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Protoceratops (/ ˌproʊtoʊˈsɛrətɒps /; lit. 'first horned face') [1] is a genus of small protoceratopsid dinosaurs that lived in Asia during the Late Cretaceous, around 75 to 71 million years ago. The genus Protoceratops includes two species: P. andrewsi and the larger P. hellenikorhinus.
Protoceratops skull with large sclerotic rings. Based on the size of its sclerotic ring, Protoceratops had an unusually large eye among protoceratopsids. In birds, a medium-sized sclerotic ring indicates that the animal is a predator, a large sclerotic ring indicates that it is nocturnal, and the largest ring size indicates it is a nocturnal ...
Breviceratops had a skull combining primitive and derived traits, such as premaxillary teeth (also shared with Protoceratops andrewsi) and an antorbital fenestra (also shared with Bagaceratops), which is an opening of the maxilla located in front of the eye socket. This fenestra was distinct from Bagaceratops in that it was narrow to straight ...
Timeline of ceratopsian research. This timeline of ceratopsian research is a chronological listing of events in the history of paleontology focused on the ceratopsians, a group of herbivorous marginocephalian dinosaurs that evolved parrot-like beaks, bony frills, and, later, spectacular horns. The first scientifically documented ceratopsian ...
Fighting Dinosaurs. The Fighting Dinosaurs is a fossil specimen which was found in the Late Cretaceous Djadokhta Formation of Mongolia in 1971. It preserves a Protoceratops andrewsi and Velociraptor mongoliensis trapped in combat about 80 million years ago and provides direct evidence of predatory behavior in non- avian dinosaurs.
Size of Crittendenceratops compared to a human. Crittendenceratops is distinguished by forward-curving, hook-like flanges located along the central portion of the top of the frill, "extensive" epiparietals located along the sides of the parietal portion of the frill, a thickening of the frill in the parietal portion, and a short, pronounced ridge on the surface of the squamosal portion of the ...
Bagaceratops. Bagaceratops (meaning "small-horned face") is a genus of small protoceratopsid dinosaurs that lived in Asia during the Late Cretaceous, around 72 to 71 million years ago. Bagaceratops remains have been reported from the Barun Goyot Formation and Bayan Mandahu Formation. One specimen may argue the possible presence of Bagaceratops ...
Ceratopsia or Ceratopia (/ ˌsɛrəˈtɒpsiə / or / ˌsɛrəˈtoʊpiə /; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Europe, and Asia, during the Cretaceous Period, although ancestral forms lived earlier, in the Jurassic.