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

Some of them have glued and tiny filled fractures

Its serrations are very well defined

It is conserved in its natural matrix

and rarely we can see a claw like the one we are displaying here

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.