description Dunkleosteus terrelli Overview
Dunkleosteus terrelli was a large predatory placoderm fish that lived during the Late Devonian Period and is known especially from fossils found in Ohio. Its head and forward trunk were protected by articulated bony plates, while sharpened edges on its jaw plates functioned as cutting surfaces instead of true teeth. Because most of its body was not heavily mineralized and rarely fossilized, estimates of its full length have varied substantially as researchers have reassessed its proportions.
help Dunkleosteus terrelli FAQ
Did Dunkleosteus terrelli have actual teeth?
Dunkleosteus did not use separate teeth like a shark or mammal. Instead, sharpened edges on its bony jaw plates formed powerful cutting surfaces that were repeatedly renewed through wear.
How large was Dunkleosteus terrelli?
Its exact total length remains debated because the armored head is much better preserved than the cartilaginous rear body. Modern reconstructions often make it shorter and deeper-bodied than the very long versions seen in older museum art.
Where have important Dunkleosteus fossils been found?
Many of the best-known Dunkleosteus terrelli fossils come from Late Devonian rocks in Ohio. Cleveland-area shale deposits preserve the heavy skull and thoracic armor especially well.
Was Dunkleosteus a dinosaur or a shark?
It was neither: Dunkleosteus was a placoderm, an extinct group of armored jawed fishes. It lived in Devonian seas more than 100 million years before Tyrannosaurus rex.
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