Gnathostomata
Example of Gnathostomata: Dunkleosteus (Placodermi), spotted wobbegong (Chondrichthyes), silver arowana (Osteichthyes), and a Nile crocodile (Tetrapoda).
The Gnathostomata is the group of vertebrates that possess jaws and is thus distinct from the jawless fish, Agnatha. The Gnathostomata includes the Chondrichthyes, Osteichthyes, amphibians, reptiles, birds, and mammals.
