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Kingdom: Animalia
Sub Kingdom: Eumetazoa
Super Phylum: Bilateria:Deuterostomia
Phylum: Chordata
Sub Phylum: Urochordata - Vertebrata



All chordates have the following characteristics at some point in their life, even if only during embryo stages;

  • pharyngeal slits – a series of openings that connect the inside of the throat to the outside of the neck. These often but not always become gills.
  • dorsal nerve cord – a bundle of nerve fibers that run down the back, connecting the brain with muscles and other organs.
  • notochord – a cartilaginous rod running underneath and supporting the nerve cord.
  • post-anal tail – an extention of the body past the anal opening.



  • Urochordata - sometimes know as Tunicata or Sea Squirts. [1] Animals that have vertebrae in early development, but it is no longer present after full development.
  • Vertebrata - animals that have vertebrae




  1. 1.0 1.1 ( University of California Museum of Paleontology, Regents of the University of California, 1994 -2001.