Goniatids, informally Goniatites, are ammonoid cephalopods that form the Order Goniatiida, derived from the more primitive Anarcestida during the Middle Devonian some 390 million years ago. Goniatites (goniatitida) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permia...
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http://en.wikipedia.org/wiki/Goniatite
• (n.) One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.
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http://thinkexist.com/dictionary/meaning/goniatite/
(from the article `Devonian Period`) ...patterns where they join the outer shell. The complexity of these suture patterns culminated in the ammonites of the Mesozoic Era. From their ...
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http://www.britannica.com/eb/a-z/g/48
Go'ni·a·tite noun [ Greek ... angle.]
(Paleon.) One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.
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http://www.encyclo.co.uk/webster/G/43
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