modification":"2025-04-05T15:22:55.587Z","creation":"2025-04-05T15:22:55.587Z"},"accession":"S-EPMC10104568","cross_references":{"pubmed":["37011196"],"doi":["10.1073/pnas.2213987120"]}}