Chordata

Chordates have four common features. For instance, the dorsal hollow nerve cord, notochord, pharyngeal gill slits, and tail. There are 6 individual classes of chordates which are Class Chondrichthyes, Class Osteichthyes, Class Amphibia, Class Reptilia, Class Aves, and Class Mammalia. Below are the pictures of the four common structures that chordates have: