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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
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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

4Delicatophycus

Didymosphenia Iconic

1Didymosphenia

Encyonema Iconic

27Encyonema

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

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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