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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
    • Nitzschioid
    • Surirelloid
  • Genera
  • Species
  • Glossary
  • About Us
    • News
    • Projects
    • Review Board
    • Taxon Contributors
    • Contact Us
  • 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

13 Genera

Achnanthes Iconic

8Achnanthes

Achnanthidium Iconic

19Achnanthidium

Anorthoneis Iconic

0Anorthoneis

Cocconeis Iconic

8Cocconeis

Eucocconeis Iconic

5Eucocconeis

Gliwiczia Iconic

1Gliwiczia

Karayevia Iconic

6Karayevia

Lemnicola Iconic

1Lemnicola

Planothidium Iconic

15Planothidium

Platessa Iconic

8Platessa

Psammothidium Iconic

19Psammothidium

Rossithidium Iconic

4Rossithidium

Skabitschewskia Iconic

2Skabitschewskia

Skabitschewskia Iconic

2Skabitschewskia

Rossithidium Iconic

4Rossithidium

Psammothidium Iconic

19Psammothidium

Platessa Iconic

8Platessa

Planothidium Iconic

15Planothidium

Lemnicola Iconic

1Lemnicola

Karayevia Iconic

6Karayevia

Gliwiczia Iconic

1Gliwiczia

Eucocconeis Iconic

5Eucocconeis

Cocconeis Iconic

8Cocconeis

Anorthoneis Iconic

0Anorthoneis

Achnanthidium Iconic

19Achnanthidium

Achnanthes Iconic

8Achnanthes

24Achnanthes
37Achnanthidium
1Anorthoneis
14Cocconeis
6Eucocconeis
1Gliwiczia
12Karayevia
1Lemnicola
37Planothidium
11Platessa
30Psammothidium
6Rossithidium
2Skabitschewskia
2Skabitschewskia
6Rossithidium
30Psammothidium
11Platessa
37Planothidium
1Lemnicola
12Karayevia
1Gliwiczia
6Eucocconeis
14Cocconeis
1Anorthoneis
37Achnanthidium
24Achnanthes

Diatoms of North America

The source for diatom identification and ecology

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