Phylum Chordata | Class Agnatha Family Pycnosteida Rank Genus | |
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Similar Psammosteidae, Heterostraci, Drepanaspis, Doryaspis, Pteraspidiformes | ||
Pycnosteus is an extinct genus of jawless fish from the Devonian. It is thought to have cruised through vegetation, eating small invertebrates which it knocked loose .
References
Pycnosteus Wikipedia(Text) CC BY-SA