05219 - Beautiful Pyritized 0.69 Inch Phylloceras Lower Cretaceous Ammonites Cyclopyge Sister taxa: Cantioscyllium

Sister taxa: Cantioscyllium

Leonaspis is a widespread genus of odontopleurid trilobite that lived from the Late Ordovician to the late Middle Devonian

glued or fabricated

Reptilia - Squamata - Mosasauridae

It was very large

05219 - Beautiful Pyritized 0.69 Inch Phylloceras Lower Cretaceous Ammonites Cyclopyge Sister taxa: CantioscylliumSpecimen 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.