Chordata
by Natalia Mendoza
1. Cephalochordata
1.1. Amphioxus
2. (something)
2.1. Tunicata
2.1.1. Appendicularia
2.1.2. Thaliacea
2.1.3. Ascidiacea
2.2. Craniata
2.2.1. Myxini
2.2.2. Vertebrata
2.2.2.1. Conodonta
2.2.2.2. Cephalaspidomorphi†
2.2.2.3. Hyperoartia
2.2.2.4. Pteraspidomorphi†
2.2.2.5. Gnathostomata
2.2.2.5.1. Placodermi†
2.2.2.5.2. Chondrichthyes
2.2.2.5.3. Teleostomi