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Any of various theropod dinosaurs of the diverse group Coelurosauria of the Jurassic and Cretaceous Periods, having a stiff tail, hingelike ankle, usually long forelimbs, and sometimes featherlike structures, and including oviraptor and T. rex.

[From New Latin Coelūrosauria, group name : Greek koilos, hollow; see keuə- in Indo-European roots + Greek ourā, tail; see ors- in Indo-European roots + Greek sauros, lizard.]

coe·lur′o·saur′i·an adj. & n.


(Palaeontology) any of various small to very large bipedal carnivorous saurischian dinosaurs belonging to the suborder Theropoda, active in the Triassic and Cretaceous periods; Tyrannosaurus was a coelurosaur, and birds are thought to have evolved from small coelurosaurs
[C20: from New Latin, from Greek koilos hollow + ouros tail + -saur]
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He pointed out that there is no record of this character state in the majority of modern birds, in fossil species, in Archaeopteryx, in Crocodylia, or in Coelurosauria.
Si observamos cuales son los restos de teropodos existentes en el transito Jurasico superior-Cretacico inferior, no es posible discernir que tipo de Coelurosauria podria haber originado estas pisadas.
2009), asi como restos aislados de Dromaeosauridae, Ceratosauria, Allosauroidea y Coelurosauria (CANUDO & RUIZ-OMENACA, 2003).