Offered is a very good Mosasaurus jaw of the species Halisaurus arambourgi. Exposed is the inner side of the left lower jaw. The fossil is 100% original and is still in the original plaster field jacket. All teeth belong to the jaw and are not glued back in. There are even some small unerupted teeth visible in the lower corners of some teeth, as can be seen in the last pictures. These unerupted teeth were prepped out by myself. All teeth (also the unerupted ones) have a thin distinctive black line running along the ridge of the teeth, which again indicates that all teeth belong to the same animal. Note that it is very difficult to find good quality mosasaur jaws with only orignal teeth that belong to the jaw like this one. Species: Mosasaurus - Halisaurus arambourgi Fossil location: Oued Zem, Khouribga, Morocco Time period: Upper Cretaceous, 66 - 72.1 Milion years old Jaw length: 28 cm The item will be well packed and shipped with insurance.