Name: Oxyosteus.
Phonetic: Ox-e-o-ste-us.
Named By: Jaekel‭ ‬-‭ ‬1911
Synonyms: Platyosteus.
Classification: Chordata,‭ ‬Placodermi,‭ ‬Arthrodira,‭ ‬Brachythoraci,‭ ‬Coccosteina,‭ ‬Brachydeiroidea,‭ ‬Brachydeiridae.
Species: O.‭ ‬rostratus‭ (‬type‭)‬,‭ ‬O.‭ ‬magnus.
Diet: Carnivore/Piscivore.
Size: Skulls of O.‭ ‬rostratus about‭ ‬11-13‭ ‬centimetres long,‭ ‬Skulls of O.‭ ‬magnus about‭ ‬18‭ ‬centimetres long.
Known locations: Poland.
Time period: Frasnian of the Devonian.
Fossil representation: Mostly skulls,‭ ‬but some partial post cranial remains.

       Oxyosteus is a genus of arthrodire placoderm fish that lived in the waters of Easterrn Europe during the late Devonian.‭ ‬Oxyosteus had a flattened body and an elongated snout.‭ ‬The eyes would have been relatively large in comparison to the size of the skull,‭ ‬indicating that Oxyosteus was probably a visually orientated predator.‭ ‬So far two species have been assigned to the genus,‭ ‬of which O.‭ ‬magnus was slightly larger.


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