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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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NRSA0151_3a.jpg
Species
Psammothidium semiapertum
Slide Number
ANSP GC112128b
Site ID
ANSP NRSA0151
Name
Unnamed Stream, South Dakota
Caption
Rapheless valve
Coordinates
47.280013, -101.177966
Scalebar = 10 µm
