Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: †Ornithischia
Cladus: †Genasauria
Cladus: †Neornithischia
Cladus: †Cerapoda
Cladus: †Marginocephalia
Subordo: †Ceratopsia
Cladus: †Neoceratopsia
Familia: †Leptoceratopsidae
Genus: †Gryphoceratops
Species: G. morrisoni
Name
Gryphoceratops Ryan, Evans, Currie, Brown & Brinkman, 2012
Type species: Gryphoceratops morrisoni Ryan, Evans, Currie, Brown & Brinkman, 2012
References
Ryan, M.J., D.C. Evans, P.J. Currie, C.M. Brown, and D. Brinkman. 2012: New leptoceratopsids from the Upper Cretaceous of Alberta, Canada. Cretaceous Research, 35(1): 69–80. DOI: 10.1016/j.cretres.2011.11.018.
Gryphoceratops is an extinct genus of leptoceratopsid ceratopsian dinosaur known from the Late Cretaceous of Alberta, southern Canada.[1]
Discovery
Gryphoceratops is known only from the holotype ROM 56635, a partial right dentary. The holotype was collected in the northwest corner of Dinosaur Provincial Park, from bonebed 55 of the Milk River Formation, dating to the late Santonian stage of the middle Late Cretaceous period, about 83.5 million years ago. Thus, Gryphoceratops represents the oldest known leptoceratopsid. However, a cladistic analysis found it to be one of the most advanced leptoceratopsids. Additionally, the holotype probably represents the smallest adult ceratopsian known from North America.[1]
The cladogram below represents the cladistic relationship of Gryphoceratops compared to other leptoceratopsids.[1]
| Leptoceratopsidae |
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Etymology
Gryphoceratops was first named by Michael J. Ryan, David C. Evans, Philip J. Currie, Caleb M. Brown and Don Brinkman in 2012 and the type species is Gryphoceratops morrisoni. The genus name means "griffin horned face", as a reference to the beaked head, and the species name honors Ian Morrison, who prepared the holotype specimen.[1]
See also
Dinosaurs portal
Timeline of ceratopsian research
References
Michael J. Ryan; David C. Evans; Philip J. Currie; Caleb M. Brown; Don Brinkman (2012). "New leptoceratopsids from the Upper Cretaceous of Alberta, Canada". Cretaceous Research. 35: 69–80. doi:10.1016/j.cretres.2011.11.018.
