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

This interval is used in the definition of 626 collections

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