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Mollusks

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a brief overview of mollusks for an introductory class

a brief overview of mollusks for an introductory class

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  • Society for the Legitimazation of the Ubiquitous Gastropod
  • Transcript

    • 1.  
    • 2. Phylum Mollusca
    • 3. Characteristics of Mollusks:
    • 4. Characteristics of Mollusks:
      • soft bodied
    • 5. Characteristics of Mollusks:
      • soft bodied
      • some have shells and some do not
    • 6. Snail
    • 7. Slugs
    • 8. Characteristics of Mollusks:
      • soft bodied
      • some have shells and some do not
      • first organism on earth with complete organ system
    • 9. Characteristics of Mollusks:
      • soft bodied
      • some have shells and some do not
      • first organism on earth with complete organ system
      • a coelom
    • 10. Characteristics of Mollusks:
      • soft bodied
      • some have shells and some do not
      • first organism on earth with complete organ system
      • a coelom
      • two body openings (mouth & anus)
    • 11.  
    • 12. Clams
    • 13. Characteristics of Mollusks:
      • soft bodied
      • some have shells and some do not
      • first organism on earth with complete organ system
      • a coelom
      • two body openings (mouth & anus)
      • all have a special organ called a mantle
    • 14. The Mantle:
    • 15. The Mantle:
      • thin membrane surrounding internal organ
    • 16. The Mantle:
      • thin membrane surrounding internal organs
        • secretes the shell material if there’s a shell
    • 17. Habitat:
    • 18. Habitat:
      • most are marine, some in freshwater
    • 19. Habitat:
      • most are marine, some in freshwater
      • few on land (only in moist environments)
    • 20. Mollusk Diversity
    • 21. Mollusk Diversity
      • Three main classes of mollusks:
    • 22. Mollusk Diversity
      • Three main classes of mollusks:
      Bivalves
    • 23. Mollusk Diversity
      • Three main classes of mollusks:
      Bivalves Gastropods
    • 24. Mollusk Diversity
      • Three main classes of mollusks:
      Bivalves Gastropods Cephalopods
    • 25. Bivalves
    • 26. Bivalves
      • two shells
    • 27. Bivalves
      • two shells
      • no distinct head
    • 28. Bivalves
      • two shells
      • no distinct head
      • filter feeders
    • 29. Clamming on the Beach in Oregon
    • 30. Giant Clams
    • 31. Scallop
    • 32.  
    • 33.  
    • 34. Mussels
    • 35. Abyssal threads on a mussel
    • 36. Oyster with Pearl
    • 37. Gastropods (“stomach foot”)
    • 38. Gastropods (“stomach foot”)
      • one shell or no shell
    • 39. Gastropods (“stomach foot”)
      • one shell or no shell
      • simple nervous system with small brain
    • 40. Gastropods (“stomach foot”)
      • one shell or no shell
      • simple nervous system with small brain
      • only mollusk found on land
    • 41. Gastropods (“stomach foot”)
      • one shell or no shell
      • simple nervous system with small brain
      • only mollusk found on land
        • most terrestrial ones are hermaphrodites
    • 42. Gastropods (“stomach foot”)
      • one shell or no shell
      • simple nervous system with small brain
      • only mollusk found on land
        • most terrestrial ones are hermaphrodites
      • snails, slugs, abalone, chitons, limpets
    • 43. Pacific Northwest Banana Slug
    • 44. All gastropods have a mouth with Radula
    • 45. Nudibranchs – poisonous sea slugs
    • 46.  
    • 47.  
    • 48. Abalone
    • 49.  
    • 50.  
    • 51.  
    • 52. Chiton
    • 53. Chiton on Rock
    • 54. Chiton
    • 55. Limpets
    • 56.  
    • 57. Cephalopods (“head foot”)
    • 58. Cephalopods (“head foot”)
      • the most complex and most recently evolved of all the mollusks
    • 59. Cephalopods (“head foot”)
      • the most complex and most recently evolved of all the mollusks
      • most complex nervous system of all invertebrates (highly organized brain)
    • 60. Cephalopods (“head foot”)
      • the most complex and most recently evolved of all the mollusks
      • most complex nervous system of all invertebrates (highly organized brain)
        • all have complex eyes that see images
    • 61. Cephalopods (“head foot”)
      • the most complex and most recently evolved of all the mollusks
      • most complex nervous system of all invertebrates (highly organized brain)
        • all have complex eyes that see images
      • propel themselves backwards with jets of water
    • 62. Cephalopods (“head foot”)
      • the most complex and most recently evolved of all the mollusks
      • most complex nervous system of all invertebrates (highly organized brain)
        • all have complex eyes that see images
      • propel themselves backwards with jets of water
      • includes squid, octopuses, the chambered nautilus
    • 63. Nautilus shell (the only shelled cephalopod)
    • 64.  
    • 65. Nautilus Eating a Crab
    • 66. Squid
    • 67.  
    • 68. Giant Squid (7 meters long)
    • 69. Octopus
    • 70. Squid & Octopus Defense:
    • 71. Squid & Octopus Defense:
      • ink to distract predators
    • 72. Squid & Octopus Defense:
      • ink to distract predators
      • most complex form of camouflage of any animal
    • 73. Squid & Octopus Defense:
      • ink to distract predators
      • most complex form of camouflage of any animal
      • intelligence ???
    • 74.  
    • 75. Octopus camouflage: http://www.youtube.com/watch?v=5rqhomPaxhE&feature=related http://www.youtube.com/watch?v=JJq-wAUmkeg
    • 76. Is the octopus “intelligent”? http://www.youtube.com/watch?v=T8cf7tPoN5o

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