37.71 - 33.9 Ma

The definition of this interval in the timescale Cenozoic Subepochs is taken from the following source:

• W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view

There are intervals in 7 timescales which overlap this one. show

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

This interval is used in the definition of 1051 collections

A total of 3026 collections with 32720 occurrences lie within this time span