Theropoda

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Theropoda

[thi′räp·əd·ə]
(paleontology)
A suborder of carnivorous bipedal saurischian reptiles which first appeared in the Upper Triassic and culminated in the uppermost Cretaceous.

Theropoda

 

a suborder of saurischian dinosaurs. The suborder embraced more than ten families, which were united in two superfamilies (or infraorders): Coelurosauria and Carnosauria. Coelurosaurs, relatively small in size, had developed anterior extremities and a rather small skull; late forms lacked teeth. Carnosaurs, giant predators with reduced anterior extremities, had a huge skull and powerful teeth.

Theropods were the principal group of terrestrial predatory vertebrates of the Mesozoic (Middle Triassic to the end of the Cretaceous). Some may have fed on social insects, such as termites and ants, or even on the fruits of trees. They walked on two legs. Remains of theropods are known from Mesozoic deposits of all continents; in the USSR, remains have been found in Kazakhstan, Middle Asia, and Transbaikalia.

REFERENCE

Osnovy paleontologii: Zemnovodnye, presmykaiushchiesia i ptitsy. Moscow, 1964.
References in periodicals archive ?
The book is divided into sections that put numerous amazing theropod facts at your fingertips.
The aim of this study is to establish if cursorial birds have hindlimbs similar to the hindlimbs of primitive theropod dinosaurs compared to other groups of cursorial animals, in order to identify kinematic analogs of the limbs of these extinct animals.
Dr Poropat said that having three major dinosaur groups sauropods, ornithopods and theropods represented on the same trackway surface was incredibly rare.
Yet, studies have shown that the primitive theropod Allosaurus also had hollow bones.
"Now we have Dracoraptor, a relatively complete two metre-long juvenile theropod from the very earliest days of the Jurassic in Wales."
"It may have been one of the first experiments in theropod evolution to try the transition." Another theropod, Limusaurus, may have made the switch a few million years earlier (SN: 7/18/09, p.
Martin Ezcurra, who is studying for his PhD, said the Chilesaurus diegosuarezi, belonged to the family of two-legged theropods which included famous meateaters such as Jurassic Park star Velociraptor, Carnotaurus and T.
Theropods such as velociraptor and T rex - the species linked to modern birds - were more innovative and adaptable with their habitat and ways of gathering food, a study from Adelaide University has revealed.
As one of the most famous set of dinosaur tracks in the world, the Paluxy River tracks contain both theropod and sauropod footprints.
Palaeontologist John Ostrom's work in the 1970s describing the dinosaurian "raptor" Deinonychus reopened the debate with new evidence that supported a theropod ancestry for birds.
Among specific topics are theropod diversity and the refinement of avian characteristics, the pseudo-toothed birds and their bearing on the early evolution of modern birds, functional and phylogenetic diversity in marine and aquatic birds, and the state of the world's birds and the future of avian diversity.
The devil is a link between dinosaurs and the oldest dinosaurs with Jurassic species of theropod dinosaurs.