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Diatoms of the United States is now known as Diatoms of North America.
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Monoraphid

Monoraphid is one of nine morphology categories that we use to provide a visual aid in identification. These categories are artificial (not strictly evolutionary).

Achnanthes
  9  

Achnanthidium
  17  

Cocconeis
  6  

Eucocconeis
  4  

Gliwiczia
  1  

Karayevia
  7  

Lemnicola
  1  

Planothidium
  10  

Platessa
  7  

Psammothidium
  17  

Rossithidium
  5