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

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

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

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  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

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

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

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

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

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

  31. 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).

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

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

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

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

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

  37. 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

  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 - notochord – a rigid supporting rod

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

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

  41. 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

  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 - become sedentary as adults (filter)

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

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

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

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

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

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

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

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