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Evolution of the side-necked turtles: The families Bothremydidae
They preserve the structures with amazing detail
It is a magnificent example of the Moroccan Leonaspis and Phacops
Boletim do Museu Nacional - Geologia 45:1-11) described the Coloborhynchus moroccensis species
In the following link you could find an article that deals with the study of a population of isolated teeth that come from this sector
04184 - Superb Pyritized 0.52 Inch Goniatites Devonian Cephalopod Fish Evolution of the side-necked turtles:Impressive example of this Devonian cephalopod. 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. The characteristic lines of suture of this cephalopod of the Paleozoic can be perfectly observed. Nice specimen.