Both those features--myomeres and notochords--are found only in chordates.

这两种特征——肌节和脊索——仅存在于脊索中。

Perhaps the chordate crowd, with their notochords, segmented muscles and big bony skeletons.

脊索，有脊索，分节肌肉和干瘪大骨架。

The answer then is The chordate.

答案脊索。

They lose taste on the front of the tongue, which is the area innervated by that chordate tympani nerve.

他们失去了舌前部的味觉，这个区域由那条咽鼓神经支配的。

Most of the main groups of the animal kingdom—arthropods, brachiopods, coelenterates, echinoderms, molluscs and even chordates, the branch from which vertebrates went on to develop—are found in the fossil beds of the Cambrian.

人们在寒武纪群落里发现了王国的主要集群，包括腕足、腔肠、棘皮、软体和脊索（脊椎进化的分支）。

The major groups of animals we see around us today -- from sponges to arthropods to chordates -- all showed up in this little window of time in the Cambrian.

今天我们看到的主要群体——从海绵到节肢再到脊索——都在寒武纪这个短暂的时间窗口中出现了。

Simple as it was, this was one of the earliest chordates -- part of the family that would give rise to the vertebrates and includes us, making us cousins over 500 million years removed.

尽管结构简单， 这却最早的脊索之一——属于一个最终演化出脊椎的家族， 而我们人类也属于这个家族，因此我们在5亿多年后成为了远亲。

It's called a Pikaia and it's a little wormlike creature but it's thought that this is a chordate, and that is the branch of life that we're in, so it could that this is our earliest known ancestor.

它叫皮卡虫，确实和普通虫子差不多，不过人们认为它一种脊索，也就说，它和我们同一类，所以这也我们最早的祖先了。