Editing Litopterna (section)

== Ecology ==
Litopterns were likely [[hindgut fermenters]].<ref name="Croft-2021">{{Cite journal |last1=Croft |first1=Darin A. |last2=Lorente |first2=Malena |date=2021-08-17 |editor-last=Smith |editor-first=Thierry |title=No evidence for parallel evolution of cursorial limb adaptations among Neogene South American native ungulates (SANUs) |journal=PLOS ONE |language=en |volume=16 |issue=8 |pages=e0256371 |doi=10.1371/journal.pone.0256371 |issn=1932-6203 |pmc=8370646 |pmid=34403434 |doi-access=free }}</ref> At least some macraucheniids like ''Macrauchenia'' are suggested to have been mixed feeders feeding on both browse and grass.<ref>{{Cite journal |last1=de Oliveira |first1=Karoliny |last2=Asevedo |first2=Lidiane |last3=Calegari |first3=Marcia R. |last4=Gelfo |first4=Javier N. |last5=Mothé |first5=Dimila |last6=Avilla |first6=Leonardo |date=August 2021 |title=From oral pathology to feeding ecology: The first dental calculus paleodiet study of a South American native megamammal |url=https://linkinghub.elsevier.com/retrieve/pii/S0895981121001280 |journal=Journal of South American Earth Sciences |language=en |volume=109 |pages=103281 |doi=10.1016/j.jsames.2021.103281|bibcode=2021JSAES.10903281D |s2cid=233678648 |url-access=subscription }}</ref> Sparnotheriodontids are suggested to have been [[Browsing (herbivory)|browsers]].<ref>{{Cite journal |last1=Bond |first1=M. |last2=Reguero |first2=M. A. |last3=Vizcaíno |first3=S. F. |last4=Marenssi |first4=S. A. |date=January 2006 |title=A new 'South American ungulate' (Mammalia: Litopterna) from the Eocene of the Antarctic Peninsula |url=https://www.lyellcollection.org/doi/10.1144/GSL.SP.2006.258.01.12 |journal=Geological Society, London, Special Publications |language=en |volume=258 |issue=1 |pages=163–176 |doi=10.1144/GSL.SP.2006.258.01.12 |issn=0305-8719|url-access=subscription }}</ref> Some proterotheriids are suggested to have been browsers,<ref>{{Cite journal |last1=Morosi |first1=Elizabeth |last2=Ubilla |first2=Martin |date=2019-02-07 |title=Dietary and palaeoenvironmental inferences in Neolicaphrium recens Frenguelli, 1921 (Litopterna, Proterotheriidae) using carbon and oxygen stable isotopes (Late Pleistocene; Uruguay) |url=https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1355914 |journal=Historical Biology |language=en |volume=31 |issue=2 |pages=196–202 |doi=10.1080/08912963.2017.1355914 |s2cid=133673644 |issn=0891-2963|url-access=subscription }}</ref> while some members proterotheriid subfamily Megadolodinae like ''[[Megadolodus]]'' have been suggested to have been [[Omnivore|omnivorous]] with at least part of their diet consisting of hard fruit.<ref name="Carrillo-2023" />