Evolutionary tree/Chordata

Context

• Life
  • Domain Eukaryota, organisms with cells containing a nucleus
    • Mitochondrial eukaryotes
      • "Opisthokonts"
        • Kingdom Animalia, animals
          • unnamed
            • Metazoa?, animals with differentiated tissues
              • Bilateria?, bilaterally symmetric animals with three cell layers
                • Deuterostomia?
                  • Phylum Hemichordata?
                    • Chordata

Tree

• Chordata
  • Urochordata? (sea squirts)
    • • Ascidacea?
      • Salpida?
    • • Dolioda?
      • Larvacea?
  • • Cephalochordata?, lancelets
    • Vertebrata?
      • Myxinoidea?, hagfish
      • Petromyzontiformes?, lampreys
      • ostracoderms? EXTINCT, PARAPHYLETIC
      • Conodonts? EXTINCT
      • Gnathostomata?
        • Class Placodermi? EXTINCT
        • Class Chondrichthyes, Sharks, Rays, Chimaeras
        • Class Acanthodii? EXTINCT
        • Osteichthyes (broad sense)
          • Actinopterygii
          • /Sarcoptergii
            • Dipnoi?
            • Actinistia?
              • Tetrapoda?