[D] Bainoceratops efremovi [sG] [T]
Tereschenko & Alifanov, 2003
Ornithischia Genasauria Cerapoda Marginocephalia Ceratopia Neoceratopia Protoceratopidae
Djadochta Formation, Bayn Dzak, Mongolia
Genus - Typespecies
The horned dinosaur, Bainoceratops efremovi gen. et sp. nov., is described on the basis of vertebral series. The new form is distinguished from Protoceratops andrewsi (Granger & Gregory, 1923) which is typical of Djadokhta deposits , by vertebral morphology and shows close relationships to Udanoceratops tschizhovi (Kurzanov, 1922) and Leptoceratops gracilis (Brown, 1914) in the following characters.
The cranial surfaces of the centra of the presacral vertebrae are concave, while the caudal surfaces are flat. The diapophyses of the ninth dorsal vertebra are round in cross section, and the interprezygapophyseal spaces in this and the next vertebra are narrow. The synapophyseal facets of the poste- riormost dorsal vertebra are sculptured.