56 - 33.9 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

• K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

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

• International Chronostratigraphic Timescale: Ypresian age, Priabonian age, Bartonian age, Lutetian age
• Cenozoic Subepochs: Middle Eocene subepoch, Early Eocene subepoch, Late Eocene subepoch
• Mammal Paleogene Zones: MP 18 zone, MP 7 zone, MP 16 zone, MP 19 zone, MP 14 zone, MP 17A zone, MP 8 + 9 zone, MP 17B zone, MP 10 zone, MP 20 zone, MP 15 zone, MP 11 zone, MP 13 zone, MP 12 zone
• Paleogene Mammal Ages of Asia: Houldjinian age, Ulangochuian age, Ergilian age, Arshantan age, Bumbanian age, Irdinmanhan age, Sharamurunian age
• North American Land Mammal Ages: Duchesnean age, Wasatchian age, Chadronian age, Bridgerian age, Clarkforkian age, Uintan age
• North American Mammal Subages/Zones: Gardnerbuttian subage, Middle Chadronian subage, Late Uintan subage, Lysitean subage, Early Chadronian subage, Cf1 zone, Graybullian subage, Early Uintan subage, Sandcouleean subage, Lostcabinian subage, Cf3 zone, Twinbuttean subage, Cf2 zone, Blacksforkian subage, Late Chadronian subage
• South American Land Mammal Ages: Divisaderan age, Mustersan age, Tinguirirican age, Casamayoran age
• Cretaceous-Cenozoic of New Zealand: Porangan age, Heretaungan age, Mangaorapan age, Whaingaroan age, Landon epoch, Runangan age, Waipawan age, Dannevirke epoch, Bortonian age, Arnold epoch, Kaiatan age

This interval is used in the definition of 626 collections

A total of 13609 collections with 127719 occurrences lie within this time span