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Diatoms of North AmericaDiatoms of North America
Diatoms of North America
  • Practitioners
  • Morphology
    • Centric
    • Araphid
    • Eunotioid
    • Symmetric Biraphid
    • Monoraphid
    • Asymmetric Biraphid
    • Epithemioid
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  • What are diatoms?
Diatoms of North America
Morphological Category
  • Monoraphid

    • Centric
    • Araphid
    • Eunotioid
    • Symmetric Biraphid
    • Monoraphid
    • Asymmetric Biraphid
    • Epithemioid
    • Nitzschioid
    • Surirelloid

Characteristics

  • Valves with bilateral symmetry (symmetric about a line)
  • Raphe system present on one valve (raphe valve)
  • Raphe system absent on one valve (rapheless valve)
  • Heterovalvar ornamentation

17 Genera

Achnanthes Iconic

7Achnanthes

Achnanthidium Iconic

17Achnanthidium

Anorthoneis Iconic

0Anorthoneis

Bennetella iconic

0Bennettella

Cocconeis Iconic

11Cocconeis

Crenotia iconic

0Crenotia

Epipellis iconic

0Epipellis

Eucocconeis Iconic

5Eucocconeis

Gliwiczia Iconic

1Gliwiczia

Gogorevia iconic

2Gogorevia

Karayevia Iconic

6Karayevia

Lemnicola Iconic

1Lemnicola

Planothidium Iconic

15Planothidium

Platessa Iconic

8Platessa

Psammothidium Iconic

20Psammothidium

Rossithidium Iconic

5Rossithidium

Skabitschewskia Iconic

2Skabitschewskia

Diatoms of North America

The source for diatom identification and ecology

Cite as: Spaulding et al. 2021. Diatoms.org: supporting taxonomists, connecting communities. Diatom Research 36(4): 291-304. https://doi.org/10.1080/0269249X.2021.2006790

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