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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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Pleurosigma-delicatulum-LM4-RAI.jpg
Species
Pleurosigma delicatulum
Caption
The raphe angle is quantified as the angle formed between a line placed on top of the raphe at the center of the valve and a line placed on top of the raphe at the apice (Sterrenburg, 2002).
Credit
Lane Allen
