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Placoderms appeared in the fossil register during the Silurian period, and all placoderms (including the nightmarish Dunkleosteus terrelli) went extinct on the Late Devonian extinction.
On the Carboniferous period there were already no placoderm fishes in the oceans.
This Paleozoic era extinction(s) is not yet fully understood.
However, the extinction of many marine life families in the Devonian/Carboniferous mass extinction, during the Frasnian/Famennian stages and specially the Kellwasser event, was due to the widespread oceanic anoxia.
Few other reliable paleontologic data is known.
What else can I help you with?
What are the comparison between ostracoderms and the placoderms?
They're both extinct bony fishes. The difference is that ostracoderms were jaw-less and placoderms had jaws.
Where did fish come from?
Fish do not come from one source or one event. Early fish were small, jawless species that are now extinct. The first fish with jaws were Placoderms.
What is a sentence with the word extinct?
Why did the dinosaurs go extinct? Humans will never go extinct!
What animal did the jaw evolve from?
placoderms (an ancient jawed fish)
Why did Missouri go extinct?
Missouri is a state - it is not a living thing so it cannot go extinct.
How placoderms feed?
Placoderms, an extinct group of armored fish, primarily fed using a combination of biting and suction. They had robust jaws equipped with sharp, bony plates instead of teeth, which allowed them to grasp and crush their prey. Some species may have also employed suction feeding by rapidly expanding their mouths to draw in smaller prey. Their feeding strategies varied depending on their size and ecological niche, allowing them to exploit a range of food sources in their aquatic environments.
When did wild silk worms go extinct?
They are not extinct...
When did proboscis monkeys go extinct?
they are not extinct yet.
How did the mountain lion go extinct?
It has NEVER been extinct.
What is a chimpanzee expected to go extinct?
They are not expected to become extinct.
What will happen if the Jamaican iguanas go extinct?
if they go extinct then the things that they eat will get over populated.
Why didn't hippos go extinct?
hippos didn't go extinct because they are still producing
