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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.
There is no evidence for live birth in Mosasaurus itself, but it is known in a number of other mosasaurs; [105] examples include a skeleton of a pregnant Carsosaurus, [105] a Plioplatecarpus fossil associated with fossils of two mosasaur embryos, [106] and fossils of newborn Clidastes from pelagic (open ocean) deposits. [105]
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
Bell proposed that the Mosasaurini should be abandoned and that all members of the tribe should be incorporated into the Plotosaurini. While other scientists agree that a tribe containing Mosasaurus should be monophyletic, they argue that Mosasaurini should be the valid tribe. For example, in a 2012 study, Aaron LeBlanc, Caldwell, and Bardet ...
Xenodens (from Greek and Latin for "strange tooth") is a potentially dubious extinct genus of marine lizard belonging to the mosasaur family. It contains a single species, X. calminechari (From Arabic کالمنشار, meaning "like a saw"), which is known from Late Maastrichtian phosphate deposits in the Ouled Abdoun Basin, Morocco. [1]
The described fossils were of a tooth and jaw fragment recovered from a marl pit from Monmouth County, New Jersey, which Mitchell described as "a lizard monster or saurian animal resembling the famous fossil reptile of Maestricht", implying that the fossils had affinities with the then-unnamed M. hoffmannii holotype from Maastricht.
Scientists said this ichthyosaur lived 205 million years ago and dominated the oceans just as dinosaurs were becoming masters on land.
It is the second documented discovery of mosasauroid fossils and was found between the 1770s and early 1780s. [3] [4] It was brought to Paris after the siege of Maastricht, where it was studied by Cuvier. [4] Mosasaurus missouriensis: Mosasaurus: The Goldfuss Mosasaur MNHN 9587/RFWUIP 1327 Muséum national d'Histoire Naturelle/Goldfuß Museum ...