Editing Megafauna (section)

===In giant turtles===
[[Giant tortoise]]s were important components of late [[Cenozoic]] megafaunas, being present in every nonpolar continent until the arrival of [[hominina]]ns.<ref name="Hansen">{{Cite journal
 |last=Hansen
 |first=D. M.
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 |journal=[[Ecography (journal)|Ecography]]
 |volume=33
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 |date=April 2010
 |url=http://www.advancedconservation.org/library/hansen_etal_2010.pdf
 |doi=10.1111/j.1600-0587.2010.06305.x
 |bibcode=2010Ecogr..33..272H
 |access-date=2011-02-26
 |archive-url=https://web.archive.org/web/20110724224354/http://www.advancedconservation.org/library/hansen_etal_2010.pdf
 |archive-date=July 24, 2011
}}</ref><ref name="Cione">{{Cite journal
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 |author3=Soibelzon, L.
 |title=The Broken Zig-Zag: Late Cenozoic large mammal and tortoise extinction in South America
 |journal=Rev. Mus. Argentino Cienc. Nat. |series=Nueva Serie
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 |year=2003
 |issn=1514-5158
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 |doi-access=free
 }}</ref> The largest known terrestrial tortoise was ''[[Megalochelys atlas]]'', an animal that probably weighed about {{cvt|1,000|kg}}.<ref>{{Citation |last1=Gordon |first1=Iain J. |title=The Ecology of Browsing and Grazing in Other Vertebrate Taxa |date=2019 |work=The Ecology of Browsing and Grazing II |pages=339–404 |editor-last=Gordon |editor-first=Iain J. |url=|place=Cham |publisher=Springer International Publishing |language=en |doi=10.1007/978-3-030-25865-8_15 |isbn=978-3-030-25865-8 |last2=Prins |first2=Herbert H. T. |last3=Mallon |first3=Jordan |last4=Puk |first4=Laura D. |last5=Miranda |first5=Everton B. P. |last6=Starling-Manne |first6=Carolina |last7=van der Wal |first7=René |last8=Moore |first8=Ben |last9=Foley |first9=William |editor2-last=Prins |editor2-first=Herbert H. T.}}</ref>

Some earlier aquatic Testudines, e.g. the marine ''[[Archelon]]'' of the Cretaceous<ref>{{Cite journal |last1=Jaffe |first1=Alexander L. |last2=Slater |first2=Graham J. |last3=Alfaro |first3=Michael E. |date=2011-08-23 |title=The evolution of island gigantism and body size variation in tortoises and turtles |journal=Biology Letters |language=en |volume=7 |issue=4 |pages=558–561 |doi=10.1098/rsbl.2010.1084 |issn=1744-9561 |pmc=3130210 |pmid=21270022}}</ref> and freshwater ''[[Stupendemys]]'' of the Miocene, were considerably larger, weighing more than {{cvt|2,000|kg}}.<ref>{{Cite journal |last1=Cadena |first1=Edwin-Alberto |last2=Link |first2=Andrés |last3=Cooke |first3=Siobhán B. |last4=Stroik |first4=Laura K. |last5=Vanegas |first5=Andrés F. |last6=Tallman |first6=Melissa |date=December 2021 |title=New insights on the anatomy and ontogeny of the largest extinct freshwater turtles |url=|journal=Heliyon |volume=7 |issue=12 |pages=e08591 |doi=10.1016/j.heliyon.2021.e08591 |doi-access=free |pmid=35005268 |pmc=8717240 |bibcode=2021Heliy...708591C |issn=2405-8440}}</ref>