Typotheria

Typotheria[1]; Temporal range: Late Paleocene–Middle Pleistocene PreЄ Є O S D C P T J K Pg N
	Mesotherium cristatum
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Notoungulata
Suborder:	†Typotheria; Zittel, 1892
Families
	†Archaeopithecidae; †Oldfieldthomasiidae; †Interatheriidae; †Campanorcidae; †Mesotheriidae;

Typotheria is a suborder of the extinct mammalian order Notoungulata and includes five families: Archaeopithecidae, Campanorcidae, Interatheriidae, Mesotheriidae, and Oldfieldthomasiidae. Cifelli[2] indicated that Typotheria would be paraphyletic if it excluded members of the suborder Hegetotheria and he advocated inclusion of the hegetothere families Archaeohyracidae and Hegetotheriidae in Typotheria.

References

McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, pp 462-465. ISBN 0-231-11013-8
Cifelli, Richard L. 1993. The phylogeny of the native South American ungulates. pp. 195-216 in F. S. Szalay, M. J. Novacek and M. C. McKenna (eds.) Mammal Phylogeny, Volume 2, Placentals. Springer-Verlag, New York. ISBN 0-387-97853-4

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