Synapsids were one of the four main divisions of early reptilian life, the others being anapsids, euryapsids, and diapsids.

下孔亚纲是早期爬行动的4主要部之一，3部分别是缺孔亚纲、调孔亚纲和双孔亚纲。

Synapsids had one hole in their lower temples; diapsids had two; euryapsids had a single hole higher up.

下孔亚纲在颞颥下部有1孔；双孔亚纲有2孔；调孔亚纲只有上部1孔。

The synapsids divided into four streams, only one of which survived beyond the Permian.

下孔亚纲分成四支，只有一支闯过了二叠纪。

The Dimetrodon was in fact a synapsid.

异齿龙实际上是一种下孔亚纲动。

So there's branchiopods, ostracods, copepods, cladocerans...and besides the crustaceans, there's a lot more.

有叶足动、介形亚纲动、桡足类动、水蚤类动....除了甲壳类动外，还有很多。这是真的，还有很多。

The earliest armored fish we have fossils of is called Sacabambaspis, a member of the subclass known as Arandaspida.

我们拥有化石的最早的装甲鱼被称为 Sacabambaspis，它是 Arandaspida 亚纲的成员。

All modern amphibians—frogs, toads, salamanders, and the legless caecilians—belong to the same subclass of animals known as the Lissamphibia.

所有现代两栖动——青蛙、蟾蜍、火蜥蜴和无腿的盲肠动——都属于被称为 Lissamphibia 的同一动亚纲。

And it's actually quite a small animal because contrary to all the famous theropods like the Tyrannosaurus, theropods started out as quite small animals.

与所有著名的兽脚亚目恐龙（如霸王龙）相反，事实上，它是一种体型娇小的动，因为兽脚亚纲动一开始是相当小的。

Among the several subclasses (or " orders" in biology) of reptiles are snakes and lizards, turtles and tortoises, crocodiles and alligators, and the tuatara, a marine lizard in New Zealand.

在几亚纲(或生学的“目”)的爬虫类中，有蛇和蜥蜴、乌龟和陆龟、鳄鱼和短吻鳄以及虫蜥蜴——一种现存于新西兰的海蜥蜴。

In Conseil I had a seasoned specialist in biological classification, an enthusiast who could run with acrobatic agility up and down the whole ladder of branches, groups, classes, subclasses, orders, families, genera, subgenera, species, and varieties.

在康塞尔，我有一位经验丰富的生分类专家，一位狂热的生分类爱好者，可以像杂技演员一样敏捷地在分支、类群、纲、亚纲、目、科、属、亚属、种和变种的整阶梯上上下奔跑。