J488 - Ultra Rare Pachycephalosaurus wyomingensis Foot Claw - Late Cretaceous - Hell Creek Fm Deanaspis golfussi with high concentrations of OH−

with high concentrations of OH−

carbonate (32)

It has only been excavated from the matrix in order to make it visible

Age: Lower Cretaceous

Impressive natural association with one specimen of the genus Acanthopyge and other specimen of the genus Phacops

J488 - Ultra Rare Pachycephalosaurus wyomingensis Foot Claw - Late Cretaceous - Hell Creek Fm Deanaspis golfussi with high concentrations of OH−Pachycephalosaurus wyomingensis, a thick skulled herbivorous dinosaur from the Late Cretaceous (approx. 70 66 million years ago), has been discovered in the Hell Creek Formation of South Dakota. Fossil evidence, including vertebrae and cranial material, indicates they inhabited the region alongside T. rex and Triceratops. South Dakota Finds: Notable fossils, including vertebrae (e. g., specimen V7019), have been recovered from the Hell Creek