Note that Mya is million years ago. For example, "48.6～40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The time range and the epoch are shown in the Geological Time Table.

Phylogenetic Tree of Cnidarians

  • Kingdom Animalia
    • Phylum Cnidaria
      • Class Anthozoa (Corals, Sea anemones; 590 Mya～)
        • Subclass Hexacorallia
          • Order Tabulata (488～251.4 Mya)
          • Order Rugosa (Horn corals; 488～251.4 Mya)
          • Order Ceriantharia (Tube-dwelling anemone)
          • Order Actiniaria (Sea anemone; 590 Mya～)
          • Order Antipatharia (Black coral) Coral
          • Order Corallimorpharia
          • Order Scleractinia (Stony corals; 265 Mya～) Coral
          • Order Zoantharia
        • Subclass Octocorallia
          • Order Alcyonacea (Soft corals)
          • Order Helioporacea (Blue coral; 161.2 Mya～) Coral
          • Order Pennatulacea (Sea pen)
      • Class Medusae (590～501 Mya)
      • Class Cubozoa (Box jellyfish, Sea wasps)
        • Order Carybdeida Jellyfish
      • Class Hydrozoa (Hydroids, Hydra-like animals; 590 Mya～)
        • Subclass Leptolinae
          • Order Anthomedusae Jellyfish Coral
          • Order Leptomedusae Jellyfish
          • Order Siphonophorae Jellyfish
        • Subclass Trachylinae
          • Order Actinulidae Jellyfish
          • Order Limnomedusae Jellyfish
          • Order Narcomedusae Jellyfish
          • Order Trachymedusae Jellyfish
      • Class Scyphozoa (590 Mya～)
        • Order Conulariida (460.5～199.6 Mya) Jellyfish
        • Order Coronatae Jellyfish
        • Order Semaeostomeae Jellyfish
        • Order Rhizostomeae Jellyfish
      • Class Staurozoa (Stalked jellyfish)
        • Order Stauromedusae Jellyfish
      • Class Myxozoa (Parasites)
      • Class Polypodiozoa (Parasites)