Phylum Chordata

dorsal, hollow nerve cord
gill slits
tail
notochord - firm, flexible rod that extends the length of the body

Not all members of Chordata are "vertebrates"

Subphylum Vertebrata

  Class Agnatha - lamprey  ("no jaws")
  Class Chondrichthyes - sharks and rays (fish with cartilagenous skeleton)
  Class Osteichthyes - fish with skeleton of bone
  Class Amphibia - frogs, toads, and salamanders
  Class Reptilia - lizards, snakes, crocodiles, turtles
  Class Aves - birds
  Class Mammalia - animals with hair and mammary glands
 
 

 Lab pictures                           other images

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