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garden

579 B

Raw Blame History

Chordata

Member of the Deuterostomia
Most basal branch: Cephalochordata
- Barely has a central nervous system
- 5 synapomorphies
  - notochord
  - dorsal hollow nerve cord
  - endostyle
  - pharyngeal slits
  - post-anal tail
- Invertebrate
Main branch
- Urochordata
- Vertebrata
First Chordates appeared in the Cambrian

Taxonomy

Chordata
- Cephalochordata
- Olfactores
  - Urochordata
  - Vertebrata
    - Jawless Fishes
      - Hagfishes
      - Lampreys
    - Gnathostomata