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ROOT (OVERVIEW) > EUKARYOTA > Opisthokonta > METAZOA > Eumetazoa >

Bilateria (Ch. 27)

• Xenacoelomorpha (27-III)
• Protostomia (Ch. 28) >>>
  • Spiralia
    • Lophotrochozoa
      • Mesozoa
        • Dicyemida - Rhombozoans
        • Orthonectida - Orthonectids
      • Platyhelminthes - Flatworms
      • Nemertea - Ribbon Worms
      • Annelida - Segmented Worms
      • Phoronida - Horseshoe Worms
      • Brachiopoda - Lampshells
      • Mollusca - Molluscs
      • Bryozoa - Bryozoans
      • Entoprocta - Entoprocts
      • Cycliophora - Symbion pandora
      • Gastrotricha - Gastrotrichs
      • Acanthocephala - Thorny-Headed Worms
    • Gnathifera
      • Rotifera - Rotifers
      • Gnathostomulida
      • Micrognathozoa
      • Chaetognatha - Arrow Worms
  • Ecdysozoa
    • Nematoda - Roundworms
    • Nematomorpha - Horsehair Worms
    • Scalidophora
      • Kinorhyncha - Spiny-Headed Worms
      • Loricifera - Loriciferans
      • Priapulida - Priapulid Worms
    • Panarthropoda
      • Tardigrada - Tardigrades (Water Bears)
      • Onychophora - Velvet Worms
      • Arthropoda (Ch. 29) >>> (Arthropods)
        • Chelicerata
        • Mandibulata
          • Myriapoda
          • Pancrustacea
            • Crustacea
            • Hexapoda
              • Collembola - Springtails
              • Protura - Coneheads
              • Diplura
              • Insecta (Ch. 30) >>> (Insects)
• Deuterostomia (Ch. 31) >>>