1. Phylum Chordata What characteristics do all chordates possess?
What are the groups of nonvertebrate chordates?

2. Chordata Characteristics
4 key characteristics
Dorsal, hollow nerve cord
Notochord
Pharyngeal pouch
Tail that extends beyond anus
All of these characteristics must be present at some point in development

3. Representative Chordate

4. Nonvertebrate Chordates
Subphylum Urochordata (tunicates or sea squirts)
Larval form has all 4 characteristics
Adult form does not have notochord or tail

5. Nonvertebrate Chordates
Subphylum Cephalochordata (Lancelets)
Have all 4 characteristics throughout life

6. Invertabrates
vertebrates