Hybodus (`humped tooth`) is an extinct genus of once-common, widespread and long lived sharks, first appearing towards the end of the Permian period, and disappearing during the Late Cretaceous. During the Triassic, Jurassic, and Cretaceous periods the hybodonts were especially successful and could be found in shallow seas across the world. For .....
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http://en.wikipedia.org/wiki/Hybodus
• (n.) An extinct genus of sharks having conical, compressed teeth.
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http://thinkexist.com/dictionary/meaning/hybodus/
Hybodus is a genus of extinct sharks from the Carboniferous period, that lived from the Triassic period until it went extinct during the huge K-T mass extinction 65 million years ago, when the dinosaurs died. This hybodont had fin spines, an anal fin, a blunt snout, and a long body. It had sharp teeth at the front of the jaws (for catching fish) an...
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
Hyb'o·dus noun [ New Latin See
Hybodont .]
(Paleon.) An extinct genus of sharks having conical, compressed teeth.
Found on
http://www.encyclo.co.uk/webster/H/74
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