| 1. | They weighed up to and lived throughout the Oligocene in Eurasia.
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| 2. | The Oligocene Epoch spans from 33 million to 23 million years.
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| 3. | The pikas appeared somewhat later in the Oligocene of eastern Asia.
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| 4. | Rathbun referred specimens from the Pacific Northwest Oligocene to this genus.
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| 5. | This genus is present from the Upper Oligocene to the Recent.
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| 6. | Oligocene fossils in Florida provide evidence for a diverse terrestrial fauna.
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| 7. | Oligocene strata from West Germany have produced 27 multilayered gecko eggs.
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| 8. | The oldest geological units on Lombok are of Late Oligocene age.
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| 9. | This period consists of the Paleocene, Eocene, and Oligocene Epochs.
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| 10. | In Oligocene Africa, they were the dominant predatory group.
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