答案解析

查看更多优质解析解答一举报Triceratops (three-horned face in Greek\") is a genus of herbivorous ceratopsid dinosaur that first appeared during the late Maastrichtian stage of the late Cretaceous period,

about 68 million years ago (Mya) in what is now North America.

Triceratops species possessed a sturdy build,

with strong limbs,

short hands with three hooves each,

and short feet with four hooves each.

Recent reconstructions of skeletons seem to show that Triceratops and other ceratopsids maintained an upright stance during normal locomotion,

with the elbows flexed and slightly bowed out,

in an intermediate state between fully upright and fully sprawling.

The hands and forearms of Triceratops retained a fairly primitive structure compared to other quadrupedal dinosaurs such as thyreophorans and many sauropods.

Triceratops walked with most of their fingers pointing out and away from the body,

the primitive condition for dinosaurs also retained by bipedal forms like the theropods.

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