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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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Planothidum_ringed_dep.jpg
Glossary Term
Rimmed depression
Caption
A scanning electron micrograph of the inside of the rapheless valve of a species of
Planothidium
. The arrow indicates the rimmed depression.
Credit
Marina Potapova
