or lower Tertiary formation containing fossils of Dinosaurs and Mosasaurs, and in the museum of the university of Montana is the greater part of the skeleton of a Dinosaur which was found here.
Thus the analysis of George Baur of the ancestral form of the lizards, mosasaurs, dinosaurs, crocodiles and phytosaurs led both to the generalized Palaeohatteria of the Permian and indirectly to the surviving Tuatera lizard of New Zealand.
Among marine Mesozoic reptiles, each of the groups broadly known as ichthyosaurs, plesiosaurs, mosasaurs and crocodiles were polyphyletic in a marked degree.
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