Pteraspida
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Pteraspidomorphi
(tə′ras·pə·də′mör′fī)
(vertebrate zoology) The equivalent name for Diplorhina.
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Pteraspida
| Pteraspida Temporal range: Ordovician - Devonian |
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|---|---|
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| Drepanaspis gemuendina, accompanied by Tiaraspis subtilis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Superclass: | Pteraspidomorphi Goodrich, 1909 |
| Class: | Pteraspida Goodrich, 1909 |
| Subclasses | |
Pteraspida is an extinct class of early jawless fish. The fossils show extensive shielding of the head. Many had hypocercal tails in order to generate lift to increase ease of movement through the water for their armoured bodies, which were covered in dermal bone. They also had sucking mouth parts and some species may have lived in fresh water. The taxon contains the subgruops Heterostraci, Astraspida, Arandaspida.
References
- Fishes of the World 4th edition (Joseph S. Nelson 2006)
External links
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