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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
Projects
Review Board
Taxon Contributors
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What are diatoms?
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Achnanthidium-thienemannii-SEM2.jpg
Species
Achnanthidium thienemannii
Site ID
Station 101
Name
Driftwood, rock scrapings from pool, Alaska
Caption
External view of raphe valve
Scalebar = 5 µm
