Yangchuanosaurus facts for kids
Quick facts for kids YangchuanosaurusTemporal range: Jurassic
175.6–154 mya |
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| Y. zigongensis | |
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Yangchuanosaurus
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Yangchuanosaurus was a genus of theropod dinosaur from the Jurassic of China. It was a fairly typical carnosaur, with a large head, sharp, serrated teeth, and relatively short arms (though not as short as those of Tyrannosaurus). It was the largest predator in its part of the world. Yangchuanosaurus probably preyed on sauropods, such as Mamenchisaurus, or stegosaurs, such as Tuojiangosaurus.
There are two species. Y. zigongensis is from the Middle Jurassic, and Y. shangyouensis is from the Upper Jurassic. Specimens were collected from the Dashanpu Dinosaur Quarry of Zigong, Sichuan.
The Middle Jurassic Y. zigongensis is known from four incomplete specimens. There are two specimens of the Upper Jurassic Y. shangyouensis, which were at first put into separate species. Later analysis showed they were probably different ages or variations of the same species.
The first skull is 82 cm (2.7 ft) long, and its total body length about 8 m (26 ft). The other specimen was even larger. It had a skull length of 1.11 m (3.6 ft). It may have been up to 10.8 m (35.4 ft) long, and weighed as much as 3.4 metric tons (3.7 short tons). There was a bony knob on its nose and multiple hornlets and ridges, similar to Ceratosaurus. It had a massive tail that was about half its length.
Images for kids
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Close-up view of a skull cast
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Life reconstruction of Y. shangyouensis
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Mounted skeletons of Yangchuanosaurus and Tuojiangosaurus, Beijing Museum of Natural History
See also
In Spanish: Yangchuanosaurus para niños
