Dunkleosteus
From Wikimedia Commons, the free media repository
Domain: Eukaryota • Regnum: Animalia • Phylum: Chordata • Subphylum: Vertebrata • Classis: Placodermi • Ordo: Arthrodira • Superfamilia: Dinichthyloidea • Familia: Dinichthyidae • Genus: Dunkleosteus
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