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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). Formations are listed by continent, and alphabetically within the individual lists.
Instead, they primarily relied on stratigraphic associations and Cuvier's 1808 research on the holotype skull. Thus, in-depth research on the placement of Mosasaurus was not undertaken until the discovery of more complete mosasaur fossils during the late 19th century, which reignited research on the placement of mosasaurs among squamates. [8]
Mosasaurus was a type of derived mosasaur, or a latecoming member with advanced evolutionary traits such as a fully aquatic lifestyle. As such, it had a streamlined body, an elongated tail ending with a downturn supporting a two-lobed fin, and two pairs of flippers.
"Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries". Journal of Vertebrate Paleontology .
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
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.
His findings remained largely ignored until more complete North American mosasaur fossils were discovered during the 1870s. Historically, the type species M. hoffmannii was described via unclear diagnosis, leading the genus to become a wastebasket taxon containing up to fifty different species.
A Unique Sacroiliac Contact in Mosasaurs (Sauria, Varanoidea, Mosasauridae). Journal of Vertebrate Paleontology, 6, 2, 197–199. Kiernan, C. R. (January 1, 2002). Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries.