
Amphiesma is a genus of colubrid snakes, commonly known as keelbacks because of their keeled dorsal scales. They are all nonvenomous. ==Geographic range== Amphiesma species occur in southern and eastern Asia, including Siberia, Korea, China, the Indian subcontinent, Indochina, Southeast Asia, Japan, and Indonesia. The following 42 species are reco...
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http://en.wikipedia.org/wiki/Amphiesma

The outer covering of a dinoflagellate, consisting of several membrane layers.
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http://www.ucmp.berkeley.edu/glossary/glossary_4.html
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