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The clade Ceratopsidae was in 1998 defined by Paul Sereno as the group including the last common ancestor of Pachyrhinosaurus and Triceratops; and all its descendants. [17] In 2004, it was by Peter Dodson defined to include Triceratops , Centrosaurus , and all descendants of their most recent common ancestor. [ 18 ]
In both clades, the forelimbs were much shorter than the hindlimbs, particularly in stegosaurs. Thyreophora has been defined as the group consisting of all species more closely related to Ankylosaurus and Stegosaurus than to Iguanodon and Triceratops. It is the sister group of Cerapoda within Genasauria. [2]
Stegosaurus longispinus was named by Charles W. Gilmore in 1914 based on a fragmentary postcranial skeleton that has largely been lost. [61] [8] It is now the type species of the genus Alcovasaurus, though it has been referred to Miragaia. [62] [61] Stegosaurus madagascariensis from Madagascar is known solely from teeth and was described by ...
Stygimoloch, Stegosaurus, Euoplocephalus, Tyrannosaurus rex/Triceratops, Tyrannosaurus rex Dino Dent: Dan recruits Angie to help him find the dinosaur that dented a school bus. Active Imagination: During a meeting in the park, Dan struggles to understand why despite being a larger opponent, the T-rex backs down from a Triceratops. Dromaeosaurus 10
The most derived species, like Stegosaurus, Hesperosaurus and Wuerhosaurus, have very large and flat back plates. Stegosaurid plates have a thick base and central portion, but are transversely thin elsewhere. The plates become remarkably large and thin in Stegosaurus. They are found in varying sizes along the dorsum, with the central region of ...
Other dinosaurs included in the book are a Triceratops, a Saurolophus, an Apatosaurus, a Stegosaurus, and a Dryosaurus, with the only exception being the Pteranodon, a pterosaur. A sequel book was later published, Going Hollywood! A Dinosaur's Dream [3] and Your Pet Dinosaur: An Owner's Manual. [4]
Dinosauromorpha is a clade of avemetatarsalians (archosaurs closer to birds than to crocodilians) that includes the Dinosauria (dinosaurs) and some of their close relatives. It was originally defined to include dinosauriforms and lagerpetids, [3] with later formulations specifically excluding pterosaurs from the group. [4]
Neornithischia was first named by Cooper in 1985 and defined as "all genasaurians more closely related to Parasaurolophus walkeri than to Ankylosaurus magniventris or Stegosaurus stenops". [3] In 2021, Neornithischia was given a formal definition under the PhyloCode : "The largest clade containing Iguanodon bernissartensis and Triceratops ...