2.1" Brachylophosaurus Fossil Vertebrae Bone Cretaceous Dinosaur Judith River MT COA

Location: Judith River Formation, Montana, United States (Private Land Origin) 

Weight: 2.1 Ounces

Dimensions: 2.1 Inches Long, 1.9 Inches Wide, 1.2 Inches Thick 

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Lived during the Late Cretaceous Age about 77 million years ago.

Name: Brachylophosaurus

Type: Herbivore

Size: About 9 meters long.

Brachylophosaurus is a Late Cretaceous hadrosaurid dinosaur known from fossil material discovered in the Judith River Formation and the Oldman Formation. Dating to approximately 76.5 million years ago, this taxon represents a medium-sized member of the duck-billed dinosaur lineage, reaching an estimated length of 9 meters and a mass of roughly 7 metric tons. Its morphology indicates adaptation for efficient herbivory within highly productive coastal plain ecosystems.

One of the most diagnostic features of Brachylophosaurus is its flattened, paddle-like cranial crest, which differentiates it from other contemporaneous hadrosaurids. The species also possessed elongated forelimbs and an expanded upper beak suited to selective browsing. Well-developed cheek tissues and complex dental batteries enabled prolonged oral processing of vegetation, demonstrating advanced chewing mechanics rarely seen in reptiles but characteristic of ornithischian dinosaurs.

These adaptations underscore the ecological success of hadrosaurs during the Late Cretaceous and highlight Brachylophosaurus as an important taxon for understanding dinosaur feeding evolution.