Key to colors: DOMAIN, KINGDOM,Phylum,Subphylum,Class,Subclass,Order,Family
Links can be any color, but all links are underlined.

• BACTERIA (Ch. 17)
• ARCHAEA (Ch. 17)
• EUKARYOTA (Ch. 18)
  • Excavates
  • Amoebozoa
  • Rhizaria
  • Alveolata
  • Stramenopiles
  • Algae
  • VIRIDIPLANTAE (Ch. 19)
    • Chlorophyta - Green Algae
    • Streptophyta
      • Chlorokybophyceae
      • Klebsormidiophyceae
      • Mesostigmatophyceae
      • Zygnemophyceae (Gamophytes)
      • Streptophytina
        • Charophyceae (Stoneworts)
        • Coleochaetophyceae
        • Embryophyta (Ch. 20) (Land Plants)
          • Anthocerotophyta (Hornworts)
          • Marchantiophyta (Liverworts)
          • Bryophyta (Mosses)
          • Tracheophyta (Ch. 21) (Vascular Plants)
            • Lycopodiophyta
            • Euphyllophyta
              • Moniliformopses
                • Equisetopsida (Horsetails)
                • Psilotopsida (Whisk Ferns)
                • Marattiopsida (Ferns)
                • Ophioglossopsida (Ferns)
                • Polypodiopsida (Ferns)
              • Spermatophyta (Ch. 22) (Seed Plants)
                • Ginkgophyta (Ginkgo biloba)
                • Gnetophyta (Joint Firs)
                • Cycadophyta (Cycads)
                • Coniferophyta (Conifers)
                • Magnoliophyta (Ch. 23) (Flowering Plants)
  • Opisthokonta (18-IX)
    • FUNGI (Ch. 24)
      • Blastocladiomycota
      • Chytridiomycota
      • Cryptomycota
      • Entomophthoromycota
      • Glomeromycota
      • Microsporidia
      • Dikarya
        • Ascomycota
        • Basidiomycota
    • Choanoflagellida (18-IX)
    • METAZOA (Ch. 25)
      • Placozoa (Trichoplaxes)
      • Mesozoa
        • Rhombozoa
        • Orthonectida
      • Porifera (Sponges)
      • Eumetazoa (Ch. 26)
        • Cnidaria (Corals, Jellyfish)
        • Ctenophora (Comb Jellies)
        • Bilateria (Ch. 27)
          • Platyhelminthes (Flatworms)
          • Gnathostomulida
          • Protostomia (Ch. 28)
            • Lophotrochozoa
              • Acanthocephala (Thorny-Headed Worms)
              • Brachiopoda (Lampshells)
              • Bryozoa (Bryozoans)
              • Cycliophora (Symbion pandora)
              • Entoprocta (Entoprocts)
              • Gastrotricha (Gastrotrichs)
              • Myzostomida
              • Nemertea (Ribbon Worms)
              • Rotifera (Rotifers)
              • Micrognathozoa
              • Annelida (Segmented Worms)
              • Mollusca (Mollusks)
            • 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)
            • Chaetognatha (Arrow Worms)
            • Echinodermata (Starfishes, etc.)
            • Hemichordata (Acorn Worms)
            • Chordata (Ch. 32)
              • Tunicata (Tunicates)
              • Cephalochordata (Lancelets)
              • Craniata
                • Hyperotreti (Hagfishes)
                • Vertebrata (Ch. 33)
                  • Hyperoartia (Lampreys)
                  • Gnathostomata
                    • Chondrichthyes (Cartilaginous Fishes)
                    • Teleostomi (Ch. 34)
                      • Actinopterygii (Ray-Finned Fishes)
                      • Sarcopterygii
                        • Dipnoi (Lungfishes)
                        • Coelacanthiformes (Coelacanths)
                        • Tetrapoda (Ch. 35)
                          • Amphibia (Frogs and Salamanders)
                          • Amniota
                            • Sauropsida (Ch. 36)
                              • Lepidosauria
                              • Testudines + Archosauria group
                                • Testudines (Turtles)
                                • Archosauria
                                  • Crocodylia (Alligators, Crocodiles)
                                  • Dinosauria
                                    • Ornithischia
                                    • Saurischia
                                      • Tyrannosauridae
                                      • Aves (Ch. 37) (Birds)
                            • Mammalia (Ch. 38) (Mammals)