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

This interval is used in the definition of 11 collections

A total of 10556 collections with 95401 occurrences lie within this time span