And, among the ankylosaurids, only a small, derived subset, the ankylosaurines, had them.
而且，在甲龙科中，只有一小部分衍生的甲龙亚科有它们。
Ankylosaurids
原声例句
PBS地球-动物趣闻
PBS地球-动物趣闻
Now, the ankylosaur family tree can be split into two main groups, the ankylosaurids and the nodosaurids.
现在， 甲龙科可以分为两大类，甲龙科和结节龙科。
英语百科
Ankylosauridae
An ankylosaurid is a member of the armored dinosaur family Ankylosauridae that appeared 122 million years ago (along with another family of ankylosaurs, the Nodosauridae) and became extinct 66 million years ago during the Cretaceous–Paleogene extinction event. Ankylosaurids have been found in western North America, Europe and East Asia, though good specimens are rare; most are known only from bone fragments.
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