[D] Montanoceratops cerorhynchus [Su] [T]
Brown& Schlaikjer, 1942
Cretaceous Late Maastrichtian
Ornithischia Genasauria Cerapoda Marginocephalia Ceratopia Neoceratopia Protoceratopidae
St. Mary River Formation, Montana, US
Typespecies - Skull
Montanoceratops (Sternberg, 1951) > Montanoceratops cerorhynchus (Brown& Schlaikjer, 1942) = Leptoceratops cerorhynchus (Brown& Schlaikjer, 1942)
C.M Sternberg pointed out in proposing a new generic name: \\\\\\\"In almost every respect the Montana species is more advanced than Protoceratops, whereas Leptoceratops is the most primitive of all.\\\\\\\"
An isolated partial well-preserved braincase (AMNH 5244) collected in 1910 from the Horseshoe Canyon Formation, on the east bank of the Red Deer River, in southern Alberta, Canada, was described in detail in 2001 by Makovicky. This specimen preserves the supraoccipital, both opisthotic-exoccipitals, the basioccipital, basisphenoid, both laterophenoids, and parts of the fused parietals. Makovicky\\\\\\\'s analysis positioned Montanoceratops cerrorhynchus as the sister taxon to a Leptoceratops gracilis-Udanoceratops tschizhovi, this new clade given the family name of [Leptoceratopsidae].
AMNH 5464, p artial skull with associated skeleton, second articulated specimen