Tiktaalik k is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the late Devonian period, with many features akin to those of tetrapods (four-legged animals). The Tiktaalik is understood as representative of the evolutionary transition from fish to amphibians. It is an example from several lines of ancient sarcopterygian fish...
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http://en.wikipedia.org/wiki/Tiktaalik
(pronounced ti-SIEN-o-SOOK-us) Tiktaalik roseae meaning large shallow-water fish, in the Inuktikuk language) was an ancient fish that may have been one of the first fish to walk on land using its unusual fins that had wrist joints. Tiktaalik lived about 375 million years ago. Its fossil was found in 2004 by Neil Shubin and others on Ellesmere Islan...
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
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