The skulls of archosaurs were lighter than their reptile ancestors.

类头骨比 它们爬行动物祖先轻。

Throughout this period the diapsids also exploded, a  group containing lizards and snakes as well as… archosaurs.

在这一时期， 双孔类动物也迅速繁衍，这一群体包括蜥蜴、蛇以及… 类。

Some archosaurs, like crocodylians, have been shown to exhibit general parenting behavior.

一些，如鳄鱼，已被证明表现出一般养育行为。

The End-Triassic extinction saw the end of many of the pseudo sukian archosaurs that were dominant during the Triassic.

三末绝见证了许多在三期间占导地位伪苏氏终结。

After the Permo-Triassic extinction, pseudosuchians were the first group of archosaurs to diversify and become common.

在二-三绝之后，伪鳄是第一批多样化并变得普遍类。

Pterosaurs, another group of archosaurs (or " ruling reptiles" ) like the dinosaurs, may have developed feathers earlier than their dino cousins did.

翼是另一种像恐一样祖（或“统治型爬行动物”)，可能比它们恐表亲更早进化出了羽毛。

Most paleontologists consider pterosaurs to be a type of archosaur, a group that includes dinosaurs and crocodiles, among other things.

大多数古生物学家认为翼是一种类，包括恐和鳄鱼等。

Around 250 million years ago, during the Triassic period, a class of reptiles called archosaurs split into two main groups.

大约2.5亿年前，在三时期，一类被称为类爬行动物分裂成了两个要群体。

Meanwhile, with these predators running around, another line of plant-eating archosaurs, the aetosaurs, came to be covered in bony armor.

与此同时， 随着这些捕食者四处活动，另一类植食性类——楔齿，开始被覆盖上骨质甲胄。

But after the extinction event at the end of the Cretaceous, the non-avian dinosaurs and other large archosaurs were gone.

但在白垩末绝事件后，非鸟类恐和其他大型类消失了。

During the Triassic Period a group of animals branched off from the archosaur family tree at roughly the same time that dinosaurs did.

在三时期，一群动物从科树中分支出来时间与恐大致相同。

But based on its physical features, most studies classify Scleromochlus as an early ornithodiran, one of those " bird-line archosaurs" that include the pterosaurs.

但根据其物理特征， 大多数研究将斯克莱罗莫克卢斯归类为早期鸟类近亲，即那些包括翼在内“鸟系类” 。

And some of the archosaurs they used were maternal, meaning that parenting is done by the females, and some were paternal, where the dads do the work.

他们使用一些是母性，这意味着育儿是由雌性完成，而有些是父性，父亲负责工作。

The study then compared that data with the same info from different groups of living archosaurs, the group that includes birds, non-avian dinosaurs, and also all of the crocodylians.

然后，该研究将该数据与来自不同现存类群相同信息进行了比较，该类群包括鸟类、非鸟类恐以及所有鳄鱼。

Today, we know that pterosaurs are a type of  archosaur, which means that they're part of the larger group that includes dinosaurs, birds, and  crocodilians, but this wasn't always so certain.

如今， 我们知道翼是一种鳄形目动物，这意味着它们属于一个更大群体， 这个群体包括恐、鸟类和鳄类，但这一点在过去并不总是那么确定。

For example, some lineages of reptiles took on the role of apex predators on land, and by 240 million years ago, a group of archosaurs, the rauisuchids, appear in the fossil record.

例如， 一些爬行动物谱系在陆地上扮演了顶级掠食者角色，到 2.4 亿年前，化石记录中出现了一群类劳氏鳄。