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''Ctenopleuron'' is an extinct genus of jawless fish in the class
Anaspida Anaspida ("without shield") is an extinct group of primitive jawless vertebrates that lived primarily during the Silurian period, and became extinct soon after the start of the Devonian. They were classically regarded as the ancestors of lampre ...
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References


External links

* Birkeniiformes genera Fossil taxa described in 1907 {{paleo-jawless-fish-stub