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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
Species
Glossary
About Us
News
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What are diatoms?
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Rhopalodia_2.jpg
Glossary Term
Keel
Caption
A scanning electron micrograph of a frustule of
Rhopalodia
. The keel of each valve is indicated by an arrow. The raphe is visible as a faint line along the edge of each keel.
Credit
Ditmar Metzeltin, Marina Potapova, Pat Kociolek
