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The Triceratops holotype, YPM 1820, was collected in 1888 from the Lance Formation of Wyoming by fossil hunter John Bell Hatcher, but Marsh initially described this specimen as another species of Ceratops. [13] Cowboy Edmund B. Wilson had been startled by the sight of a monstrous skull poking out of the side of a ravine.
The strut between this opening and the nostril was narrow in side view and transversely thickened with a straight rear edge. The processes jutting into the nostrils had hollow outer sides but were far less excavated and much higher than with Triceratops or Torosaurus. The maxilla bore at least thirty-five tooth positions. The nasal horn was low ...
Exposed on the inner side of the latter, it sits in front of the articular and above the angular. It forms the inner margin of the adductor fossa. [5] prefrontal The prefrontal is a smaller bone on the side margin of the skull roof between the frontal, lacrimal, and nasal. [25]: 38 predentary
Temporal fenestrae in relation to the other skull openings in the dinosaur Massospondylus, a type of diapsid. The supratemporal fenestra, also called the upper temporal fenestra, is positioned above the other fenestra and is exposed primarily in dorsal (top) view. In some reptiles, particularly dinosaurs, the parts of the skull roof lying ...
Frill-necked lizard showing its neck frills Skull of Triceratops with its large neck frill. A neck frill is the relatively extensive margin seen on the back of the heads of reptiles with either a bony support such as those present on the skulls of dinosaurs of the suborder Marginocephalia or a cartilaginous one as in the frill-necked lizard.
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 ...
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.
The direct association of the drawings with dinosaur fossil tracks is unique and may shed more light on rock art importance, meaning and significance, according to Radosław Palonka, an associate ...