I couldn ' t find the traits to phylum chordata in the book 这本书上找不到门科，脊索动物类
2.
Peacocks are classified in the phylum chordata , subphylum vertebrata , class aves , order galliformes , family phasianidae 孔雀被认为是脊索动物类，脊索动物亚门，鸟类。
3.
Information about various species of marine life mainly fish and mammals , conservation , research and news -含海洋生物图片，海藻贝壳类水母腔肠棘皮节肢及脊索动物
4.
There are about 45 . 000 species of chordates , occupying marine , fresh and brackish water and terrestrial habitats 有大约45 . 000种脊索动物，它们占据着海、淡水或淡咸水和陆地的生态环境。
5.
Chordates are bilaterally symmetrical , triploblastic , segmented coelomates which demonstrate a deuterostomic pattern of early embryonic development 脊索动物两侧对称、三胚层，分节的体腔，在胚胎发育的早期过程中，显示为后口类型。
6.
The sea urchin represents the first sequenced genome from the echinoderms , which are the closest known relatives of the chordates , the group that includes vertebrates , animals with spinal columns 海胆是首个被排序的棘皮动物，这是与离脊索动物（也包括有脊椎动物）最近的亲属。
7.
Phylogenetic analysis based on the amino acids of the ubiquitin / ribosomal fused proteins of different animals well reflected the established phylogeny of the chosen organisms , and amphioxus was branched off from chordates and formed a separate cluster with an intermediate placement between invertebrates and vertebrates in the tree 通过对ubiquitin的系统进化分析，发现文昌鱼ubf80除了具有脊椎动物和无脊椎动物的特征外，还具有自己的一些独特的特征，从分子水平上支持了文昌鱼是脊索动物进化过程中的一侧枝的观点。
