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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
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What are diatoms?
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pervalvar.jpg
Glossary Term
Pervalvar axis
Caption
The pervalvar axis of
Stephanodiscus yellowstonensis
is indicated by the black line.
Credit
Marina Potapova
