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。

For example, Gobisaurus was an early ankylosaurid that lived around 92 million years ago in what is now China.

例如，戈壁龙是一种早期的甲龙科动物，生活在大约 9200 万年前的现在的中国。

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。

And there looks to be more evidence even further back in the ankylosaurid family tree, in another Chinese ankylosaur called Liaoningosaurus.

在甲龙科的系谱树中， 似乎还有更多的证据，在另一种名为辽宁龙的中国甲龙中。

But, given its position in the ankylosaurid tree and the appearance of its tail vertebrae, it looks to be more early evidence that the handle evolved first.

但是， 鉴于它在甲龙科树中的位置及其尾椎的外观，它似乎是手柄首先进化的更早期证据。