Nemegtosaurus (Nemegt lizard)

Short Info

Nemegtosaurus (Nemegt lizard)

Phonetic : Neh-meg-toe-sore-us.

Named By : Nowinski – 1971

Diet : Herbivore

Size : Estimated 13 meters long

Type of Dinosaur : Sauropod

Type Species : N. mongoliensis (type)

Found in : Mongolia – Nemegt Formation

When it Lived : Late Cretaceous, 72-68 million years ago

Nemegtosaurus, which means “Reptile From the Nemegt”, was a sauropod dinosaur that lived in the Late Cretaceous Period of Mongolia. The Nemegt Basin, in the Gobi Desert where one skull was found, is the place that Nemegtosaurus was given its name. In its long, low skull and pencil-shaped teeth, it resembles diplodocoids. Recent research has revealed that Nemegtosaurus was actually a titanosaur. It is closely related to animals like Rapetosaurus, Alamosaurus, and Saltasaurus.


Opisthocoelicaudia Museum of Evolution in Warsaw 14Adrian Grycuk, CC BY-SA 3.0 PL, via Wikimedia Commons


Nemegtosaurus’ skull is derived from the same bed as Opisthocoelicaudia the titanosaur Opisthocoelicaudia. This titanosaur was known from a skull and neckless skeleton. Initial research suggested that Nemegtosaurus and Opisthocoelicaudia were two different species. These genera both represent titanosaurians advanced, but it is possible that they are the same animal. The possibility that Opisthocoelicauda could be a junior synonym has been raised by the relocation of the Nemegtosaurus type location in Central Sayr. Consequently, Opisthocoelicaudiinae would be a junior synonym of Nemegtosauridae.

On the basis ZPAL MgD/I/9, Nowinski first described the type species Nemegtosaurus Mongoliensis in 1971. Dong described N. pachi in 1977 based on the teeth IVPP V.4879. However, it is a nomen dualium.

Alexander O. Averianov, Alexey V. L. Lopatin, reported that Nemegt sauropod verbrae were discovered in 1949, as well as some femora. They stated that they likely belonged to Nemegtosaurus and that this supports the fact that the two genera are distinct.

Source: Wikipedia