Gorgonichthys
Encyclopedia
Gorgonichthys is an extinct arthrodire
Arthrodira
Arthrodira is an order of extinct armoured jawed fishes of the Placodermi class that flourished in the Devonian period before their sudden extinction, surviving for about 50 million years and penetrating most marine ecological niches....

 placoderm genus of the order Dinichthyoidea.
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