Gnathostomata

For the echinoderm, see Gnathostomata (echinoid)

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• Placodermi
• Chondrichthyes
• Acanthodii
• Osteichthyes

Gnathostomata is the group of vertebrates with jaws.

Related Topics:
Vertebrate - Jaw

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The group is traditionally a superclass, including the familiar classes of fish, birds, and so forth, and a sister group of the jawless vertebrates Agnatha. However, recent genetic studies are causing a reassessment of Gnathostomata as a grouping.

Related Topics:
Superclass - Fish - Bird - Agnatha

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Other distinguishing characteristics of living gnathostomates are the myelin sheathes of neurons, and an adaptive immune system.

Related Topics:
Myelin - Neuron - Immune system

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For the phylogenetic tree of Gnathostomata see chordate. The traditional classes of Gnathostomata include:

Related Topics:
Phylogenetic tree - Chordate

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• Placodermi - extinct
• Chondrichthyes (cartilagenous fish)
• Acanthodii - extinct
• Osteichthyes (or Teleostomi) (bony fish)
• subclass Sarcopterygii (lobe-finned fish)
• subclass Actinopterygii (ray-finned fish)
• Amphibia (amphibians)
• Reptilia (reptiles)
• Aves (birds)
• Mammalia (mammals)
 
Gnathostomata: External link ►