Brachyceratops is regarded as a highly dubious genus of ceratopsian dinosaur that may represent the juvenile form of another already named genus, and indeed one specimen of Brachyceratops (USNM 14765, a sub adult referred to the original five juveniles) has already been moved to the Rubeosaurus genus. This would normally raise speculation that Rubeosaurus might be a junior synonym to Brachyceratops since the former genus was named in 2010. However, because the five juveniles of Brachyceratops do not have any clearly identifiable features because these would not develop until adulthood, they cannot be held as being diagnostic of a genus. Therefore, not only can the Brachyceratops juveniles not have seniority over Rubeosaurus, but Brachyceratops has to be treated as a dubious genus because adults would look very different from them and could not be positively assigned. The only thing that can be said about Brachyceratops with confidence is that the genus belongs within the Centrosaurinae, the group of ceratopsians noted for having smaller neck frills but more developed horns.
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