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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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Ulnaria_acus1.jpg
Species
Ulnaria sp. IT ILL 2015
Caption
Distribution of
Ulnaria acus
in rivers of the continental U.S. based on the National Water Quality Assessment program. Retrieved 03 June 2015.
Credit
USGS BioData
