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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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What are diatoms?
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P_curtissimum_rapheless.jpg
Glossary Term
Rapheless valve
Caption
Psammothidium curtissimum
is a monoraphid diatom. Here, the rapheless valve and raphe valve of a single frustule are shown together.
Credit
Marina Potapova
