FANDOM


iTyrannosaurs
TRex9
Conservation status
Extinct (fossil)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Saurischia
Suborder: Theropoda
Superfamily: Tyrannosauroidea
Family: Tyrannosauridae
Osborn, 1906
Genera

See text.

Tyrannosaurs, tyrant lizards or members of the Tyrannosauridae are a carnivorous dinosaur family whose name is derived from the Greek words tyrannos, meaning 'tyrant' and sauros, meaning 'lizard'.

Tyrannosaurids were originally classified as 'carnosaurs', along with most of the rest of the large theropods. Recent phylogenetic studies, however, have determined that tyrannosaurids are coelurosaurs, a group which also includes the ornithomimids and the maniraptorans. Thus, they are more closely related to dromaeosaurids than to other large predatory dinosaur groups such as the allosaurids. Discoveries of basal, coelurid-like tyrannosauroids have helped solidify this link. [1]


Tyrannosaurs are characterized by broad, massive skulls, short, powerful necks, and reduced 'arms' with only two digits. Notable specimens include "Jane", the world's most complete juvenile T. rex.

  • Weight: up to 6.4 tonnes (up to 7 US tons)
  • Length: up to 14 metres (up to 46 ft)
  • Location: Western Europe, North America, Central Asia, and East Asia (area dependent on species)
  • Period: Late Cretaceous

Taxonomy

Classification

The Tyrannosaurids contain several genera and species, of which Tyrannosaurus rex is undoubtedly the most well-known.

Phylogeny

Cladogram after Carr (2005) and Mortimer (2006, online)[1].

Tyrannosauridae
|-?Aublysodon
|-?Deinodon
|--Albertosaurinae
|  |--+--Appalachiosaurus
|  |  `-?+--Bagaraatan
|  |     `-?Xinjiangovenator
|  `--Albertosaurini
|     |--Gorgosaurus
|     `--Albertosaurus
`--Tyrannosaurinae
   |--Daspletosaurus
   `--+-?Alioramus
      |--Tarbosaurus
      |-?Tyrannosaurus? zhuchengensis
      `--Tyrannosaurus

References

  1. Xu, X., Norell, M. A., Kuang, X., Wang, X., Zhao, Q., and Jia, C. (2004). "Basal tyrannosauroids from China and evidence for protofeathers in tyrannosauroids." Nature, 431: 680-684.

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.