Tyrannosaurus

Tyrannosaurus
Skeleton at the Carnegie Museum of Natural History
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Family:	†Tyrannosauridae
Subfamily:	†Tyrannosaurinae
Genus:	†Tyrannosaurus Osborn, 1905
Type species
†Tyrannosaurus rex Osborn, 1905
Other species
†Tyrannosaurus bataar? Maleev, 1955 †Tyrannosaurus zhuchengensis? Hu, 2001 †Tyrannosaurus mcraeensis Dalman et. al, 2024
Synonyms
Genus synonymy Dinotyrannus Olshevsky & Ford, 1995 Dynamosaurus Osborn, 1905 Manospondylus Cope, 1892 Nanotyrannus Bakker, Williams & Currie, 1988 Stygivenator Olshevsky, 1995 Tarbosaurus? Maleev, 1955 Species synonymy Aublysodon amplus? Marsh, 1892 Deinodon amplus? (Marsh, 1892) Manospondylus amplus? (Marsh, 1892) Stygivenator amplus? (Marsh, 1892) Tyrannosaurus amplus? (Marsh, 1892) Aublysodon cristatus? Marsh, 1892 Deinodon cristatus? (Marsh, 1892) Stygivenator cristatus? (Marsh, 1892) Manospondylus gigas Cope, 1892 Dynamosaurus imperiosus Osborn, 1905 Tyrannosaurus imperiosus (Osborn, 1905) Albertosaurus lancensis (Gilmore, 1946) Aublysodon lancensis (Gilmore, 1946) Deinodon lancensis (Gilmore, 1946) Gorgosaurus lancensis Gilmore, 1946 Nanotyrannus lancensis (Gilmore, 1946) Dinotyrannus megagracilis Olshevsky & Ford, 1995 Stygivenator molnari (Paul, 1988 Ornithomimus grandis (Marsh, 1897)

Tyrannosaurus (meaning "tyrant lizard")^[1] was a large predatory dinosaur from the Upper Cretaceous, 68 to 65 million years ago.^[2]

Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Compared to the large and powerful hind limbs, its forelimbs were small, but powerful for their size. They had two clawed digits. It was the last known tyrannosaurid.

There is discussion as to whether it was a hunter or a scavenger. Like most dominant meat-eaters of today, such as lions and hyenas, Tyrannosaurus might have been both. It had a very strong jaw, and its bite power could snap the bones of smaller dinosaurs.

The most famous species of tyrannosaurus is Tyrannosaurus rex. More than 30 specimens have been found. Some of them are nearly complete skeletons, and soft tissue and proteins have been reported in at least one of these specimens. Research is done on its biology, life history and biomechanics. The feeding habits, physiology and potential speed of Tyrannosaurus rex are some topics of debate.^[3] Some scientists think Tarbosaurus bataar from Asia is a second species of Tyrannosaurus, but others think Tarbosaurus is a separate genus.

Tyrannosaurus became extinct in the Cretaceous–Tertiary extinction event, which wiped out half of all species on Earth.

1. ↑ "Tyrannosaurus Meaning in Greek - English to Greek Dictionary".
2. ↑ Hicks J.F. et al 2002. Magnetostratigraphy and geochronology of the Hell Creek and basal Fort Union Formations of southwestern North Dakota and a recalibration of the Cretaceous–Tertiary Boundary. in J.H. Hartman, K.R. Johnson & D.J. Nichols (eds) The Hell Creek Formation and the Cretaceous–Tertiary boundary in the northern Great Plains: an integrated continental record of the end of the Cretaceous. GSA Special Paper, 361: 35–55.
3. ↑ YouTube lecture at the Royal Institution by David Hone. [1]