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Gnathostomata Jaws Search HHG gardengeek 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. These branches come from Gnathostomata : Chondrichthyes Actinopterygii Sarcopterygii Tetrapoda - Four Legs What's This? Gnathostomata Jaws Vertebrata Vertibrates Chordata Chords Deuterostomia Mouth Second Bilateria Two-Way Symmetry Eumetazoa True Higher Animals Animalia Animals Eukaryota Cells with a Nucleus Re-Root the Tree with this Node No Image Type: crea

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