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Gnathostomata
Jaws
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Gnathostomata (pronounced /ˌneɪθɵstoʊˈmɑːtə/) is the group of vertebrates with jaws. The term derives from Greek γνάθος (gnathos) "jaw" + στόμα (stoma) "mouth".

The group is traditionally a superclass, broken into three top-level groupings: Chondrichthyes, or the cartilaginous fish; Placodermi, an extinct clade of armored fish; and Teleostomi, which includes the familiar classes of bony fish, birds, mammals, reptiles, and amphibians. Some classification systems have used the term Amphirhina. It is a sister group of the jawless craniates Agnatha.

Gnathostomata :
Chondrichthyes
Actinopterygii - Ray Finned Fishes
Sarcopterygii
Tetrapoda - Four Legs

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Gnathostomata
Jaws
Vertebrata
Vertibrates
Chordata
Chords
Deuterostomia
Mouth Second
Bilateria
Two-Way Symmetry
Eumetazoa
True Higher Animals
Animalia
Animals
Eukaryota
Eukaryota
Cells with a Nucleus

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