Classification of the Arthropods

Phylum Arthropoda-arthropods

• Subphylum Trilobita-trilobites (fossils only)
• Subphylum Cheliceralta
  • Class Merostomata-horseshoe crabs (Xiphosura) and the fossil eurypterids (Eurypterida )
  • Class Arachnida-arachnids
  • Class Pycnogonida-sea spiders
• Subphylum Crustacea-crustaceans
  • Class Cephalocarida
  • Class Branchiopoda
  • Class Ostracoda
  • Class Copepoda
  • Class Mystacocarida
  • Class Remipedia
  • Class Tantulocarida
  • Class Branchiura
  • Class Cirripedia
  • Class Malacostraca
• Subphylum Atelocerata
  • Class Diplopoda-millipedes
  • Class Chilopoda-centipedes
  • Class Pauropoda-pauropods
  • Class Symphyla-symphylans
  • Class Hexapoda (Insecta)-HEXAPODS