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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: Unescoceratops
Species: U. koppelhusae

Unescoceratops Ryan, Evans, Currie, Brown & Brinkman, 2012
Primary references

Ryan, M.J. et al. 2012: New leptoceratopsids from the Upper Cretaceous of Alberta, Canada. Cretaceous research, 35: 69–80. DOI: 10.1016/j.cretres.2011.11.018

Unescoceratops is a genus of leptoceratopsid ceratopsian dinosaurs known from the Late Cretaceous of Alberta, southern Canada. It contains a single species, Unescoceratops koppelhusae.[1]

Unescoceratops is known only from the holotype specimen TMP 95.12.6, a partial left dentary. The fossil was collected in 1995 in the Black Coulee locality (formerly Deadhorse Coulee), near the Writing-on-Stone Provincial Park, from the Dinosaur Park Formation, dating to the late Campanian stage of the Late Cretaceous period, about 76.5-75 million years ago. The specimen was regarded as too incomplete to identify, and was shelved for several years. It was believed to be a Leptoceratops specimen at the time. A cladistic analysis done by Michael Ryan (of The Cleveland Museum of Natural History) and David Evans (of the Royal Ontario Museum) found it to be among the most advanced leptoceratopsid genera.[1][2][3]

Unescoceratops is thought to have been between one and two meters long and less than 91 kilograms. Its teeth were the roundest of all leptoceratopsids.[3]

Mallon et al. (2013) examined herbivore coexistence on the island continent of Laramidia, during the Late Cretaceous. It was concluded that small ornithischians like Unescoceratops were generally restricted to feeding on vegetation at, or below the height of 1 meter.[4]

The genus Unescoceratops was first described by Michael J. Ryan, David C. Evans, Philip J. Currie, Caleb M. Brown and Don Brinkman in 2012 (though it had been published earlier by Ryan and Currie in 1995 with no name) and the type species is Unescoceratops koppelhusae.[1] The name means "UNESCO's ceratopsian" (ceratopsian means "one with a horned face"). The name is meant to honor UNESCO's efforts to increase understanding of natural history sites around the world. "Dinosaurprovincialparkaceratops was too long," explained Ryan.[2] The specific epithet is named after Currie's wife, palynologist Eva Koppelhus.[4]

Unescoceratops has been classified as a leptoceratopsid and the sister taxa to Gryphoceratops,[1] which was described in the same paper.[5] These two are the most derived leptoceratopsids known, despite Gryphoceratops also being the oldest leptoceratopsid.[1]

The cladogram below represents the cladistic relationship of Unescoceratops compared to other leptoceratopsids as reconstructed from the phylogenetic analysis.[1]



Montanoceratops Montanoceratops BW flipped.jpg

Ischioceratops Ischioceratops flipped.jpg

Prenoceratops Prenoceratops BW.jpg

Leptoceratops Leptoceratops BW.jpg

Udanoceratops Udanoceratops Restoration.png




See also

Dinosaurs portal

Timeline of ceratopsian research


Ryan, Michael J.; Evans, David C.; Currie, Philip J.; Brown, Caleb M.; Brinkman, Don (2012). "New leptoceratopsids from the Upper Cretaceous of Alberta, Canada". Cretaceous Research. 35: 69–80. doi:10.1016/j.cretres.2011.11.018.
Ryan, Michael (2012). New horned dinosarus named (SWF) (YouTube video). Cleveland: Cleveland Museum of Natural History. Retrieved 30 Mar 2012.
Brown, Mark. "Two new dinosaur species fill in evolutionary gaps". Wired. Retrieved 7 April 2012.
Mallon, Jordan C; Evans, David C.; Ryan, Michael J.; Anderson, Jason S. (2013). "Feeding height stratification among the herbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada". BMC Ecology. 13: 14. doi:10.1186/1472-6785-13-14. PMC 3637170. PMID 23557203.
"Two New Species of Horned Dinosaurs Identified | Paleontology |". Breaking Science News | Retrieved 2022-01-20.


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