The document discusses the diversity of chordates and vertebrates. It covers the four key characteristics of vertebrates, including having a notochord, hollow nerve cord, pharyngeal slits, and a tail that extends beyond the anus. It then describes the major groups of fish, including sharks, rays, bony fish, lobe-finned fish, and lungfish. Finally, it discusses the three orders of amphibians: frogs and toads, salamanders and newts, and caecilians.

1. Diversity of Fish and Amphibians Jeremiah was a bullfrog…..Joy to the fishes in the deep blue sea……

7. Tunicates

8. Lancelets

12. Class Agnatha (Jawless Fishes) Lamprey

13. Class Agnatha (Jawless Fishes) Hagfish

16. Class Chondricthyes (cartilaginous fishes) sharks

18. Class Chondricthyes Rays

19. Class Chondricthyes Skates

20. Class Chondricthyes The chimera, a living fossil!

23. Strange fish from the ray-finned fish family

25. Lobe-finned fish: The coelacanth

27. Lungfish

34. Frogs and Toads

37. Salamanders and Newts

38. Salamanders and Newts American Hellbender Japanese Giant Salamander

40. Caecilians

41. Chordates Vertebrate Invertebrate 4 characteristics Tunicates Lancelets larva notochord Hollow nerve cord dorsal side Pharyngeal slits Tail that extend beyond the anus

42. Fish Class Chondrichthyes Bony fish Skeleton hardened With calcium

43. Class Chondrichthyes Sharks and rays Cartilaginous skeleton

44. Bony fish Ray-finned fish Lobe-finned fish Lungfish Class Actinopterygii Class Actinista Class Dipnoi Most fish types coelocanths Ancestors to tetrapods Can breathe air

45. Amphibians Order Anura Order Urodela Order Apoda

46. Order Anura Frogs Toads jump walk Moist skin Rough, dry skin Partially aquatic Usually terrestrial Poison glands

47. Order Urodela salamanders Newts terrestrial aquatic tail tail Sometimes have External gills

48. Order Apoda caecilians legless tropical