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 9 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Bartonian age, Lutetian age, Eocene epoch, Ypresian age
• Cenozoic Subepochs: Middle Eocene subepoch, Early Eocene subepoch
• Mammal Paleogene Zones: MP 13 zone, MP 10 zone, MP 14 zone, MP 11 zone, MP 7 zone, MP 15 zone, MP 12 zone, MP 8 + 9 zone, MP 16 zone
• Paleogene Mammal Ages of Asia: Arshantan age, Sharamurunian age, Bumbanian age
• North American Land Mammal Ages: Clarkforkian age, Wasatchian age, Bridgerian age, Uintan age, Duchesnean age
• North American Mammal Subages/Zones: Cf3 zone, Blacksforkian subage, Gardnerbuttian subage, Graybullian subage, Lostcabinian subage, Sandcouleean subage, Late Uintan subage, Lysitean subage, Early Uintan subage, Cf1 zone, Twinbuttean subage, Cf2 zone
• South American Land Mammal Ages: Casamayoran age, Mustersan age, Divisaderan age
• Calcareous Nannoplankton Zones: NP15 zone, NP9 zone, NP12 zone, NP16 zone, NP13 zone, NP10 zone, NP14 zone, NP17 zone, NP11 zone
• Cretaceous-Cenozoic of New Zealand: Arnold epoch, Heretaungan age, Bortonian age, Porangan age, Mangaorapan age, Waipawan age, Kaiatan age, Dannevirke epoch

This interval is used in the definition of 11 collections

A total of 10761 collections with 98087 occurrences lie within this time span