05026 - Beautiful Pyritized 1.79 Inch Phylloceras Lower Cretaceous Ammonites Hexanchus Still nowadays the Dromaeosauridae family

Still nowadays the Dromaeosauridae family has not been officially described in the dinosaur assemblage of the Upper Cretaceous of this sector

All these teeth have subequal buccal and lingual surfaces (with buccal surfaces slightly more inflated)

Wilson 2002 and Wilson and Sereno 1998

and future discoveries will continue to enrich our view of the dynamics of the early Phanerozoic radiation and of the nature of the fossil record

Subfamily: Mosasaurinae Williston

05026 - Beautiful Pyritized 1.79 Inch Phylloceras Lower Cretaceous Ammonites Hexanchus Still nowadays the Dromaeosauridae familySpecimen 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.