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Yangchuanosaurus shangyouensis

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Yangchuanosaurus shangyouensis
Yangchuanosaurus shangyouensis was a large carnivorous theropod that lived during the Late Jurassic period, approximately 163 to 157 million years ago, in what is now China. One of the top predators in its ecosystem, this dinosaur belonged to the family of metriacanthosaurids, a group of carnivores closely related to allosaurids.

With an estimated length of between 8 and 10 meters and a weight of up to 3 tons, Yangchuanosaurus was a formidable hunter. Its skull, more than a meter long, was robust and armed with sharp, serrated teeth, ideal for tearing the flesh of its prey. The eye sockets were large, suggesting that it had good vision, probably useful for both hunting and perceiving the environment.

This dinosaur was bipedal, with powerful hind legs that gave it speed and agility, allowing it to hunt large sauropods and other herbivores of its time. Its arms were relatively short but strong, ending in hands with sharp claws that could have been used to grab and injure prey. Its long, stiff tail helped it maintain balance while running or turning quickly.

Yangchuanosaurus fossils suggest it was a generalist predator, capable of hunting a variety of large prey, but also opportunistic, feeding on carrion when necessary. This flexible behavior would have allowed it to dominate its environment. Studies of its biomechanics indicate that, although it was not the fastest theropod, it had great muscle power in its hind legs, allowing it to attack with strength and endurance.

The discovery of Yangchuanosaurus in the Sichuan Basin, China, has provided valuable information about Late Jurassic ecosystems in Asia, and has allowed paleontologists to better understand the relationships between large theropods of that time. This predator occupied a high place in the food chain, coexisting with sauropods such as Mamenchisaurus, which it probably hunted in ambushes or in coordinated attacks if it hunted in groups.

Approximate measurements of Yangchuanosaurus:
  • 1:60 scale Assembly kit
    • Length 126 mm
    • Height 71 mm
    • Width 38 mm
    • Snout-tail length 183 mm

  • 1:35 scale Assembly kit
    • Length 216 mm
    • Height 122 mm
    • Width 66 mm
    • Snout-tail length 313 mm