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, though, 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 like the allosaurs. Discoveries of basal, "coelurid"-like tyrannosauroids have helped solidify this link. Quite ironically, the immense Tyrannosaurus may prove to be, in technical terms, not a true dinosauria but perhaps the largest aves to ever live.

Tyrannosaurs are characterized by broad, massive skulls, short, powerful necks, and reduced arms with only two digits.

• 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 and East Asia (area dependent on species)
• Period: Late Cretaceous

List of Species

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The Tyrannosaurids contain several genera and species, of which Tyrannosaurus rex is undoubtedly the most well-known. The following is a list of all known tyrannosaur genera:

• Superfamily Tyrannosauroidea
  • (primitive tyrannosaurs)
  • Family TYRANNOSAURIDAE
    • Aublysodon
    • Deinodon
    • Subfamily Albertosaurinae
      • Gorgosaurus
      • Albertosaurus
    • Subfamily Tyrannosaurinae
      • Alioramus
      • Tribe Tyrannosaurini
        • Daspletosaurus
        • Tarbosaurus
        • Nanotyrannus
        • Tyrannosaurus

Tyrannosaurs

Tyrannosauridae | Tyrannosauridae | Tyrannosauridae | Tyrannosauridae | טירנוזאורידים | Tyrannosauridae | ティラノサウルス科 | Tyrannosauridae | Tyrannosauridae