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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
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  • What are diatoms?
Diatoms of North America
Morphological Category
  • Araphid

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

Characteristics

  • Valves with bilateral symmetry (symmetric about a line)
  • Cells lack a raphe system and lack significant motility
  • Rimoportulae (labiate process) may be present

33 Genera

Ardissonea iconic

0Ardissonea

Asterionella Iconic2

2Asterionella

Ctenophora Iconic

1Ctenophora

Cymatosira iconic

0Cymatosira

Diatoma Iconic

5Diatoma

Diprora Iconic

1Diprora

Distrionella Iconic

1Distrionella

Fragilaria

10Fragilaria

Fragilariforma Iconic

8Fragilariforma

Gato iconic

0Gato

Grammatophora iconic

0Grammatophora

Hannaea Iconic

2Hannaea

Licmophora iconic

0Licmophora

Meridion Iconic

5Meridion

Microtabella iconic

0Microtabella

Nanofrustulum iconic

2Nanofrustulum

Neofragilaria iconic

0Neofragilaria

Odontidium Iconic

2Odontidium

Oxyneis Iconic

2Oxyneis

Podocystis iconic

0Podocystis

Pseudostaurosira Iconic

8Pseudostaurosira

Staurosomething Iconic

0Pseudostaurosiropsis

Punctastriata Iconic  Aac

1Punctastriata

Stauroforma Iconic

1Stauroforma

Staurosira Iconic

4Staurosira

Staurosirella Iconic Aac

7Staurosirella

Synedra Iconic

2Synedra

Tabellaria Iconic

2Tabellaria

Tabularia Iconic

1Tabularia

Tetracyclus Iconic

4Tetracyclus

Thalassiosira iconic

0Thalassionema

Tibetiella Iconic

0Tibetiella

Ulnaria Iconic 1

5Ulnaria

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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