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Mosasaur
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===Metabolism=== A study published in 2016 by T. Lyn Harrell, Alberto Pérez-Huerta and [[Celina A. Suarez|Celina Suarez]] showed that mosasaurs were [[endotherm]]ic. The study contradicted findings published in 2010 indicating mosasaurs were [[ectotherm]]ic. The 2010 study did not use warm-blooded animals for comparison but analogous groups of common marine animals. Based on comparisons with modern warm-blooded animals and fossils of known cold-blooded animals from the same time period, the 2016 study found mosasaurs likely had body temperatures similar to those of contemporary seabirds and were able to internally regulate their temperatures to remain warmer than the surrounding water.<ref>{{cite journal |last1=Harrell |first1=T. Lynn |last2=Pérez-Huerta |first2=Alberto |last3=Suarez |first3=Celina A. |last4=Benson |first4=Roger |title=Endothermic mosasaurs? Possible thermoregulation of Late Cretaceous mosasaurs (Reptilia, Squamata) indicated by stable oxygen isotopes in fossil bioapatite in comparison with coeval marine fish and pelagic seabirds |journal=Palaeontology |date=May 2016 |volume=59 |issue=3 |pages=351–363 |doi=10.1111/pala.12240|s2cid=130190966 |doi-access=free |bibcode=2016Palgy..59..351H }} *{{cite press release |date=May 6, 2016 |title=Scientists cite evidence that mosasaurs were warm-blooded |website=ScienceDaily |url=https://www.sciencedaily.com/releases/2016/05/160506160429.htm}}</ref>
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