Their ancestors were these things called eurypterids, or sea scorpions, and they were huge.

它们的祖先是广翅目动物，或者叫海蝎子，它们体型巨大。

In 2015, the earliest-known eurypterid, Pentecopterus decorahensis, was discovered rocks in Iowa that date back 467 million years.

2015 年，在爱荷华州的岩石中发现了已知最早的广翅目 Pentecopterus decorahensis，其历史可追溯到 4.67 亿年前。

A joint working group led by the Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, reported the rare eurypterid from Wenchang Formation of Anji County.

由中国科学院南京地质古生物研究所牵头的联合工作组报告了安吉县文昌组罕见的节肢动物板足鲎。

Campylocephalus was among the many casualties, and with its demise, the 210 million year age of eurypterids was brought to an end.

Campylocephalus 是众多死者之一，随着它的消亡， 广翅目 2.1 亿年的年龄也宣告结束。

The final eurypterid, Campylocephalus permianus, disappeared at the end of the Permian Period, during the biggest extinction event in Earth's history.

最后的广翅目动物 Campylocephalus permianus 在二叠纪末期消失，这是地球历史上最大的灭绝事件。

Scientists know " sea scorpions" by their proper, more accurate but also somewhat less cool name: eurypterids And eurypterids probably aren't ancestral to the arachnids we know as scorpions today.

科学家们通过它们正确的、更准确但也有点不那么酷的名字来了解“海蝎子”：广翅目和广翅目可能不是我们今天称为蝎子的蛛形纲动物的祖先。

Having a round head with a parabolic shell, the 15-cm-long species looks cuter than previously found eurypterid species, said Wang Han, a major participant in the research and a Ph.D. student with the institute.

这项研究的主要参与者、该研究所的博士生王晗说，这种 15 厘米长的物种有着圆形的头部和抛物线形的外壳，看起来比以前发现的板足鲎更可爱。