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General Biology: Animal Classification and Representative Organisms

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  • Phylum Mollusca - Class Gastropoda

    Includes snails, slugs, conches, and whelks.

  • Phylum Mollusca - Class Bivalvia

    Includes clams, mussels, scallops, and oysters.

  • Phylum Mollusca - Class Cephalopoda

    Includes squid; example genus: Logio.

  • Phylum Annelida - Class Polychaeta

    Includes clam worms or sand worms; example species: Nereis Virens.

  • Phylum Annelida - Class Oligochaeta

    Includes common earthworms; example species: Lumbricus Terrestris.

  • Phylum Annelida - Class Hirudinea

    Includes leeches; example genus: Hirudo.

  • Phylum Arthropoda - Subphylum Chelicerata - Class Merostomata

    Includes horseshoe crabs; example genus: Limulus.

  • Phylum Arthropoda - Subphylum Chelicerata - Class Arachnida - Order Araneae

    Includes common garden spiders; example genus: Argiope.

  • Phylum Arthropoda - Subphylum Chelicerata - Class Arachnida - Order Acari

    Includes wood ticks; example species: Dermacentor andersoni.

  • Phylum Arthropoda - Subphylum Crustacea - Class Malacostraca - Order Decapoda

    Includes common crayfish; example genus: Cambarus.

  • Phylum Arthropoda - Subphylum Crustacea - Class Maxillopoda - Order Copepoda

    Includes genus Cyclops.

  • Phylum Arthropoda - Subphylum Crustacea - Class Branchiopoda - Order Cladocera

    Includes genus Daphnia.

  • Phylum Arthropoda - Subphylum Myriapoda - Class Chilopoda

    Includes centipedes; example genus: Scolopendra.

  • Phylum Arthropoda - Subphylum Myriapoda - Class Diplopoda

    Includes millipedes; example genus: Spirobolus.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Orthoptera

    Includes grasshoppers; example genus: Romalea.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Isoptera

    Includes termites.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Hemiptera

    Includes true bugs such as stinkbugs and water striders.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Homoptera

    Includes cicadas and aphids.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Coleoptera

    Includes beetles.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Lepidoptera

    Includes butterflies.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Diptera

    Includes flies.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Siphonaptera

    Includes fleas.

  • Phylum Arthropoda - Subphylum Hexapoda - Class Insecta - Order Hymenoptera

    Includes bees and ants.

  • Phylum Echinodermata - Class Asteroidea

    Includes sea stars; example genus: Asterias.

  • Phylum Echinodermata - Class Echinoidea

    Includes sea urchins.

  • Phylum Chordata - Subphylum Vertebrata - Superclass Agnatha - Class Petromyzontida

    Includes lampreys; example genus and species: Petromyzon marinus.

  • Phylum Chordata - Subphylum Vertebrata - Superclass Gnathostomata - Class Chondrichthyes

    Includes dogfish sharks; example genus and species: Squalus acanthias.

  • Phylum Chordata - Subphylum Vertebrata - Superclass Gnathostomata - Class Actinopterygii

    Includes yellow perch; example genus and species: Perca flavescens.

  • Phylum Chordata - Subphylum Vertebrata - Class Amphibia

    Includes frogs; example genus and species: Rana pipiens.

  • Phylum Chordata - Subphylum Vertebrata - Class Reptilia

    Includes reptiles; example given: pigeon (note: pigeon is actually a bird).

  • Phylum Chordata - Subphylum Vertebrata - Class Mammalia

    Includes mammals; example given: fetal pig.