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]]