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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
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What are diatoms?
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hannaea_007.jpg
Glossary Term
Arcuate
Caption
Valves of
Hannaea arcus
have an arcuate valve margin.
