07582 - Great 8.78 Inch Hybodus Shark Dorsal Spine Cretaceous KemKem Beds Acanthopyge Then we leave a link

Then we leave a link to an interesting reading on the understanding of the paleoecology of these interesting ammonites:

Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms

The lithology of this body of sediment is characterized by the dominance of sandstones (also known as arenites) and fluvial gravel

Barrande 1868 (trilobite)

07582 - Great 8.78 Inch Hybodus Shark Dorsal Spine Cretaceous KemKem Beds Acanthopyge Then we leave a linkHybodus sp, Agassiz 1837 (elasmobranch) Chondrichthyes Hybodontiformes Hybodontidae Beautiful spine corresponding to the dorsal fin of this incredible shark that reigned the seas and the fluvial systems next to the coast during all the Mesozoic Era. It is a species of shark that presented particular features, such as this sharp spine in its flipper. The preservation of this piece is very good, and the strong and well defined longitudinal stretch marks