Gnathostomata
From Wikipedia, the free encyclopedia
| Gnathostomata Fossil range: Late Ordovician - Recent |
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| Gnathostomata are jawed vertebrates | |||||||||
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Gnathostomata is the group of vertebrates with jaws.
The group has been called a superclass that includes the familiar classes of fish, birds, mammals. It has been called a sister group of Agnatha, the jawless vertebrates. However, recent genetic studies are making some rethink the Gnathostomata grouping.
The Gnathostomata first appeared in the Ordovician period and became common in the Devonian period.
[change] Subgroups
- Class Placodermi†
- Superclass Chondrichthyes
- Microphylum Teleostomi
- Class Acanthodii†
- Class Actinopterygii
- Parvophylum Tetrapodiiformes
- Class Sarcopterygii
- Nanophylum Tetrapoda
