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There are seven classes of vertebrates.

The five main classes of vertebrates are:

  • Mammals (Mammalia)
  • Birds (Aves)
  • Reptiles (Reptilia)
  • Amphibians (Amphibia)
  • Fish - which in turn are subdivided into Agnatha (jawless fish without scales, e.g. lampreys and hagfish); Chondrichthyes (sharks and rays, which have skeletons of cartilage rather than bone); and Osteichthyes (all the bony fish e.g. tuna, trout, whiting, etc.)
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11y ago

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