†suborder Litopterna Ameghino 1889 (placental)
Alternative spelling: Litopterni
Parent taxon: Panameriungulata according to L. S. Avilla and D. Mothé 2021
See also Ameghino 1894, Bond et al. 2006, Carroll 1988, Gadow 1898, Gregory 1910, Jaekel 1911, Kramarz et al. 2010, McKenna 1975, Shockey et al. 2009 and Welker et al. 2015
Sister taxon: Didolodontidae
Subtaxa: Adianthidae Eolicaphrium Eolitopterna Lambdaconus elegans Lopholipterna Macraucheniidae Mesorhinidae Notonychopidae Paulogervaisia celata Proacrodon Proacrodon transformatus Proadiantus gibbus Proterotheriidae Protolipternidae Sparnotheriodontidae Thoatheriopsis
Ecology: scansorial herbivore