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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
  • Symmetric Biraphid

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

Characteristics

  • Valves with bilateral symmetry (symmetric about a line)
  • Valves symmetric to both apical and transapical axis
  • Raphe system well developed and cells may be highly motile
  • This group has the greatest diversity among the freshwater diatoms

72 Genera

Adlafia Iconic  Aac

3Adlafia

Amicula iconic

1Amicula

Amphipleura Iconic

1Amphipleura

Aneumastus Iconic

5Aneumastus

Anomoeneis Iconic

7Anomoeoneis

Biremis Iconic

2Biremis

Boreozonacola Iconic

2Boreozonacola

Brachysira Iconic

13Brachysira

Brevilinea Iconic

0Brevilinea

Caloneis Iconic

5Caloneis

Capartogramma Iconic

1Capartogramma

Caponea iconic

1Caponea

Cavinula Iconic

11Cavinula

Chamaepinnularia Iconic

7Chamaepinnularia

Climaconeis iconic

0Climaconeis

Cosmioneis Iconic

3Cosmioneis

Craspedostauros Iconic

0Craspedostauros

Craticula Iconic

15Craticula

Decussata Iconic

1Decussata

Diadesmis Iconic

1Diadesmis

Diatomella Iconic

1Diatomella

Dictyoneis iconic

0Dictyoneis

Diploneis Iconic 1

17Diploneis

Envekadea Iconic Aac

3Envekadea

Eolimna Iconic Aac

3Eolimna

Fallacia Iconic

7Fallacia

Fistulifera Iconic

0Fistulifera

Frickea Iconic

1Frickea

Frustulia Iconic

18Frustulia

Geissleria Iconic

8Geissleria

Genkalia Iconic

1Genkalia

Gyrosigma Iconic

4Gyrosigma

Haslea Iconic

0Haslea

Hippodonta Iconic

6Hippodonta

Humidophila Iconic

5Humidophila

Hygropetra Iconic

1Hygropetra

Kobayasiella Iconic

6Kobayasiella

Kraskella Iconic

1Krasskella

Lacustriella Iconic

1Lacustriella

Luticola Iconic

8Luticola

Lyrella iconic

0Lyrella

Mastogloia Iconic

11Mastogloia

Mayamaea Iconic

2Mayamaea

Microcostatus Iconic Aac

1Microcostatus

Microfissurata Iconic

0Microfissurata

Muelleria Iconic

4Muelleria

Navicula Iconic

83Navicula

Neidiomorpha Iconic

1Neidiomorpha

Neidiopsis Iconic

4Neidiopsis

Neidium Iconic

14Neidium

Ninastrelnikovia iconic

1Ninastrelnikovia

Nupela Iconic

16Nupela

Parlibellus Iconic

0Parlibellus

Petroneis iconic

0Petroneis

Pinnularia Iconic

65Pinnularia

Pinnunavis iconic

1Pinnunavis

Placoneis Iconic

5Placoneis

Plagiotropis Iconic

2Plagiotropis

Playaensis Iconic

1Playaensis

Pleurosigma2 Iconic

2Pleurosigma

Plumosigma iconic

0Plumosigma

Prestauroneis Iconic

2Prestauroneis

Proschkinia Iconic

1Proschkinia

Pseudofallacia Iconic Ac

1Pseudofallacia

Pseudogomphonema iconic

0Pseudogomphonema

Pulchellophycus iconic

1Pulchellophycus

Rexlowea Iconic

1Rexlowea

Scoliopleura Iconic

1Scoliopleura

Sellaphora Iconic

25Sellaphora

Stauroneis Iconic

53Stauroneis

Staurophora Iconic

6Staurophora

Tursiocola iconic

0Tursiocola

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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