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

This interval is used in the definition of 11 collections

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