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{{Information |Description={{en|Formation of Auxospores. A. ''Navicula limosa''. B. ''Achnanthes flexella''. C. ''Navicula Amphisbaena''. D. ''Navicula viridis''.}} |Source=Encyclopædia Britannica, 1911 |Author={{Gutenberg|no=32607|name=Encyclopædia Bri
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