Lot 76
North America, Western United States, Wyoming, Niobrary County, Lance Formation, late Cretaceous, ca. 69 to 66 million years ago. This lower proper left jawbone fragment of a Triceratops prominently features the coronoid process, which juts upward as part of its structure. This process is a key anatomical feature, serving as an attachment point for muscles involved in jaw movement. The fossilized bone fragment showcases the characteristic robustness typical of ceratopsian dinosaurs, which was adapted to grind up tough plant material. The Triceratops skull itself was heavy and distinctive: with three prominent horns, a parrot-like beak, and a frill that could reach three feet in width, it ranks among the largest skulls known from any land animal - this sizable fragment can attest to that! Size: 13" L x 6.5" W x 6.3" H (33 cm x 16.5 cm x 16 cm)
The Lance Formation is known for yielding Triceratops fossils. Located in parts of Wyoming, Montana, and the Dakotas, this Late Cretaceous geological formation (70 to 66 million years ago) preserves a rich array of dinosaur fossils, including specimens of Triceratops. These iconic herbivores thrived in the Lance Formation's floodplain environment, grazing on lush vegetation and coexisting with other well-known dinosaurs like Tyrannosaurus rex and Edmontosaurus. The first triceratops specimen was discovered just west of Denver, Colorado, in the town of Morrison, in 1887, by Arthur Lakes and named by Othniel Charles Marsh. In life, these herbivores grew to over twenty feet long and could weigh over 10,000 pounds! Interestingly, most horned animals travel in herds, but the triceratops has been found more frequently in individual contexts. Puncture marks on the fossil frills of males of the species show that they used their horns to fight each other, with some paleontologists believing that this was done to impress females. Finds of blood vessels throughout the horns and frills of these animals suggest that they were not just weapons, but were also used for identification of individuals, much like the antlers and horns of modern species like reindeer and mountain goats.
Provenance: Private Berthoud, Colorado, USA collection
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#190710
- Condition: Large fragment as shown, missing the front half / predentary or dentary symphysis area. Pieces reattached with adhesive and stabilizing material added to larger cracks, but over 95% original material.
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