5.8" Hadrosaur (Kritosaurus) Jaw Section With Teeth - Texas

This a 5.8" long jaw section of a Hadrosaur (duck-billed dinosaur) from the Aguja Formation of Texas. It's likely from Kritosaurus navajovius, but little collecting and research has been done on the formation, so it's tough to put a definitive ID on it.

There are ten teeth that are in place and visible and they could probably be further exposed with additional prep work. There are several stabilized cracks in the jaw but no restoration.

This specimen was collected within the past year on private deeded property in Brewster County, Texas. You won't see any other dinosaur material from the Aguja & Javelina Formations for sale because nearly all of the formation lies the borders of Big Bend National Park or in Mexico, where laws prevent collection of fossils for sale. One of our partners was lucky enough to purchase several hundred acres of ranch land in Texas containing a good exposure of these formations.

These formations are equivalent age to the Judith River Formations in the Northern US and Alberta, Canada. Because relatively little collecting has been done on these formations in Texas, most of the species remain undescribed. Our partner has been putting important material into research collections and working with museums and researchers, so in the coming years their work will help lead to formal descriptions for these dinosaurs.

Artist reconstruction of Kritosaurus
Artist reconstruction of Kritosaurus

Kritosaurus navajovius
Javelina Creek Ranch, Brewster County, Texas
Upper Aguja Formation
5.8" long
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