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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
  • Nitzschioid

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

Characteristics

  • Valves with bilateral symmetry (symmetric about a line)
  • Valves usually symmetric to both apical and transapical axes
  • Raphe system well developed and enclosed within a canal
  • Raphe system usually positioned near one valve margin
  • Raphe sometimes raised within keel

12 Genera

Bacillaria Iconic

1Bacillaria

Cylindrotheca Iconic

1Cylindrotheca

Cymbellonitzschia Iconic

1Cymbellonitzschia

Denticula Iconic

4Denticula

Grunowia Iconic

3Grunowia

Hantzschia Iconic

1Hantzschia

Homoeocladia iconic

0Homoeocladia

Nitzschia Iconic

43Nitzschia

Psammodictyon Iconic2

0Psammodictyon

Pseudo nitzschia iconic

0Pseudo-nitzschia

Simonsenia Iconic

1Simonsenia

Tryblionella Iconic

9Tryblionella

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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