07514 - Stunning Pyritized 1.28 Inch Unidentified Lower Cretaceous Ammonites Dinosaurs Prionocheilus narinosum

Prionocheilus narinosum

This bipedal dinosaur coexisted in the same ecosystems with the famous T-Rex

It only has some glued and tiny filled fractures but no fabrication

Synonym: Tetheodus Cope 1874

Full reference: E

07514 - Stunning Pyritized 1.28 Inch Unidentified Lower Cretaceous Ammonites Dinosaurs Prionocheilus narinosumSpecimen of extreme quality. Unidentified species. His suture lines are wonderfully well detailed. It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.