Taxon talk:Quadrupedia

Classification
Mammals, reptiles, birds, lobe-finned fishes, ray-finned fishes, and cartilaginous fishes make up the group Gnathostomata (jawed vertbrates); so why is there "wastebasket taxon of jawless mammals" and jawless reptiles, ect? By definition, mammals, reptiles, and the beformentioned fishes have jaws.