Mollusks

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  • + guest758ecf guest758ecf 7 months ago
    i found most of this presentation very helpful :)
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Society for the Legitimazation of the Ubiquitous Gastropod

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Mollusks - Presentation 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

+ Christina DrummChristina Drumm, 2 years ago

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