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Illustration of specimen YPM 1871E, the horn cores that were erroneously attributed to Bison alticornis, the first named specimen of Triceratops. The first named fossil specimen now attributed to Triceratops is a pair of brow horns attached to a skull roof that were found by George Lyman Cannon near Denver, Colorado, in the spring of 1887. [3]
The remains of a brow horn suggested that the fossil was a large Triceratops, [3] one of the most common dinosaurs found in the Hell Creek Formation. [4] The remains were scattered over an area of 100 square metres. [5] The fossil's excavation was completed by August 2015. [6] The skeleton is over 60% complete, with a skull that is 75% complete ...
Marginocephalia is a clade of ornithischian dinosaurs that includes some of the most well-known Mesozoic animals, such as Triceratops and Pachycephalosaurus. The group is united by, and is named for, the presence of a bony margin formed mostly from the parietal and squamosal bones at the posterior end of the skull.
Marginocephalia (/ ˌ m ɑːr dʒ ə n oʊ s ə ˈ f æ l i ə / Latin: margin-head) is a clade of ornithischian dinosaurs that is characterized by a bony shelf or margin at the back of the skull.
The Triceratops fossil emerged first as it eroded from the rock of the Hell Creek Formation in 2006. The T. rex fossil was then spotted overlapping it. ... an ornate skull with a shieldlike frill, ...
Triceratops: Late Cretaceous (Maastrichtian, 68-66 million years ago) Hell Creek formation: Largest known Triceratops skeleton; 60% complete with a skull that is 75% complete. [18] [19] Sold for €6.6 million (US$7.7 million) on 21 October 2021 [19] [20] Bill BDM Badlands Dinosaur Museum: Triceratops: Late Cretaceous (Maastrichtian, 68-66 ...
A previously unknown species of dinosaur finally has a name five years after the horned specimen’s discovery in Montana: Lokiceratops rangiformis.
A nearly complete and intact dinosaur skeleton has been excavated in France. The specimen is a Titanosaur, one of the largest dinosaurs of its time. 70 million-year-old giant dinosaur skeleton ...