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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
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Mission
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What are diatoms?
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IMG_4942-1-1.JPG
Glossary Term
Hemivalve
Caption
Red line along the axis of this valve of
Pseudo-nitzschia
separates the two hemivalves. White arrow marks the raphe. The raphe side is the major hemivalve. Scale bar = 10 µm.
Credit
Rob Kimmich
