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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.
Jormungandr is a large mosasaur. The holotype skull measures 72 centimeters (28 in) in total length and the lower jaw is 80.8 centimeters (31.8 in) long. [2] Based on these measurements, Zietlow and colleagues estimated a total body length of 5.4–7.3 meters (18–24 ft). [3] [4] Size of Jormungandr compared to a human
A mix of features in the bones of its skull made it unexpectedly challenging for the scientists to classify the newcomer and hinted that the mosasaur group includes more diverse forms than ...
The Mosasaurus hoffmannii skull found in Maastricht between 1770 and 1774. The first publicized discovery of a partial fossil mosasaur skull in 1764 by quarry workers in a subterranean gallery of a limestone quarry in Mount Saint Peter, near the Dutch city of Maastricht, preceded any major dinosaur fossil discoveries, but remained little known.
MNHN 9587 was originally assessed as 'Ichtyosaurus missouriensis', [7] while RFWUIP 1327 was described as 'Mosasaurus maximiliani'. [8] Later both specimens were confirmed to belong to the same individual and the species name was established. Skull of Mosasaurus missouriensis holotype RFWUIP 1327 with a cast of MNHN 9587. Sarabosaurus dahli ...
Megapterygius is a medium-sized mosasaur with an estimated skull length of 0.8 metres (2.6 ft) and a body length of approximately 6 metres (20 ft). Both the front and hind flippers are longer than the skull. This feature is not seen in any other mosasauroid with paddle-like limbs.
Annotated schematic of a mosasaur skull. Like all prognathodontines, the skull of Thalassotitan is blunt and robust. The premaxilla, the bone bearing the tip of the skull, is very short in a lateral view but broad and convex when viewed dorsally.
Named S. johnsoni after its discoverer, the skull is one of the most complete mosasaur skulls recovered and thus provides new anatomical information for Selmasaurus, a better understanding of plioplatecarpine ingroup relationships, extends the geographic and temporal range of the genus, and documents further diversity within Plioplatecarpinae.