So it could be that the ancestor of all pterygotes had three pairs of lobes, too, which could have been used to glide from the tops of, say, scale trees.

所以可能所有翼龙的祖先也有三对裂片，它们可以用来从树顶滑翔。

One theory holds that, if Rhyniognatha was a flying insect, that would mean that the pterygotes -- the taxonomic group that includes flying insects -- first came about in the early Devonian, say, more than 400 million years ago.

一种理论认为， 如果鼻颚龙是一种飞行昆虫，那就意味着翼龙——包括飞行昆虫在内的分类群——首先出现于泥盆纪早期，比方说，4 亿多年前。