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

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

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

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

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

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

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

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

9. 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”

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

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

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

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

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

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

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

17. 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.

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

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

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

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

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

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

24. 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

25. 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

26. 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

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

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

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

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

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

33. 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).

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

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

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

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

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

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

40. 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

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

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

44. 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)

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

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