Udanoceratops ‭(‬Udan-Sayr horned face‭)

Short Info

Udanoceratops ‭(‬Udan-Sayr horned face‭)

Phonetic : U-dan-oh-seh-rah-tops.

Named By : Sergei Kurzanov‭ ‬-‭ ‬1992

Diet : Herbivore

Size : Estimated 4 meters long

Type of Dinosaur : Ceratopsian

Type Species : U.‭ ‬tschizhovi‭ (‬type‭)

Found in : Mongolia,‭ ‬Omnogovi Province‭ ‬-‭ ‬Djadokhta Formation,‭ ‬Dornogovi Province‭ ‬-‭ ‬Barun Goyot Formation.

When it Lived : Late Cretaceous, 81-75 million years ago

Udanoceratops (meaning “Udan’s horned face”) is an genus belonging to the huge leptoceratopsid dinosaurs that lived in the Late Cretaceous period of Mongolia and was located in the present known as the Djadokhta Formation.

Udanoceratops was first identified in the work of Russian paleontologist Sergei Kurzanov in 1992 and the species that is most closely related to it was identified as Udanoceratops tschizhovi. The Holotype (PIN 3907/11) was discovered in the 1980s in the Udan Sayr (also spelled Udyn Sayr or Uuden Sair) locality of the Djadokhta Formation in Omnogovi Province that dates back from the Campanian period in the Late Cretaceous period. The generic name derives from the name given to the area in which the holotype is located (Udan Sayr) and Greek ceras/keras which means “horn” and -ops/ops meaning “face”. Udanoceratops is most well-known from the holotype specimen that depicts a huge individual with an enormous, intact skull with sparse bones, including vertebrae.

In 1993, a huge skull (“nearly 1 meters long”) was assigned to Udanoceratops was discovered in the close Bayan Mandahu Formation by paleontologist Tomasz Jerzykiewicz. But, Polish paleontologist Lukasz Czepinski in the year 2020 pointed out that there were no comparable samples to Udanoceratops in these Bayan Mandahu collections, and it is highly likely that the remains were mistaken with the corresponding (and quite massive) Protoceratops hellenikorhinus.

In 2004, Viktor S. Tereschhenko referred an unidentified junior sample (PIN 4046/11) to Udanoceratops aff. Tschizhovi, which is located in the Baga Tariach locality in Dornogovi Province in the Province of Dornogovi, which Tereschhenko believed was part of the Djadokhta Formation. Analyses of geology carried out across fossiliferous locations of the Gobi Desert, published by the Mahito Watabe and colleagues in 2010 indicate that this location is in fact most closely with the Maastrichtian stage Barun Goyot Formation. The classification of this specimen has changed since then, ranging to “Udanoceratops” sp., to?Udanoceratops Sp.

Source: Wikipedia