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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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Glossary
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What are diatoms?
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A_nivalis_collum.jpg
Glossary Term
Collum
Caption
A scanning electron micrograph of a single valve of
A. nivalis
, showing the collum.
Credit
Marina Potapova
