• Arthropoda
  • Phylum Arthropoda: The Jointed Feet

    Animals in the Phylum Arthropoda are considered Arthropods. This name origonates from the Greek, arthron, “joint” and podos “foot”. The jointed-feet as it were, includes insects, arachnids, and crustaceans to name a few. They are characterized by their jointed limbs that are made from α-chitin.

    Body Plan

    The body plan of arthropods is composed of repeated segments. Each segment has a pair of appendages.

    Diversity

    Partly due to their body plan, arthropods are a very versitile group. They comprise more than 80% of all described species.  In fact there are over 1 million described so far, with new ones being discovered all the time.

    Classification

    Class Insecta

    Most insects can be divided into the following major orders:

    • Blattodea: Cockroaches
    • Coleoptera: Beetles
    • Collembola: Springtails
    • Diptera: Flies
    • Embioptera: Webspinners
    • Ephemeroptera: Mayflies
    • Grylloblattodea: Ice Insect
    • Hemiptera: True Bugs
    • Homoptera: Cicadas
    • Hymenoptera: Bees, Ants…
    • Lepidoptera: Butterflies and Moths
    • Mallophaga: Chewing Louse
    • Mantodea: Preying Mantis
    • Mecoptera: Scorpion Fly
    • Megaloptera: Alderfly / Dobsonfly
    • Microcoryphia: Bristletails
    • Neuroptera: Lacewings / Antlions
    • Odonata: Dragonflies
    • Orthoptera: Grasshoppers
    • Phasmatodea: Walking Sticks
    • Phthiraptera: Louse wings
    • Piecoptera: Stoneflies
    • Psocoptera: Woodlice
    • Raphidoptera: Snakeflies
    • Siphonaptera: Fleas
    • Strepsiptera: small parasites
    • Thysanoptera: Thrips
    • Thysanura: Silverfish
    • Trichoptera: Caddisflies

     Other Arthropod Classes

    Arachnida – spiders, scorpions, etc.
    Merostomata – horseshoe crabs,eurypterids
    Pycnogonida – sea spiders
    Chilopoda – centipedes
    Diplopoda – millipedes
    Pauropoda – sister group to millipedes
    Symphyla – resemble centipedes
    Branchiopoda – brine shrimp etc.
    Remipedia – blind crustaceans
    Cephalocarida – horseshoe shrimp
    Maxillopoda – barnacles, copepods, fish lice, etc.
    Ostracoda – seed shrimp
    Malacostraca – lobsters, crabs, shrimp, etc.
    Entognatha – springtails, etc.

    Species listed under Arthropoda