Genus

Valid Extinct

Tyrannosaurus

tyrant lizard

Osborn 1905

Etymology Roi des reptiles tyrans

Tyrannosaurus is a genus of large theropod dinosaur. The type species Tyrannosaurus rex, often shortened to T. rex or colloquially T-Rex, is one of the best represented theropods. It lived throughout what is now western North America, on what was then an island continent known as Laramidia. Tyrannosaurus had a much wider range than other tyrannosaurids. Fossils are found in a variety of geological formations which have been dated to the late Maastrichtian age of the late Cretaceous period, 69 to 66 million years ago, with isolated specimens possibly indicating an earlier origin in the middle Campanian age. It was one of the last known members of the tyrannosaurids and among the last non-avian dinosaurs to exist before the Cretaceous–Paleogene extinction event.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Carnivore Ground dwelling, solitary Terrestrial

click to enlarge

Wikimedia

PBDB ↗ Wikipedia ↗

Classification

Dinosauria Unranked clade

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Theropoda Unranked clade

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Neotheropoda Unranked clade

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Averostra Unranked clade

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Tetanurae Unranked clade

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Coelurosauria Unranked clade

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Tyrannosauroidea Superfamily

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Tyrannosauridae Family

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Tyrannosaurinae Subfamily

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Tyrannosaurini Tribe

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Tyrannosaurus Genus

Measurements

Height

3,6 m ⓘ

Length

12,5 m ⓘ

Tyrannosaurus rex

12 m ⓘ

Mass

9 500 kg ⓘ

Tyrannosaurus rex

Fossil sites 87 geolocated sites

Distribution

Top countries

🇺🇸 United States

🇨🇦 Canada

🇨🇳 China

🇷🇺 Russia

🇲🇽 Mexico

Geological formations

Hell Creek

Lance

Denver

Ferris

Frenchman

Scollard

Dinosaur Park

Kirtland

Judith River

Subashi

Temporal distribution

Maastrichtian (72.2–66 Ma)

Campanian (83.6–72.2 Ma)

Species (9)

Albertosaurus megagracilis subjective synonym of Tyrannosaurus rex 84 Ma

Aublysodon molnaris subjective synonym of Tyrannosaurus rex 84 Ma

Dynamosaurus imperiosus subjective synonym of Tyrannosaurus rex 84 Ma

Manospondylus gigas subjective synonym of Tyrannosaurus rex 84 Ma

Tyrannosaurus imperator subjective synonym of Tyrannosaurus rex 84 Ma

Tyrannosaurus mcraeensis 84 Ma

Tyrannosaurus regina subjective synonym of Tyrannosaurus rex 84 Ma

Tyrannosaurus rex 84 Ma

Tyrannosaurus turpanensis nomen dubium, species not entered Tyrannosaurus 84 Ma

Synonyms (6)

Dinotyrannus subjective synonym of Tyrannosaurus

Dynamosaurus subjective synonym of Tyrannosaurus

Manospondylus subjective synonym of Tyrannosaurus

Stygivenator subjective synonym of Tyrannosaurus

Tyrannosauripus nomen nudum Tyrannosaurus

Tyrannosaurus turpanensis nomen dubium, species not entered Tyrannosaurus

News 6

Tyrannosaurus rex Scavenged Duck-Billed Dinosaurs in Ancient Wyoming, Bite Marks Reveal

bone feeding hunting United States Cretaceous +5

Thousands of fossilized bones from a Cretaceous-period bonebed in Wyoming, the United States, offer rare physical evidence that Tyrannosaurus rex fed on the carcasses of a duck-billed dinosaur species called Edmontosaurus annectens. The post Tyrannosaurus rex Scavenged Duck-Billed Dinosaurs in Ancient Wyoming, Bite Marks Reveal appeared first on Sci.News: Breaking Science News.

16/07/2026 sci-news

He becomes the most expensive dinosaur in the world in 10 minutes: here is Gus' incredible story

museum Dinosauria Tyrannosaurus skeleton

It spent 67 million years buried in the ground before shaking an auction house. The skeleton of Tyrannosaurus rex nicknamed “Gus” was sold for $50.13 million at Sotheby’s in New York. An absolute record for a dinosaur, which revives the debate on the privatization of...

15/07/2026 futura-terre ⚙ Auto-translated

This dinosaur fossil captures the final moments of a T. rex attack

tooth predator prey fossil Dinosauria +4

A fossilized Edmontosaurus skull with a Tyrannosaurus tooth still embedded in its face has given scientists rare evidence of a dramatic predator-prey encounter. The discovery suggests the giant carnivore delivered an incredibly powerful face-to-face bite, offering new clues about how Tyrannosaurus hunted.

14/07/2026 sciencedaily

New Study Examines Tyrannosaur Reproduction Strategy

reproduction Dinosauria Tyrannosaurus bird study

A new study examining Tyrannosaurus rex hatchlings has provided fresh insight into the early lives of these famous theropod dinosaurs. Researchers writing in the journal "Biology" investigated evidence linked to the development and reproductive strategies of large meat-eating dinosaurs. The researchers concluded that tyrannosaurs produced relatively small hatchlings compared to modern birds. This suggests that

12/07/2026 everythingdinosaur

Review of New Tyrannosaurus Figure in Prestigious Magazine

toy Hell Creek Dinosauria Tyrannosaurus evolution

The Everything Dinosaur Evolution Tyrannosaurus rex model has received another fantastic endorsement. The inaugural figure in our new Evolution range has been reviewed in issue 157 of the prestigious "Prehistoric Times" magazine. The review highlights the first model in our Hell Creek series. It also features the figure alongside several new prehistoric animal model releases

25/06/2026 everythingdinosaur

T. rex took 40 years to reach full size, scientists find

growth predator fossil Tyrannosaurus study

Tyrannosaurus rex may have been a much slower grower than scientists realized. A new study of 17 tyrannosaur fossils found that the giant predator likely took about 40 years to reach its full size of roughly eight tons, extending previous estimates by 15 years.

22/06/2026 sciencedaily

Images 21

Bibliography

Original description

H. F. Osborn. 1905. Tyrannosaurus and other Cretaceous carnivorous dinosaurs. Bulletin of the American Museum of Natural History 21(14):259-265

Bibliography (43)

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Tyrannosaurus

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