placoderm :

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  • n  fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
News & Articles

  • First Jawed Fish Had One Ugly Face
    It's a face only a paleontologist could love. A Chinese team has found a well-preserved fish fossil that, at nearly 420 million years old, is the earliest example of an animal with a modern jaw. The discovery, published in today's Nature, revises the evolutionary path for Earth's earliest vertebrates. An Impressive Jaw Entelgnathus primordialis was an eight-inch-long placoderm — a kind of ...
    Sept. 25, 2013 - Discover

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