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teeth in the front of the jaws
spikes on its tail
plates on its back
Correct!
When stegosaurs evolved after Huayangosaurus, they no longer had teeth in the front of their jaws.
Scientific Name: Huayangosaurus taibaii
Pronunciation: HWAH-YAHNG-o-SAW-rus TIE-bay-eye
Meaning: "early Sichan lizard"
Locality Found: Sichuan, China
Age: Middle Jurassic, 180 to 160 million years ago
Length: 4 meters (13.5 feet) long
Weight: 1,360 kilograms (3,000 pounds)
Characteristics: This creature is known as a primitive stegosaur that had plates, spines, and teeth in the front of its mouth.
Which characteristic separates Huayangosaurus from all other stegosaurs?
Huayangosaurus is the most primitive stegosaur. This means:
it has features most like the first stegosaur
Huayangosaurus is the first stegosaur
the other stegosaurs were ashamed to talk to it
Correct!
The fossil record is incomplete. We can never know which was first stegosaur. Scientists believe Huayangosaurus was most like the first stegosaur.
Huayangosaurus, like some other stegosaurs, had huge spines sticking out from its shoulders.
Fact
OR
Fiction
?
Fact
The spines were probably used as protection against predators or to fight other Huayangosaurus.