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Protoceratops were small ceratopsians, up to 2–2.5 m (6.6–8.2 ft) long and around 62–104 kg (137–229 lb) in body mass. While adults were largely quadrupedal, juveniles had the capacity to walk around bipedally if necessary. They were characterized by a proportionally large skull, short and stiff neck, and neck frill.
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 ...
In 2019 a partial skeleton (specimen KID 196) of Bagaceratops was described by Bitnara Kim and colleagues, who noted no significant differences between the skeleton of Protoceratops and the former, with the exception of the anatomy of the skull and the shape and location of the clavicles. This specimen was discovered in 2007 also from the ...
Size comparison with human. Zuniceratops was a relatively small ceratopsian, measuring about 2.2 meters (7.2 ft) long and weighing around 175 kilograms (386 lb). [7] The basal skull length is estimated up to 40 centimetres (1.3 ft). [6]
Velociraptor (/ vəˌlɒsɪˈræptər, vəˈlɒsɪræptər /; [1] lit. 'swift thief') is a genus of small dromaeosaurid dinosaurs that lived in Asia during the Late Cretaceous epoch, about 75 million to 71 million years ago. Two species are currently recognized, although others have been assigned in the past.
Albertaceratops is known from a single complete skull (TMP.2001.26.1) found in August 2001 and skull and postcranial fragments. A phylogenetic analysis carried out by its describer, Michael J. Ryan, found it to be the most basal centrosaurine. [1] Additional specimens were reported from a bonebed in the Judith River Formation of Montana, which ...
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.
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 ...