The first suborder to appear was Stylonuria.

个出现是柱尿症。

But, during the Late Ordovician, a second suborder of sea scorpion emerges in the fossil record — the Eurytperina.

但是，在晚奥陶世期间，化石记录中出现了海蝎个——Eurytperina。

Sea scorpions would soon come to be defined by how they these appendages adapted, splitting off into two distinct suborders with two very different evolutionary strategies.

海蝎子很快就会根据这些附肢如何适应来定义，分为两个截然不同， 具有两种截然不同进化策略。

This led to much greater diversity in this suborder, which is probably why 75% of all known sea scorpion species -- and more than 95% of all the specimens ever found -- belong to Eurypterina.

这导致该更加多样化，这可能就是为什么 75% 已知海蝎物种——以及超过 95% 已发现标本——都属于广翅。