Temporal range: Late Cretaceous, 75 Ma
|Cast of the type specimen, Canadian Museum of Nature|
Sampson et al., 2010
(Holmes et al., 2001 [originally Chasmosaurus])
Vagaceratops (meaning "wandering (vagus, Latin) horned face", in reference to its close relationship with Kosmoceratops from Utah) is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period (late Campanian) in what is now Alberta. Its fossils have been recovered from the Upper Dinosaur Park Formation.
Vagaceratops is characterized by a short nose horn and brow horns that are reduced to low bosses. The frill is distinctive in being square shaped, with a row of ten, forward-curving hornlets along the back. The genus was named by Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine A. Forster, Joshua A. Smith, and Alan L. Titus in 2010, and the type species is Vagaceratops irvinensis. This species was originally described as a species of Chasmosaurus (C. irvinensis) in 2001. Its relationships remain debated. Vagaceratops has variously been allied with Kosmoceratops or with Chasmosaurus.
- Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine A. Forster, Joshua A. Smith, and Alan L. Titus (2010). "New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism". PLoS ONE. 5 (9): e12292. doi:10.1371/journal.pone.0012292. PMC . PMID 20877459.
- R. B. Holmes, C. A. Forster, M. J. Ryan and K. M. Shepherd (2001). "A new species of Chasmosaurus (Dinosauria: Ceratopsia) from the Dinosaur Park Formation of southern Alberta". Canadian Journal of Earth Sciences. 38: 1423–1438. doi:10.1139/cjes-38-10-1423.
- Longrich, N.R., 2011. Titanoceratops ouranos, a giant horned dinosaur from the Late Campanian of New Mexico. Cretaceous Research 32, 264-276.
- Vagaceratops irvinensis at the Canadian Museum of Nature
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