Chordate

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Chordates Fossil range: Latest Ediacaran - Recent
Yellowfin tuna, Thunnus albacares
Scientific classification
Domain: Eukaryota Kingdom: Animalia Subkingdom: Eumetazoa (unranked) Bilateria Superphylum: Deuterostomia Phylum: Chordata Bateson, 1885
Typical Classes
See below

Chordata is a phylum (group) of animals which have a notochord. The group includes vertebrates, with some closely related invertebrates.

Contents 1 Classification 1.1 Taxonomy 1.2 Phylogeny 2 Other websites

[change] Classification

[change] Taxonomy

• Phylum Chordata
  • Subphylum Tunicata - (tunicates, formerly Urochordata; 3,000 species)
  • Subphylum Cephalochordata - (lancelets, 30 species)
  • Subphylum Vertebrata (vertebrates - animals with backbones; 57,739 species)
    • Infraphylum Agnatha (jawless vertebrates; 100+ species)
      • Class Myxini or Hyperotreti (hagfish; 65 species)
      • Class Conodonta (Conodonts)
      • Class Hyperoartia (Lampreys)
      • Class †Cephalaspidomorphi (Paleozoic jawless fish)
      • Class †Pteraspidomorphi (Paleozoic jawless fish)
    • Infraphylum Gnathostomata (jawed vertebrates)
      • Class †Placodermi (Paleozoic armoured forms)
      • Class Chondrichthyes (cartilaginous fish; 300+ species)
      • Class †Acanthodii (Paleozoic "spiny sharks")
      • Superclass Osteichthyes (bony fishes; 30,000+ species)
        • Class Actinopterygii (ray-finned fish; about 30,000 species)
        • Class Sarcopterygii (lobe-finned fish)
      • Superclass Tetrapoda (four-legged vertebrates; 18,000+ species)
        • Class Amphibia (amphibians; 6,000 species)
        • Series Amniota (with amniotic egg)
          • Class Sauropsida - (reptiles; 8,225+ species)
          • Class Aves (birds; 8,800-10,000 species)
          • Class †Synapsida (mammal-like "reptiles"; 4,500+ species)
          • Class Mammalia (mammals; 5,800 species)

[change] Phylogeny

Chordata	Tunicata   Appendicularia (formerly Larvacea)  Thaliacea   Ascidiacea   Cephalochordata  Craniata  Myxini  Vertebrata   Conodonta†  Cephalaspidomorphi†  Hyperoartia  Pteraspidomorphi†  Gnathostomata   Placodermi†  Chondrichthyes  Teleostomi   Acanthodii†  Osteichthyes   Actinopterygii  Sarcopterygii  void  Tetrapoda   Amphibia  Amniota   Synapsida  void  Mammalia  Sauropsida  void  Aves

Note: Lines show likely evolutionary relationships. Extinct groups are marked with a "†". Extinct animals are ones that are not around anymore, but around in the past.

[change] Other websites

• Chordate node at Tree Of Life
• Chordate node at NCBI Taxonomy