Surprise! I have returned with another biology coat of arms. This time we have a sub-phylum, Vertebrata.
Vertebrates belong to the animal kingdom, and the chordata phylum. They can be roughly divided into two camps: Fish, such as the X-ray Tetra, and tetrapods, such as the cheetah. They are differentiated from other chordates by the vertebral column, a segmented structure of hard vertebrae and flexible joints. Some vertebrates lose this anatomy when entering into adulthood. All Vertebrates are built on the chordate body plan, with the mouth at the front, anus at the end, brain function concentrated in the head, and a central nervous system. All vertebrates possess gills, though most tetrapods lose them while still embryos.
This sub-phylum contains about 64,000 species known to science. The Vertebrates make up the overwhelming majority of phylum Chordata, but only 4% of the Animal Kingdom. They first appear in the fossil record around 525 million years ago, during the Cambrian Explosion. Myllokunmingia is believed to be the earliest vertebrate, however it can not be proven that it was far enough along the path to erm... growing a backbone.
You may have noticed that I did not include a motto on this one. I was tempted, but I have a feeling that I'll be doing a lot more coat of arms in the future; I have seven classes to do soon. I don't think I'll be able to think of mottos for all of them, so I'm just going to keep that as a kingdom thing.