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The closest is the Dinosaur Genera List, compiled by biological nomenclature expert George Olshevsky, which was first published online in 1995 and was regularly updated until June 2021. [ 1 ] [ 2 ] The most authoritative general source in the field is the second (2004) edition of The Dinosauria .
Hadrosaurids (from Ancient Greek ἁδρός (hadrós) 'stout, thick' and σαύρα (saúra) 'lizard'), or duck-billed dinosaurs, are members of the ornithischian family Hadrosauridae. This group is known as the duck-billed dinosaurs for the flat duck-bill appearance of the bones in their snouts. The ornithopod family, which includes genera ...
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 million years ago) Hell Creek Formation, MT.
Dinosaur classification began in 1842 when Sir Richard Owen placed Iguanodon, Megalosaurus, and Hylaeosaurus in "a distinct tribe or suborder of Saurian Reptiles, for which I would propose the name of Dinosauria ." [ 1] In 1887 and 1888 Harry Seeley divided dinosaurs into the two orders Saurischia and Ornithischia, based on their hip structure ...
Ott & Larson, 2010. Triceratops ( / traɪˈsɛrətɒps / try-SERR-ə-tops; [ 1] lit. 'three-horned face') is a genus of chasmosaurine ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous period, about 68 to 66 million years ago in what is now western North America. It was one of the last-known non-avian ...
2006. Adamantina Formation ( Late Cretaceous, Turonian to Maastrichtian ) Brazil. Derived for a titanosaur as indicated by the ball-and-socket articulations of its caudal vertebrae. Adeopapposaurus. 2009. Cañón del Colorado Formation ( Early Jurassic, Hettangian to Pliensbachian ) Argentina. May have had a keratinous beak based on the shape ...
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