1) Class 2) Superclass gnathostomata 
†Acanthodii (spiny sharks) Chondrichthyes (cartilaginous fishes) Actinopterygii (ray-finned fishes) Sarcopterygii (lobe-finned fishes) | authority = Gegenbaur, 1874 }} Gnathostomata ə are the jawed vertebrates. The term derives from Greek γνάθος (gnathos) `jaw` + στόμα (stoma) `mouth`. Gnathostome diversity comprises roughly 60,0...
Gnathostomata is a branch of the Sub-Phylum Craniata group of animals. The mouth is bounded by jaws which are formed from the mandibular visceral arch.
[n] - comprising all vertebrates with upper and lower jaws
superclass Gnathostomata noun comprising all vertebrates with upper and lower jaws