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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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