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

This interval is used in the definition of 11 collections

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