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Mosasaurus fossils were found in the Seymour Island of Antarctica, which once provided cool temperate waters. Mosasaurus is known from late Maastrichtian deposits in the Antarctic Peninsula, specifically the López de Bertodano Formation in Seymour Island. [92]
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.
The Lewis and Clark Expedition may have discovered the first Mosasaurus fossil in North America. The first possible recorded discovery of a mosasaur in North America was of a partial skeleton described as "a fish" in 1804 by Meriwether Lewis and William Clark's Corps of Discovery during their 1804–1806 expedition across the western United States.
Some mosasaurs measured just a few feet long, while the largest — in the genus Mosasaurus — was nearly 60 feet (18.2 meters) long, and while mosasaur fossils are relatively plentiful ...
Jormungandr was a medium-sized mosasaur, ... Many other fossil animals have been found here which would have likely been contemporaries of Jormungandr.
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]
Mosasaurini is an extinct tribe of mosasaurine mosasaurs who lived during the Late Cretaceous and whose fossils have been found in North America, South America, Europe, Africa and Oceania, with questionable occurrences in Asia.
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 ...