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October 1, 2020

Lower jaw bone of juvenile dromaeosaurid

One tiny tooth erupts from the lower jaw bone of the first juvenile dromaeosaurid fossil found on the North Slope of Alaska. A group of predatory dinosaurs closely related to birds, Dromaeosaurids were thought to be migratory, but discovery of this jaw bone supports a growing theory that some Cretaceous Arctic dinosaurs did not migrate with the seasons, but were year-round residents.

[Research supported by U.S. National Science Foundation grants OPP 0424594 and OPP 0425636.]

Learn more about this research in the Southern Methodist University news story Alaskan discovery of jaw bone from tiny, juvenile predator changes assumptions about dinosaur migration; or view the researcher's Project Log. (Date image taken: Specimen collected in 2007; analysis done in 2019; artwork created in 2020; date originally posted to NSF Multimedia Gallery: Oct. 1, 2020)

Credit: Photo by A. Chiarenza; courtesy Anthony R. Fiorillo

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