20755 - Top Quality 1.54 Inch Rooted Halisaurus walkeri (Mosasaur) Tooth Cretaceous Walliserops Sister taxon: Mariopteris

Sister taxon: Mariopteris

Orthoceras progressum

Zittel 1883 (ray-finned fish)

• Devonian of Algeria (1)

It is not easy to find this type of pieces in these sites due to the destructive metholodology of many local miners

20755 - Top Quality 1.54 Inch Rooted Halisaurus walkeri (Mosasaur) Tooth Cretaceous Walliserops Sister taxon: MariopterisIn the international market is very common to find Mosasaurus rests coming from the phosphate quarries of the Upper Cretaceous of the Ouled Abdoun Basin (Morocco). This quarries have been exploited since the beginning of the past century. Many sellers that sell this fossils do not make a good precise taxonomic identification work. In these sites there are numerous different species of Mosasaurus described in the enormous assemblage of giant marine