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 other Animals

  • Kingdom Animalia
    • Phylum Trilobozoa (Three-lobed animals)
    • Subkingdom Parazoa
      • Phylum Porifera (Sponge)
        • Class Chancelloriida (542~83.5 Mya)
        • Class Calcarea (Calcareous sponges; 542 Mya~)
        • Class Hexactinellida (Glass sponges; 630 Mya~)
        • Class Demospongiae (530 Mya~)
      • Phylum Placozoa
    • Subkingdom Eumetazoa
      • Clade Radiata (Diploblastic - Two germ layers)
        • Phylum Ctenophora (Comb jellies)
          • Class Tentaculata
            • Order Cestida Jellyfish
            • Order Cydippida Jellyfish
            • Order Lobata Jellyfish
            • Order Platyctenida Jellyfish
        • Phylum Cnidaria (Coral, Jelly fish)
      • Clade Bilateria (Triploblastic - Three germ layers)
        • Phylum Proarticulata
          • Class Vendiamorpha
          • Class Dipleurozoa
        • Phylum Orthonectida
        • Phylum Rhombozoa
        • Phylum Acoelomorpha
        • Phylum Chaetognatha (Arrow worms)
        • Clade Protostomia (First mouth)
          • Superphylum Ecdysozoa
            • Phylum Kinorhyncha (Mud dragons)
            • Phylum Loricifera
            • Phylum Priapulida (Penis worms)
            • Phylum Nematoda (Rround worms)
            • Phylum Nematomorpha
            • Phylum Lobopodia
              • Class Xenusia
            • Phylum Onychophora (Velvet worms)
            • Phylum Tardigrada
            • Phylum Arthropoda (Trilobite, Insect, Crustacean)
          • Superphylum Platyzoa
            • Phylum Platyhelminthes (Flat worms)
            • Phylum Gastrotricha
            • Phylum Rotifera
            • Phylum Acanthocephala
            • Phylum Gnathostomulida
            • Phylum Micrognathozoa
            • Phylum Cycliophora
          • Superphylum Lophotrochozoa
            • Phylum Sipuncula (Peanut worms)
            • Phylum Nemertea (Ribbon worms)
            • Phylum Phoronida
            • Phylum Bryozoa (Moss animals)
            • Phylum Entoprocta
            • Phylum Brachiopoda (Lamp shells)
              • Class Strophomenata (507~199.6 Mya) Lamp shell
              • Class Lingulata (530 Mya~) Lamp shell
              • Class Craniata (542 Mya~) Lamp shell
              • Class Rhynchonellata (520 Mya~) Lamp shell
            • Phylum Mollusca (Limpet, Snail, Slug, Octopus, Squid)
            • Phylum Annelida (Ringed worms)
            • Phylum Echiura (Spoon worms)
        • Clade Deuterostomia (Second mouth)
          • Phylum Vetulicolia
          • Phylum Hemichordata (Acorn worms, Graptolites)
            • Class Graptolithina (Graptolites; 513~345 Mya)
            • Class Enteropneusta (Acorn worms)
            • Class Pterobranchia
          • Phylum Echinoderm (Sea lily, Sea star, Brittle star, Sea urchin, Sea cucumber)
            • Subphylum Homalozoa
              • Class Stylophora (513~388.1 Mya)
            • Subphylum Pelmatozoa
              • Class Edrioasteroidea (516~272.5 Mya)
            • Subphylum Blastozoa
              • Class Blastoidea (Sea buds; 436~249.7 Mya)
              • Class Eocrinoidea (530~299 Mya)
              • Class Rhombifera (488.3~359.2 Mya)
            • Subphylum Crinozoa (Sea lily)
              • Class Crinoidea (513 Mya~)
                • Subclass Cladida (490~253.8 Mya)
                • Subclass Flexibilia (460.5~33.9 Mya)
                • Subclass Camerata (471.8~253.8 Mya)
                • Subclass Disparida (468.1~279.5 Mya)
                • Subclass Articulata (305 Mya~)
              • Class Paracrinoidea (468.1~450 Mya)
              • Class Cystoidea (513~391.9 Mya)
            • Subphylum Asterozoa
              • Class Ophiuroidea (Brittle stars; 468.1 Mya~)
                • Order Ophiurida (Sea star; 409.1 Mya~) Starfish
                • Order Phrynophiurida (Sea star; 412.3 Mya~) Starfish
              • Class Asteroidea (488.3 Mya~)
                • Order Platyasterida (Sea star; 472~302 Mya) Starfish
                • Order Brisingida (Sea star) Starfish
                • Order Forcipulatida (Sea star; 199.6 Mya~) Starfish
                • Order Paxillosida (Sea star; 183 Mya~) Starfish
                • Order Notomyotida (Sea star; 164.7 Mya~) Starfish
                • Order Spinulosida (Sea star; 199.6 Mya~) Starfish
                • Order Valvatida (Sea star; 216.5 Mya~) Starfish
                • Order Velatida (Sea star; 199.6 Mya~) Starfish
            • Subphylum Echinozoa
              • Class Echinoidea (Sea urchin; 530 Mya~)
                • Subclass Perischoechinoidea
                  • Order Cidaroida (Pencil urchins; 279.5 Mya~)
                • Subclass Euechinoidea
                  • Order Hemicidaroida (130~89.3 Mya)
                  • Order Cassiduloida (130 Mya~)
                  • Order Spatangoida (Heart urchins; 145.5 Mya~)
                  • Order Diadematoida (228 Mya~)
                  • Order Clypeasteroida (Sand dollars; 140.2 Mya~)
                  • Order Holectypoida (542 Mya~)
              • Class Holothuroidea (Sea cucumbers; 513 Mya~)
                • Subclass Apodacea
                  • Order Apodida (409.1 Mya~)
                  • Order Molpadiida (228 Mya~)
                • Subclass Aspidochirotacea
                  • Order Aspidochirotida (450 Mya~)
                  • Order Elasipodida (418.1 Mya~)
                • Subclass Dendrochirotacea
                  • Order Dactylochirotida (199.6 Mya~)
                  • Order Dendrochirotida (450 Mya~)
          • Phylum Xenoturbellida
          • Phylum Chordata
            • Subphylum Vertebrata ⇒ Superclass Agnatha (Oldest fishes, Hagfish, Lamprey) ⇒ Amphibia, Reptile, Bird and Mammal
              • Class Conodonta (Resembling eels; 542~199.6 Mya)
            • Subphylum Cephalochordata
            • Subphylum Urochordata (Tunicate)
              • Class Ascidiacea (Sea squirts)
                • Order Phlebobranchia
              • Class Thaliacea
              • Class Appendicularia
              • Class Sorberacea
            • Subphylum Cephalochordata (Acraniata)