Arthropods (Invertebrates with Legs)

• Crustaceans: (e.g. crabs)

  • Have an exoskeleton
  • 1 pair of compound eyes
  • 2 body segment – cephalothorax and abdomen
  • More than four pairs of legs
  • 2 pairs of antennae sensitive to touch and chemicals
• Arachnids: (e.g. spiders)

  • 2 body segment – cephalothorax and abdomen
  • Four pairs of legs
  • Pair of chelicerae to hold prey
  • Two pedipalps for reproduction
  • Simple eyes
• Insects: (e.g. bees)

  • 3 body segments – head, thorax and abdomen
  • 3 pairs of legs
  • 1 pair of antennae
  • 1 or 2 pairs of wings
  • Compound
  • Simple eyes
• Myriapods: (e.g. centipede)

  • Segmented body
  • Additional segments formed
  • One pair of antennae
  • 70+ pairs of legs – 1 or 2 pairs on each segment
  • Fused head and thorax and segmented abdomen
  • Simple eyes