37.71 - 33.9 Ma

The definition of this interval in the timescale Paleogene Mammal Ages of Asia is taken from the following source:

• J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view

There are intervals in 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Eocene epoch, Priabonian age
• Cenozoic Subepochs: Late Eocene subepoch
• Mammal Paleogene Zones: MP 17A zone, MP 20 zone, MP 19 zone, MP 18 zone, MP 17B zone
• Paleogene Mammal Ages of Asia: Houldjinian age, Ergilian age
• North American Land Mammal Ages: Duchesnean age, Chadronian age
• North American Mammal Subages/Zones: Early Chadronian subage, Middle Chadronian subage, Late Chadronian subage
• South American Land Mammal Ages: Divisaderan age, Tinguirirican age
• Cretaceous-Cenozoic of New Zealand: Landon epoch, Whaingaroan age, Kaiatan age, Runangan age, Arnold epoch

This interval is used in the definition of 5 collections

A total of 3039 collections with 32898 occurrences lie within this time span