Meet the mollusks & arthropods
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Meet the mollusks & arthropods






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Meet the mollusks & arthropods Meet the mollusks & arthropods Presentation Transcript

  • Meet the Mollusks & Arthropoda Kingdom Animalia!
  • Phylum Mollusca
    • 2 nd largest phylum; more advanced than the last 3
    • 3 Classes we’ll cover:
      • A) Gastropods – “stomachs with feet”
      • B) Bivalves – “2 shells”
      • C) Cephalopods – “heads with feet”
  • A) Class Gastropoda
    • The Snails & Nudibranchs!
      • Some (snails) make their own shell
      • Snails move using a foot
      • Snails have an operculum – “Trap Door” slams shut to protect snail inside
      • Nudibranchs = shell-less snails
    Nudibranch: Snail:
  • B) Class Cephalopoda
    • The Squid and Octopus!
      • Most evolved mollusks
      • Have beaks and tentacles
      • Ink
      • Squids are largest invertebrate, but octopus are the most intelligent
  • Octopus smart & flexible!
  • C) Class Bivalvia
    • The Clams, mussels, scallops – oh my!
      • 2 shells
      • Most use foot to move, but scallops swim!
  • Phylum Arthropoda
    • Still Kingdom Animalia!
    • Two Subphyla We’ll Cover:
    • A) Subphylum Chelicerata – Sea Spiders &
    • Horseshoe Crabs
    • B) Subphylum Crustacea – Lobsters, Crabs,
    • Shrimp, for example
  • Can you name them? The only “attached” crustacean 
    • Subphylum Chelicerata a. Sea Spiders and b. Horseshoe Crabs
    Like all Arthropods, they have no bones and grow by molting! 
  • a. Class Pycnogonida (sea spiders-yipes!)
  • b. Class Merostomata Horseshoe Crabs are True Blue Blooded Creatures  We have ____________________ to make our blood red Many crustaceans have hemocyanin, making their blood blue !
  • Male Horseshoe Crabs Have Modified Front Legs That Look Like Boxing Gloves or Baseball Mitts to Help Hold onto the Female During Mating
  • 2. Subphylum – Crustacea – Lobsters, Crabs, and Shrimp – oh my!                                              
  • More Crustaceans: the sea insects Scuds, Beach Hoppers, Beach Fleas, and Skeleton Shrimp: The Amphipods
  • Still that familiar meroplanktonic larvae we know and love! Special Name: Zoea
  • Still No Skeleton – Molting Instead
  • The Smallest, Most Abundant Crustacean in the World’s Oceans: The Little Copepod  ??What’s the largest Crustacean?? Are You “CooCoo” for Copepods? Krill Kill Memory Jogger – why is this Crustacean Arthropod sad ? “ Help me!. . . . .I have no ice left to live in!”. . . . “My world is melting!. . . What am I supposed to eat?”. . . Where are all these jellyfish coming from?. . . 
  • What’s Going On Here????
  • Which Numbers Belong To Which Phyla? (Try the rest for a good review before the unit test!)
  • References (on our class website)