Dunkleosteus, a Devonian Fish

Dunkleosteus, a Devonian Fish

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Credit: STEPHEN J. KRASEMANN/SCIENCE PHOTO LIBRARY

Caption: Devonian Fish (Dunkleosteus) skull. Dunkleosteus measured up to 10 meters long and was the largest animal in the Devonian seas. Massive bony plates protected its head; a hinge at the back of its skull allowed the head to rise and the jaws to lower, giving it an enormously powerful bite. What appear to be teeth are actually sharp, bony plates at the front of its jaw. Royal Tyrrell Museum, Drumheller, Alberta, Canada.

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Keywords: age of fishes, alberta canada, armoured fish, arthrodira, bony plates, canadian museum, devonian period, dinichthyidae, dunkleosteus, dunkleosteus skull, early fish, extinct animal, fish fossil, fossilized bones, mounted specimen, museum display, palaeozoic era, placoderm, placodermi, royal tyrrell museum, zoological, zoology

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