II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla a. Phylum Trilobita

1. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla a. Phylum Trilobita - jointed appendages on every segment - dominated in Paleozoic (600 – 250 mya)

2. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Eurypterids (“Sea Scorpions”)

3. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Eurypertids Horseshoe “Crabs”

4. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Scorpions Arachnids Spiders Mites Ticks

5. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya (scorpion-like)

6. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen

7. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen - Fusion of abdominal segments

8. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen - Fusion of abdominal segments - Gills or “book lungs”

9. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods

10. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods Centipedes

11. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods Centipedes Millipedes

12. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 2. Biology - spiracles for breathing

13. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Remipede

14. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Decapods (Shrimp, Loster, Crabs)

15. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Decapods (Shrimp, Loster, Crabs) Copepods Barnacles

16. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 2. Biology - three body regions - appendages modified for different functions; head for senses (antennae) and feeding; thorax for locomotion; abdomen for reproduction.

17. - appendages modified for different functions; head for senses (antennae) and feeding; thorax for locomotion; abdomen for reproduction.

18. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola

19. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola - Protura

20. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola - Protura - Insecta

21. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles

22. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles - Fusion of segments into three regions: head, thorax, abdomen

23. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles - Fusion of segments into three regions: head, thorax, abdomen - Flight in insects

24. II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 3. Why are there SO MANY insect species?? - flight: high powers of dispersal - small: so they are unlikely to get back to the same place the left. - tough: exoskeleton resists desiccation - fecund: have lots of offspring increase probability of geographical isolation increase probability of establishing a population

25. II. Animal Diversity C. Bilateria 1. Protostomes – blastopore forms mouth a. Lophotrochozoans b. Ecdysozoans 2. Deuterostomes – blastopore forms anus a. Echinodermata b. Hemichordata c. Chordata

27. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars

28. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars - sea cucumbers

29. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars - sea cucumbers - sea urchins

30. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry”

31. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry” - internal skeleton – calcified plates

32. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry” - internal skeleton – calcified plates - filter feeders (Sea Lily), herbivores (sea urchins), predators (sea stars).

33. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus b. Hemichordata – Acorn Worms

34. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus b. Hemichordata – Acorn Worms - pharyngeal gill slits - hollow dorsal nerve tube

35. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters

36. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits

37. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube

38. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube - Post-anal tail

39. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube - Post-anal tail - notochord – a rigid supporting rod

40. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata - Tunicates

41. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva

42. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva - mobile as larva

43. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva - mobile as larva - become sedentary as adults (filter)

44. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 2. Cephalochordata – Lancelets

45. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 2. Cephalochordata – Lancelets - 4 traits - burrowers - filter feeders

46. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata

47. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits

48. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column

49. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends:

50. II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends: - increased locomotion