- Bacillariophyta
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- Bacillariophyceae
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- Achnanthales
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- Cocconeidaceae
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- Cocconeis
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- Cocconeis costata
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- Cocconeis costata var. hexagona
Cocconeis costata var. hexagona
Grunow in Van Heurck
- Omnidia : COCH
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