Named By: Nowinski - 1971.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Sauropodomorpha, Sauropoda, Titanosauria, Nemegtosauridae.
Species: N. mongoliensis (type).
Size: Uncertain due to incomplete fossil material.
Known locations: Mongolia - Nemegt Formation.
Time period: Campanian to Maastrichtian of the Cretaceous.
Fossil representation: Partial skull.
known from only a single partial skull, Nemegtosaurus
is quite a find
as titanosaurids are often only known from post cranial remains.
However another titanosaurid called Opisthocoelicaudia
is also known
from the same Formation as Nemegtosaurus, and this
one is only known
from post cranial remains. This has led some to question if
Nemegtosaurus is actually the missing head of
The skull of Nemegtosaurusis has a light build but was preserved with the inclusion of a scleral ring, the bony support for the eye commonly found in archosaurs such as reptiles and birds. Analysis of this scleral ring shows that Nemegtosaurus was cathemeral, meaning that Nemegtosaurus was active for short periods throughout the day.