Notostylopidae

Notostylopidae Temporal range: Late Paleocene-Early Oligocene (Riochican-Tinguirirican) ~58.7–28.4  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Skull of Notostylops
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	† Notoungulata
Suborder:	† Notioprogonia
Family:	† Notostylopidae Ameghino 1897
Genera
† Boreastylops † Chilestylops † Edvardotrouessartia † Homalostylops † Notostylops † Otronia

Notostylopidae is an extinct family comprising five genera of notoungulate mammals known from the Late Paleocene (Riochican) to Early Oligocene (Tinguirirican) of Argentina, Brazil and Chile in South America ^[1]

References

1. McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN   0-231-11013-8