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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
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  • What are diatoms?
Diatoms of North America
Morphological Category
  • Asymmetric Biraphid

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

Characteristics

  • Valves asymmetric to apical axis OR asymmetric to the transapical axis, or both
  • Raphe system well developed
  • Some genera possess apical porefields that secrete mucilaginous stalks
  • Other genera secrete mucilagous tubes

23 Genera

Afrocymbella Iconic

0Afrocymbella

Amphora Iconic 1

7Amphora

Brebissonia Iconic

1Brebissonia

Cymbella Iconic

36Cymbella

Cymbellafalsa iconic2

1Cymbellafalsa

Cymbopleura Iconic

35Cymbopleura

Delicata Iconic

4Delicata

Didymosphenia Iconic

1Didymosphenia

Encyonema Iconic

26Encyonema

Encyonopsis Iconic  Aac

27Encyonopsis

Gomphoneis Iconic

12Gomphoneis

Gomphonella Iconic

3Gomphonella

Gomphonema Iconic

45Gomphonema

Gomphosinica Iconic

1Gomphosinica

Gomphosphenia Iconic

3Gomphosphenia

Halamphora Iconic  Aac

9Halamphora

Kurtkrammeria Iconic

7Kurtkrammeria

Navicymbula Iconic  Aac

1Navicymbula

Oricymba Iconic

0Oricymba

Reimeria Iconic  Aac

3Reimeria

Rhoicosphenia Iconic

3Rhoicosphenia

Seminavis iconic

1Seminavis

Tetramphora iconic

0Tetramphora

Tetramphora iconic

0Tetramphora

Seminavis iconic

1Seminavis

Rhoicosphenia Iconic

3Rhoicosphenia

Reimeria Iconic  Aac

3Reimeria

Oricymba Iconic

0Oricymba

Navicymbula Iconic  Aac

1Navicymbula

Kurtkrammeria Iconic

7Kurtkrammeria

Halamphora Iconic  Aac

9Halamphora

Gomphosphenia Iconic

3Gomphosphenia

Gomphosinica Iconic

1Gomphosinica

Gomphonema Iconic

45Gomphonema

Gomphonella Iconic

3Gomphonella

Gomphoneis Iconic

12Gomphoneis

Encyonopsis Iconic  Aac

27Encyonopsis

Encyonema Iconic

26Encyonema

Didymosphenia Iconic

1Didymosphenia

Delicata Iconic

4Delicata

Cymbopleura Iconic

35Cymbopleura

Cymbellafalsa iconic2

1Cymbellafalsa

Cymbella Iconic

36Cymbella

Brebissonia Iconic

1Brebissonia

Amphora Iconic 1

7Amphora

Afrocymbella Iconic

0Afrocymbella

0Afrocymbella
32Amphora
1Brebissonia
71Cymbella
1Cymbellafalsa
41Cymbopleura
5Delicata
1Didymosphenia
60Encyonema
33Encyonopsis
19Gomphoneis
5Gomphonella
132Gomphonema
2Gomphosinica
6Gomphosphenia
19Halamphora
7Kurtkrammeria
1Navicymbula
0Oricymba
4Reimeria
4Rhoicosphenia
1Seminavis
1Tetramphora
1Tetramphora
1Seminavis
4Rhoicosphenia
4Reimeria
0Oricymba
1Navicymbula
7Kurtkrammeria
19Halamphora
6Gomphosphenia
2Gomphosinica
132Gomphonema
5Gomphonella
19Gomphoneis
33Encyonopsis
60Encyonema
1Didymosphenia
5Delicata
41Cymbopleura
1Cymbellafalsa
71Cymbella
1Brebissonia
32Amphora
0Afrocymbella

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. doi:10.1080/0269249X.2021.2006790

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