56 - 37.71 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, Lutetian age, Bartonian age, Ypresian age
• Cenozoic Subepochs: Early Eocene subepoch, Middle Eocene subepoch
• Mammal Paleogene Zones: MP 11 zone, MP 7 zone, MP 14 zone, MP 15 zone, MP 12 zone, MP 16 zone, MP 8 + 9 zone, MP 10 zone, MP 13 zone
• Paleogene Mammal Ages of Asia: Bumbanian age, Sharamurunian age, Arshantan age
• North American Land Mammal Ages: Bridgerian age, Duchesnean age, Clarkforkian age, Uintan age, Wasatchian age
• North American Mammal Subages/Zones: Twinbuttean subage, Cf1 zone, Early Uintan subage, Cf2 zone, Late Uintan subage, Graybullian subage, Cf3 zone, Sandcouleean subage, Blacksforkian subage, Lostcabinian subage, Lysitean subage, Gardnerbuttian subage
• South American Land Mammal Ages: Mustersan age, Casamayoran age, Divisaderan age
• Cretaceous-Cenozoic of New Zealand: Dannevirke epoch, Kaiatan age, Waipawan age, Mangaorapan age, Heretaungan age, Bortonian age, Arnold epoch, Porangan age

This interval is used in the definition of 11 collections

A total of 10613 collections with 96656 occurrences lie within this time span