29.5 - 24.7 Ma

The definition of this interval in the timescale North American Mammal Subages/Zones is taken from the following source:

• J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 view

The top age has been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

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

• International Chronostratigraphic Timescale: Rupelian age, Oligocene epoch, Chattian age
• Cenozoic Subepochs: Early Oligocene subepoch, Late Oligocene subepoch
• Mammal Paleogene Zones: MP 29 zone, MP 24 zone, MP 28 zone, MP 30 zone, MP 26 zone, MP 27 zone, MP 23 zone, MP 21 zone, MP 25 zone, MP 22 zone
• Paleogene Mammal Ages of Asia: Tabenbulakian age, Kekeamuan age, Hsandagolian age
• North American Land Mammal Ages: Arikareean age
• North American Mammal Subages/Zones: early Late Arikareean subage, late Late Arikareean subage, early Early Arikareean subage, late Early Arikareean subage
• South American Land Mammal Ages: Deseadan age, Tinguirirican age
• Cretaceous-Cenozoic of New Zealand: Whaingaroan age, Landon epoch, Waitakian age, Duntroonian age

This interval is used in the definition of 117 collections

A total of 1808 collections with 15602 occurrences lie within this time span