Rubeosaurus belongs to the family of Ceratopsian dinosaur which had been found existed in the Campanian age of the Cretaceous period, over 74.6 million years ago. The fossil remains of the dinosaur were recovered in USA, Montana - strata of the upper Two Medicine Formation. This herbivore species comes under the classification of Chordata, Reptilia, Dinosauria, Ornithischian, Ceratopsia, Ceratopsidae, Centrosaurinae, Pachyrhinosaurini.
The species was named by Andrew T. McDonald & John R. Horner in 2010. The preserved holotype, USNM 11869 is the known part of collection of this species which included partial skull elements of two individuals consisting of a left premaxilla, nasals and postorbital with horncore. The skeletal structure, length and weight of Rubeosaurus still remain unpredicted due to the incomplete remains.
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