56 - 47.8 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, Eocene epoch
• Cenozoic Subepochs: Early Eocene subepoch
• Mammal Paleogene Zones: MP 7 zone, MP 8 + 9 zone, MP 10 zone
• Paleogene Mammal Ages of Asia: Irdinmanhan age, Sharamurunian age, Arshantan age
• North American Land Mammal Ages: Bridgerian age, Wasatchian age, Clarkforkian age
• North American Mammal Subages/Zones: Cf1 zone, Twinbuttean subage, Gardnerbuttian subage, Graybullian subage, Cf2 zone, Lysitean subage, Sandcouleean subage, Cf3 zone, Blacksforkian subage, Lostcabinian subage
• South American Land Mammal Ages: Mustersan age, Casamayoran age
• Cretaceous-Cenozoic of New Zealand: Dannevirke epoch, Mangaorapan age, Heretaungan age, Waipawan age

This interval is used in the definition of 5 collections

A total of 4975 collections with 39253 occurrences lie within this time span