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Phylum Chordata

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Phylum Chordata (3 subphylums, 44,000 species)
Animals with Backbone or Notochord

• Chordate Features
• Evolutionary History
• Mammals Are Advanced Chordates
  
  
  • Subphylum Urochordata (4 classes, +8 orders, +25 families, 2000 species)
  • Subphylum Cephalochordata (1 class, 1 order, 2 families, 25 species)
    Lancelets
  • Subphylum Vertebrata (8 classes, 41,700 species)
    Chordates with Segmented Backbone

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