The Giving of December. Nemegtosaurus

  Although 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 Opisthocoelicaudia.
       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.