Vagaceratops

Vagaceratops
Temporal range: Late Cretaceous, 75 Ma
↓
Cast of the type specimen, Canadian Museum of Nature
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauria
Order:†Ornithischia
Family:†Ceratopsidae
Subfamily:†Chasmosaurinae
Genus:†Vagaceratops
Sampson et al., 2010
Species: †V. irvinensis
Binomial name
Vagaceratops irvinensis
(Holmes et al., 2001 [originally Chasmosaurus])
Synonyms

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.[1]

Classification

Life restoration
Restored skeleton
Model, Canadian Museum of Nature

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.[1] This species was originally described as a species of Chasmosaurus (C. irvinensis) in 2001.[2] Its relationships remain debated. Vagaceratops has variously been allied with Kosmoceratops[1] or with Chasmosaurus.[3][2]

The cladogram below is the phylogeny of the Chasmosaurinae by Brown et al (2015):[4]

Ceratopsidae

 

Centrosaurinae

 
Chasmosaurinae

 

 

Vagaceratops irvinensis

 
 

Kosmoceratops richardsoni

 
 
 

 

 

 

 

 

 

Chasmosaurus belli

 
 

Chasmosaurus russeli

 
 
 

Mojoceratops perifania

 
 
 

Agujaceratops mariscalensis

 
 
 

 

Utahceratops gettyi

 
 

Pentaceratops sternbergii

 
 
 
 

 

Bravoceratops polyphemus

 
 

Coahuilaceratops magnacuerna

 
 
 
 

 

 

Anchiceratops ornatus

 
 

Arrhinoceratops brachyops

 
 
Triceratopsini

 

Regaliceratops peterhewsi

 
 

Eotriceratops xerinsularis

 
 

Ojoceratops fowleri

 
 

 

Titanoceratops ouranos

 
 

 

Nedoceratops hatcheri

 
 

 

 

Torosaurus latus

 
 

Torosaurus utahensis

 
 
 

 

Triceratops horridus

 
 

Triceratops prorsus

 
 
 
 
 
 
 
 
 
 

See also

References

  1. 1 2 3 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 2929175. PMID 20877459.
  2. 1 2 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.
  3. ↑ Longrich, N.R., 2011. Titanoceratops ouranos, a giant horned dinosaur from the Late Campanian of New Mexico. Cretaceous Research 32, 264-276.
  4. ↑ Brown, Caleb M.; Henderson, Donald M. (June 4, 2015). "A new horned dinosaur reveals convergent evolution in cranial ornamentation in ceratopsidae". Current Biology. 25 (online): 1641–8. doi:10.1016/j.cub.2015.04.041. PMID 26051892.


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