Summary:
- Chordates include vertebrates and invertebrates that have a notochord.
- Tunicates are one of two subphyla of invertebrate chordates.
- Lancelets reproduce sexually and have separates sexes.
- Both tunicates and lancelets are small and primitive.
- They are probably similar to the earliest chordates that evolved more than 500 million years ago.
- Can you find tunicates?
- Name and describe the two subplurals of chordates: Tunicates and Cephalochordata.