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Bacillariophyceae
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Canada
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Chromista
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Cymatopleura
Cymatopleura apiculata
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Cymbella
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Cymbella designata
Cymbellaceae
Cymbellales
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North America
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Ochrophyta
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Rocky Mountains
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Surirellaceae
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Surirellales
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biogeography
diatoms
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ecology
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floristics
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taiga
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tundra
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