Class Placodermi Infraorder Coccosteina Phylum Chordata | Subphylum Vertebrata Superfamily Dinichthyloidea Rank Genus | |
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Similar Arthrodira, Carolowilhelmina, Aspidichthys, Hadrosteus, Belemnacanthus | ||
Rhachiosteus pterygiatus is an extinct brachythoracid arthrodire placoderm from the Late Devonian of Germany. It is known only from a single specimen, which may be a larval or juvenile form, as the skull of said specimen is only 19 millimetres long.
References
Rhachiosteus Wikipedia(Text) CC BY-SA