Genasauria

Belongs within: Dinosauria.Contains: Stegosauria, Ankylosauria, Ornithopoda, Pachycephalosauria, Ceratopsia. The Genasauria are a major clade of herbivorous dinosaurs that have been defined as uniting the Thyreophora (armoured dinosaurs), Ornithopoda and Marginocephalia (pachycephalosaurs and ceratopsians). All Ornithischia surviving after the early Jurassic are members of this clade. Basal genasaurs include Lesothosaurus diagnosticus, a lightly built bipedal species… Continue reading Genasauria

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Ankylosauria

Belongs within: Genasauria.Contains: Ankylosauridae, Edmontoniinae. The Ankylosauria is a clade of more or less heavily armoured, quadrupedal, herbivorous dinosaurs that has been defined as including all taxa closer to Ankylosaurus than Stegosaurus. Most classifications of ankylosaurs have recognised the families Nodosauridae, with relatively slender snouts, and Ankylosauridae, with broader snouts and often with a large… Continue reading Ankylosauria

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Stegosauria

Belongs within: Genasauria. The Stegosauria are a group of quadrupedal herbivorous dinosaurs known from the Middle Jurassic to the Lower Cretaceous, members of which bore a characteristic armature of dorsal vertical plates (Galton & Upchurch 2004). The largest and best known stegosaur is Stegosaurus from the Late Jurassic of North America, some examples of which… Continue reading Stegosauria

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Ornithopoda

Belongs within: Genasauria.Contains: Iguanodontia. The Ornithopoda is a clade of bipedal and facultatively quadrupedal herbivorous dinosaurs that has been defined as including all taxa closer to Edmontosaurus than to Triceratops (Norman et al. 2004). The composition of this clade is currently subject to revision; recent phylogenetic analyses have found that several taxa previously regarded as… Continue reading Ornithopoda

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Ankylosaurinae

Belongs within: Ankylosauridae. The Ankylosaurinae is a clade of ankylosaurs from the Late Cretaceous of Asia and North America that has been defined as including all taxa closer to Ankylosaurus than Shamosaurus (Vickaryous et al. 2004). Well known members of the group include the North American Euoplocephalus tutus, one of the the largest ankylosaurs reaching… Continue reading Ankylosaurinae

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Hadrosauroidea

Belongs within: Iguanodontia.Contains: Hadrosauridae. The name Hadrosauroidea has been used for a clade uniting the Hadrosauridae and Ouranosaurus; it is here used for the smallest clade uniting these two taxa as found in the phylogenetic analysis by Norman (2004). Supporting characters for this clade were not explicitly listed. Ouranosaurus nigeriensis was a relatively large ornithopod… Continue reading Hadrosauroidea

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Iguanodontia

Belongs within: Ornithopoda.Contains: Hadrosauroidea. The Iguanodontia are a diverse group of bipedal and facultatively quadrupedal herbivorous dinosaurs known from the Late Jurassic and Cretaceous, recognised by Norman (2004) as the clade of all taxa closer to Edmontosaurus than Thescelosaurus. Characters (from Norman 2004): Premaxilla with transversely expanded and edentulous margin; predentary with smoothly convex rostral… Continue reading Iguanodontia

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Hadrosaurinae

Belongs within: Hadrosauridae. The Hadrosaurinae are a lineage of hadrosaurid dinosaurs that were mostly crestless, or possessed a solid crest formed from an extension of the nasal bones. The clade as given below is supported by the presence of a caudal margin on the circumnarial fossa (Horner et al. 2004). Members of the genus Edmontosaurus… Continue reading Hadrosaurinae

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Hadrosauridae

Belongs within: Hadrosauroidea.Contains: Hadrosaurinae. The Hadrosauridae are a group of large herbivorous dinosaurs known from the Late Cretaceous of Eurasia and North and South America, recognised by Horner et al. (2004) as the least inclusive clade containing Telmatosaurus and Parasaurolophus. Most hadrosaurids can be divided between the sublineages Hadrosaurinae and Lambeosaurinae; members of the latter… Continue reading Hadrosauridae

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Ceratopsia

Belongs within: Genasauria.Contains: Ceratopsidae. The Ceratopsia are a group of herbivorous dinosaurs known from the Late Jurassic to Cretaceous of Asia and North America (with some less definite records from other parts of the world). Members of this group are characterised by a novel bone, the rostral bone, at the front of the upper jaw… Continue reading Ceratopsia