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Mosasauroidea is a superfamily of extinct marine lizards that existed during the Late Cretaceous.Basal members of this group consist of small semiaquatic forms with terrestrial limbs ("plesiopedal"), while laters members include larger fully aquatic paddle-limbed ("hydropedal") forms commonly known as mosasaurs. [3]
[20] The validity of Pythonomorpha is still debated; there is no consensus about the relationships of snakes or mosasaurs to each other, or to the rest of the lizards. An analysis by Conrad (2008) placed mosasaurs with varanoid lizards, [ citation needed ] and snakes with skinks , while an analysis by Gauthier, et al., (2012) suggested that ...
Carsosaurus is a genus of extinct amphibious reptiles, in the mosasaur superfamily, containing only the species Carsosaurus marchesetti.It is known from a single individual from the Komen Limestone of Slovenia.
The outline of the dorsal surface of the premaxilla is narrow and pointed forward, similar to Mosasaurus and Plesiotylosaurus. The maxilla is long and thin. Feeder foramina line the lateral surface of the maxilla and enlarge posteriorly. These foramina are located about 2 cm (0.79 in) behind the row of teeth of the maxillae. [1]
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.
The team initially suspected the specimen to be the oldest known Mosasaurus, but further preparation uncovered features indicating a new intermediate genus and species between Mosasaurus and the more primitive Clidastes. [1] The study, published in 2023, named the species Jormungandr walhallaensis.
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.
Clidastes was the one of the smallest of the mosasaurs (the smallest known being Dallasaurus), averaging 2–4 meters (6.6–13.1 ft) in length, with the largest specimens reaching 6.2 meters (20 feet) long. [4]