56 - 47.8 Ma

The definition of this interval in the timescale Mammal Paleogene Zones is taken from the following source:

• M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view

There are intervals in 8 timescales which overlap this one. show

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

This interval is used in the definition of 11 collections

A total of 4983 collections with 39316 occurrences lie within this time span