Notioprogonia

Notioprogonia^[1] Temporal range: Late Paleocene–Early Oligocene PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Notoungulata
Suborder:	†Notioprogonia Simpson, 1934
Families
†Henricosborniidae †Notostylopidae

Notioprogonia is a suborder of the extinct mammalian order Notoungulata and includes two families, Henricosborniidae and Notostylopidae. Notioprogonia includes the most primitive notoungulates and ^[2] has argued that Notioprogonia is paraphyletic because it would include the ancestors of the remaining suborders.

Notes

Cifelli, Richard L. (1993). Szalay, F. S.; Novacek, M. J.; McKenna, M. C.. eds. The phylogeny of the native South American ungulates. 2, Placentals. New York: Springer-Verlag. ISBN 0-387-97853-4.
McKenna, Malcolm C.; Bell, Susan K. (1997). Classification of Mammals Above the Species Level. New York: Columbia University Press. ISBN 0-231-11013-8.