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Temporal range: Ordovician - Recent
The group was meant to include all jawed fish, but in modern fashion it also includes all the tetrapods as well, since they evolved from jawed fish. It is the sister group of the Agnatha, the jawless vertebrates.
Subgroups[change | change source]
- Chondrichthyes cartilaginous fish
- Acanthodii† 'spiny sharks'
- Placoderms† armoured fish
- Osteichthyes bony fish
|Wikispecies has information on: Gnathostomata.|