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)