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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
Species
Glossary
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What are diatoms?
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original-tetracyclus-drawings.jpg
Species
Tetracyclus emarginatus
Caption
Original Hand drawing of Tetracyclus emarginatus by Ehrenberg in Schmidts Atlas
