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

This interval is used in the definition of 11 collections

A total of 10524 collections with 95254 occurrences lie within this time span