---

Phylum Chordata

---

• Chordate Features
• Evolutionary History
• Mammals Are Advanced Chordates

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

• 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

---

Webpages that Work! Zeuter Development Corporation
Post Office Box 225, Parry Sound, Ontario, CANADA P2A 2X3
Copyright © Zeuter Development Corporation, 1996-2022. All rights reserved.