06112 - Beautiful Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Concavotectum perfectly adapted to the marine

perfectly adapted to the marine ecosystems of the Cretaceous

Great association of two Prognathodon anceps (Mosasaur) teeth

They even have a groove like a claw but the other end does not have a joint where a toe phalanx bone would fit

The vertebral body is preserved

It is conserved in its natural matrix

06112 - Beautiful Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Concavotectum perfectly adapted to the marineSpecimen of extreme quality. 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.