[D] Brachyceratops montanensis [Su] [jG] [dG]
Cretaceous Late Campanian Maastrichtian
Ornithischia Genasauria Cerapoda Marginocephalia Ceratopia Neoceratopia Ceratopidae Centrosaurinae Nomina Dubia
Two Medicine Formation, along the Milk River, Montana, US
Rubeosaurus ovatus (McDonald & Horner 2010) > Styracosaurus ovatus (Gilmore, 1930) > Brachyceratops montanensis (Gilmore, 1914)
6 partial skulls, skeletons, subadult.
USNM 7951. Collected in August 1913. The original description was by Gilmore in the Smithsonian Miscellaneous Collections, volume 63, in 1914. The type specimen consist of a partial skull and frill. In 1995 this genus was referred to Styracosaurus by Scott Sampson . It is now considered to be a juvenile Styracosaurus.
However, Dodson, Forster and Sampson in The Dinosauria II Chapter 23 \\\\\\\"Ceratopsidae\\\\\\\" page 508 state refering to Sampson, 1997 that this specimen should be regarded as a Nomen Dubium since it is based on juvenile remains that had not expressed adult features at the time of death.