Experts are still unsure about the ancestry of pterosaurs. They are currently classified as belonging to a group of reptiles known as archosaurs, which include crocodiles, dinosaurs and birds.

• 专家学者对于翼龙究竟如何演进而来仍然没有定论。牠们目前被分类归在祖龙类，这一种爬虫类包括鳄鱼、恐龙和鸟类。