BIOL 201 Chp 1 Introduction to Invertebrates

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This is a lecture presentation for my BIOL 201 Invertebrate Zoology students on Chapter 1: Introduction to Invertebrates (Invertebrate Zoology 7E by Ruppert, Fox, & Barnes, 2004).

Rob Swatski, Assistant Professor of Biology, Harrisburg Area Community College - York Campus, York, PA.
Email: rjswatsk@hacc.edu

Please visit my website, BioGeekiWiki, for more biology learning resources: http://robswatskibiology.wetpaint.com

Visit my Flickr photostream for anatomy model photographs!
http://www.flickr.com/photos/rswatski/

Thanks for looking!

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BIOL 201 Chp 1 Introduction to Invertebrates

  1. 1. Chapter 1:Introduction to InvertebratesBIOL 201: Rob Swatski Assistant Professor of BiologyInvertebrate Zoology HACC-York
  2. 2. Invertebrates 99% of all extant animal species 1 million+ described species 10-30 million undescribed species Approx. 34 phyla 2
  3. 3. 3
  4. 4. Prokaryotes Eukaryotes No Organelles organelles present Nucleus No nucleus present Protists, Bacteria & fungi, plants, Archaea animals 4
  5. 5. 3 Domains of LifeBacteria Archaea Eukarya 5
  6. 6. Domain Bacteria 6
  7. 7. Domain Archaea 7
  8. 8. Domain EukaryaKingdom Kingdom Kingdom KingdomProtista Fungi Plantae Animalia 8
  9. 9. Kingdom Protista 9
  10. 10. Kingdom Fungi 10
  11. 11. Kingdom Plantae 11
  12. 12. Kingdom Animalia 12
  13. 13. DNAChromosomes Genes 13
  14. 14. 14
  15. 15. DNA double helix Single strand of DNA 15
  16. 16. 1859: Charles Darwin publishedThe Origin of Species 16
  17. 17. Main Ideasof Evolution Current species are descendants of ancestral species “Descent with modification” Natural selection Adaptation 17
  18. 18. 18
  19. 19. 19
  20. 20. Evolution accounts for the unity & diversity of life 20
  21. 21. Phylum Overview 21
  22. 22. 22
  23. 23. Protozoa Animal-like protists Not part of kingdom Animalia Not invertebrate animals Important evolutionary link 23
  24. 24. Phylum Poriferasponges 24
  25. 25. Phylum Cnidaria jellyfishes,25 corals, anemones
  26. 26. Phylum Ctenophoracomb jellies 26
  27. 27. Phylum Platyhelminthes flatworms 27
  28. 28. Phylum Nemertearibbon worms 28
  29. 29. Phylum Nematodaroundworms 29
  30. 30. Phylum Molluscachitons, clams, snails, slugs, squid, octopi 30
  31. 31. Phylum Annelida31 segmented worms
  32. 32. Phylum Arthropodahorseshoe crabs, arachnids,crustaceans, myriapods, insects 32
  33. 33. Phylum Phoronida33 lopohophorates
  34. 34. Phylum Brachiopoda34 lamp shells
  35. 35. Phylum Bryozoabryozoans 35
  36. 36. Ernst Haeckel 36
  37. 37. Phylum Echinodermatastarfishes, brittle stars,sea urchins, sea cucumbers, sand dollars 37
  38. 38. 38
  39. 39. Phylum Hemichordataacorn worms 39
  40. 40. Phylum Hemichordatapterobranchs 40
  41. 41. Phylum Chordatatunicates 41
  42. 42. Carl Linne“You can call me Carolus Linnaeus” 42
  43. 43. Taxonomy …Today Traditional rank-based Linnaean classification still used, but limited value Binomial nomenclature (Genus, species) still popular Much more emphasis on evolutionary relationships (phylogenetic systematics) Change is the only constant in taxonomy 43
  44. 44. Cladistics Modern method of understanding phylogeny Create phylogenetic trees (cladograms) Based on morphology or molecular data Homology vs. Analogy 44
  45. 45. 45
  46. 46. Autoapomorphies: evolutionary novelties 46
  47. 47. 47
  48. 48. Synapomorphies 48
  49. 49. 49
  50. 50. Ground Plan Helps our Basic set of understanding ofcharacteristics of differences & each phylum similarities between phyla 50
  51. 51. Example of a ground plan: 51
  52. 52. Credits by Rob Swatski, 2010 Visit my website for more Biology study resources! http://robswatskibiology.wetpaint.com http://www.flickr.com/photos/rswatskiPlease send your comments and feedback to: rjswatsk@hacc.edu This work bears an Attribution-Noncommercial Share Alike Creative Commons license. 52

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