1. Ichthyology 425--Orders and higher taxa Phylum
Chordata
Craniata
Subphylum
Petromyzontiformes
Lepidosireniformes
Coelacanthiformes
Cyprinodontiformes
Gasterosteiformes
Acipenseriformes
Pleuronectiformes
Tetraodontiformes
Lepisosteiformes
Scorpaeniformes
Chimaeriformes
Myliobatiformes
Polypteriformes
Hiodontiformes
Salmoniformes
Percopsiformes
Atheriniformes
Myxiniformes
Anguilliformes
Characiformes
Squaliformes
Lamniformes
Clupeiformes
Cypriniformes
Esociformes
Lophiiformes
Rajiformes
Amiiformes
Elopiformes
Siluriformes
Gadiformes
Perciformes
Gnathostomata
Superclass ?
Class
Myxini
Cephalaspid-
omorphi
Placodermi
Chondrichthyes
Acanthodii
Osteichthyes ?
Actinoptergyii
Subclass
Holocephali
Sarcopterygii
Elasmobranchii
Division
Teleostei
Superorder
Ostariophysi
Acanthopterygii 6 7 8 9 10 11
lab

2. Pacific hagfish
end

3. Pacific hagfish
end

4. chestnut lamprey
end

5. sea lamprey
end

6. ostracoderms
end

7. placoderms
end

8. chimaeras and ratfishes
end

9. angel shark
end

10. spiny dogfish
end

11. white shark
end

12. nurse shark
end

13. sand tiger shark
end

14. blue shark
end

15. shark teeth
end

16. shark teeth
end

17. hammerhead sharks
end

18. eagle ray
end

19. ray egg cases
end

20. ray embryos
end

21. little skate
end

22. Atlantic stingray
end

23. Acanthodii--Climatius
end

24. African lungfishes
end

25. coelacanth
end

26. bichirs
end