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Giganotosaurus vs. Tyrannosaurus: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Published on November 28, 2023
Giganotosaurus refers to a large theropod dinosaur from the Late Cretaceous period, known for its size and predatory nature. Tyrannosaurus refers to a massive carnivorous dinosaur from the Late Cretaceous, famous for its size, strength, and iconic status.

Key Differences

Giganotosaurus was one of the largest meat-eating dinosaurs, living in what is now Argentina during the Late Cretaceous period. It is known for its massive size, potentially larger than Tyrannosaurus. Giganotosaurus was a bipedal predator with a large skull and sharp teeth, used for hunting large prey. Tyrannosaurus, however, abbreviated as T. rex, is one of the most well-known dinosaurs, living in North America during the Late Cretaceous period. It was an apex predator, known for its enormous size, powerful jaws, and short but strong arms. T. rex's massive skull and bone-crushing bite force made it a fearsome carnivore.
Giganotosaurus, estimated to reach lengths of around 40-43 feet, may have been larger than Tyrannosaurus, which averaged around 39-40 feet in length. However, the size comparisons are based on incomplete fossil records, leading to ongoing debates among paleontologists. While, tyrannosaurus is often considered to have had one of the strongest bite forces among all terrestrial animals, a key distinction from Giganotosaurus. Its robust build, powerful legs, and tail made it an efficient hunter, despite its relatively short arms.
Giganotosaurus lived in South America, Tyrannosaurus was primarily found in North America, indicating different geographical habitats. Their fossil records suggest they lived in different environments, with Giganotosaurus possibly hunting in packs, unlike the solitary hunting behavior often attributed to T. rex.

Comparison Chart


Around 40-43 feet in length.
Approximately 39-40 feet in length.

Period and Location

Late Cretaceous, South America (Argentina).
Late Cretaceous, North America.

Physical Features

Large skull, sharp teeth, bipedal.
Massive skull, powerful jaws, short arms.

Hunting Behavior

Possibly hunted in packs.
Likely a solitary predator.

Bite Force

Strong, but less than Tyrannosaurus.
One of the strongest bite forces among dinosaurs.

Giganotosaurus and Tyrannosaurus Definitions


A massive carnivorous dinosaur from the Late Cretaceous period.
The Giganotosaurus roamed the ancient lands of Argentina.


Known for its enormous size and powerful bite.
The Tyrannosaurus had a bite force unmatched by other dinosaurs.


One of the largest meat-eating dinosaurs known.
The Giganotosaurus was larger than many of its contemporaries.


An iconic dinosaur often depicted in popular culture.
The Tyrannosaurus is a favorite in many dinosaur-themed movies.


A theropod dinosaur with a large skull and sharp teeth.
The Giganotosaurus used its powerful jaws to hunt large prey.


Famous for its large skull and short arms.
The Tyrannosaurus's arms were small compared to its body.


A bipedal predator from the Cretaceous era.
The Giganotosaurus was a fearsome sight on two legs.


A theropod with a robust build and strong legs.
The Tyrannosaurus could move quickly despite its size.


A dinosaur known for its potential pack-hunting behavior.
The Giganotosaurus may have hunted in groups for efficiency.


A colossal carnivorous dinosaur from the Late Cretaceous.
The Tyrannosaurus was an apex predator in its ecosystem.


A very large carnivorous theropod dinosaur of the genus Giganotosaurus of the Cretaceous Period, having a massive skull and large teeth.


Any of various tyrannosaurid dinosaurs of the genus Tyrannosaurus, having a large head and teeth and short forelimbs, and including T. rex and possibly some other species. Also called tyrannosaur.


Any of several very large, carnivorous dinosaurs of the subfamily Giganotosaurinae, from the Cretaceous period.


See T. rex.


A large carnivorous dinosaur, of the genus Tyrannosaurus, found in North America during the late Cretaceous period.


Large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America


How large was the Giganotosaurus?

Approximately 40-43 feet in length.

What distinguishes the Tyrannosaurus's bite?

It had one of the strongest bite forces among dinosaurs.

Did the Tyrannosaurus have any unique physical features?

Notable for its massive skull and short, strong arms.

What did the Tyrannosaurus typically hunt?

Large herbivores and possibly other carnivores.

What type of predator was Giganotosaurus?

A large, bipedal carnivorous dinosaur.

What era did the Giganotosaurus live in?

The Late Cretaceous period.

Where was the Tyrannosaurus primarily found?

In North America.

Where did the Giganotosaurus live?

In what is now Argentina.

What era did Tyrannosaurus belong to?

The Late Cretaceous period.

How did the Tyrannosaurus move?

On two powerful legs, despite its large size.

Did Giganotosaurus hunt in packs?

Some theories suggest it may have.

How is the Tyrannosaurus depicted in movies?

Often as a formidable and fearsome predator.

How did the Tyrannosaurus use its arms?

Their function is still debated, given their small size.

Was the Giganotosaurus bigger than the Tyrannosaurus?

It's believed to have been slightly larger.

What is a key characteristic of the Tyrannosaurus?

Its iconic status in popular culture and paleontology.

What kind of habitat did Giganotosaurus inhabit?

Likely in diverse, possibly forested environments.

What were the main features of Giganotosaurus's skull?

Large with sharp teeth, suitable for a carnivorous diet.

What makes the Giganotosaurus significant in paleontology?

Its size and potential pack-hunting behavior are notable.

How does Giganotosaurus compare to other theropods?

It was among the largest of theropod dinosaurs.

Was the Tyrannosaurus the largest carnivorous dinosaur?

It was one of the largest, but not definitively the largest.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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