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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
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What are diatoms?
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STmedius1a.jpg
Species
Stephanodiscus medius
Caption
Distribution of
Stephanodiscus medius
in continental U.S. rivers in the National Water Quality Assessment program. Retrieved 11 June 2015.
Credit
USGS BioData
