This is an authentic Triceratops rib fragment from the Hell Creek Formation of Montana, dating to the Late Cretaceous approximately 68–66 million years ago. This specimen preserves predation marks — direct evidence of interaction between Triceratops and the carnivores of its ecosystem, most likely Tyrannosaurus rex, the apex predator that shared these ancient landscapes.

Predation marks on Triceratops bones are documented evidence of the ecological relationship between these two iconic dinosaurs. Whether inflicted during a hunting attempt, scavenging event, or fatal encounter, tooth traces like these offer a rare glimpse into the violent realities of Late Cretaceous life. Specimens preserving such taphonomic evidence are significantly more desirable to collectors than unmarked skeletal elements, as they carry a story beyond simple anatomy.

This specimen measures 4.12 inches and has received no repairs or restoration, preserving its complete fossil integrity. It is presented in a Riker display case for secure storage and presentation. Triceratops was among the last and largest of the ceratopsians — a massive three-horned herbivore that browsed the coastal plains and floodplains of Late Cretaceous North America alongside Edmontosaurus, Ankylosaurus, and the tyrannosaurs that preyed upon them.

Specimen Highlights:

• Type: Authentic Triceratops rib fragment with predation marks
• Dimensions: 4.20 inches
• Condition: No repairs or restoration
• Provenance: Hell Creek Formation, Late Cretaceous (~68–66 million years ago), Montana
• Source: Acquired from a trusted paleontologist
• Display: Includes Riker display case
• Authenticity Guarantee: 100% genuine dinosaur fossil

Feel free to reach out with any questions about this specimen or for additional photos. Ships securely packaged with care. Thank you for supporting ethical fossil collecting!