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Monoclonius crassus Cope 1876 (ceratopsid)

Reptilia - Neornithischia - Ceratopsidae

PaleoDB taxon number: 54486

Synonym: Monoclonius lowei Sternberg 1940 (taxon 66021)

Full reference: E. D. Cope. 1876. Descriptions of some vertebrate remains from the Fort Union Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:248-261

Belongs to Monoclonius according to P. Dodson et al. 2004

Sister taxa: Monoclonius fissus, Monoclonius recurvicornis, Monoclonius sphenocerus

Type specimens:

  • Monoclonius crassus: AMNH 3998, a skull. Its type locality is mouth of Dog Creek, which is in a Campanian terrestrial lignite/sandstone in the Judith River Formation of Montana.
  • Monoclonius lowei: NMC 8790, a skull.

Ecology: ground dwelling herbivore

Average measurements (in mm): coracoid length 110.0, femur length 643.0, fibula length 533.4, humerus length 600.0, radius length 350.0, scapula length 700.0, skull length 760.0, tibia length 600.0, ulna length 450.0

Estimated body mass: 1.11 tons based on femur length