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April 13, 2022

Dental CT scans of lower molar of a rodent fossil

Dental CT scans show that mammal teeth became less diverse during the early Oligocene extinction events. This 3D tooth shape is of the lower molar of a rodent (Shazurus minutus) fossil in the anomaluroid family. The specimen is from the earliest late Eocene (approximately 37 million years ago) and was found in the Fayum Depression of northern Egypt.

[Research supported by U.S. National Science Foundation grants DBI 1612062, DBI 1458192, BCS 1824745 and DBI 2023087.]

Learn more in the Duke University news story The climate-driven mass extinction no one had seen. (Date image taken: 2020; date originally posted to NSF Multimedia Gallery: April 13, 2022)

Credit: Matt Borths, Duke Lemur Center, Duke University

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