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Mosasaurus fossils have been found in North and South America, Europe, Africa, Western Asia, and Antarctica. This distribution encompassed a wide range of oceanic climates including tropical, subtropical, temperate, and subpolar. Mosasaurus was a common large predator in these oceans and was positioned at the top of the food chain.
The smaller mosasaurs may have spent some time in fresh water, hunting for food. The largest mosasaur Mosasaurus hoffmannii was the apex predator of the Late Cretaceous oceans, reaching more than 11 metres (36 ft) in length and weighing up to 10 metric tons (11 short tons) in body mass. [14]
Street, H. P. (2016) A re-assessment of the genus Mosasaurus (Squamata: Mosasauridae) (PhD), University of Alberta Lingham-Soliar, T. (1995). "Anatomy and Functional Morphology of the Largest Marine Reptile Known, Mosasaurus hoffmanni (Mosasauridae, Reptilia) from the Upper Cretaceous, Upper Maastrichtian of the Netherlands".
The genus contains a single species, J. walhallaensis, known from a nearly-complete skull and partial skeleton. Jormungandr was a medium-sized mosasaur, at around 6–8 metres (20–26 ft) long, and its skeletal anatomy exhibits a mix of features seen in both basal and derived mosasaurines.
Skeleton of Clidastes liodontus mounted as if pursuing a fossil sea turtle. Russell (1967, pp. 123–124) [6] defined the Mosasaurinae as differing from all other mosasaurs as follows: "Small rostrum present or absent anterior to premaxillary teeth. Fourteen or more teeth present in dentary and maxilla. Cranial nerves X, XI, and XII leave ...
Tylosaurus proriger mounted skeleton in the Rocky Mountain Dinosaur Resource Center in Woodland Park, Colorado. This list of mosasaurs is a comprehensive listing of all genera that have ever been included in the family Mosasauridae or the parent clade Mosasauroidea, excluding purely vernacular terms.
This is a list of stratigraphic units from which mosasaur body fossils have been recovered. Units listed are all either formation rank or higher (e.g. group). Units listed are all either formation rank or higher (e.g. group).
Looking at the Mauriciosaurus diagram, the only derivative part appears to be the leatherback sea turtle comparison at the top right corner. I can probably remove that (and the text indicating it) if fishboy is fine with it. As for Brancasaurus, the skeletal structure and proportions appear to be consistent between the reconstructions. "Neck ...