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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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Cyclostephanos_tholiformis1.jpg
Species
Cyclostephanos tholiformis
Caption
Distribution of
Cyclostephanos tholiformis
in rivers of the continental U.S. based on the National Water Quality Assessment program. Retrieved 03 June 2015.
Credit
USGS BioData
