†suborder Pyrotheria Ameghino 1895 (placental mammal)
Parent taxon: Meridiungulata according to M. C. McKenna 1975
Sister taxa: Astrapotheria, Litopterna, Notoungulata, Trigonostylopoidea, Xenungulata
Subtaxa: Pyrotheridae, Pyrotheriidae
Ecology: scansorial herbivore