Diatoms of North AmericaDiatoms of North America
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Compare Cymbella fontinalis

Bahls 2018

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Cymbella compacta and Cymbella lange-bertalotii have filiform proximal raphe ends, parallel striae or slightly radiate near the apices, and small areolae-like stigmata located at the end median ventral striae. Cymbella neocistula, C. neocistula var. islandica, C. blinnii and other species in the Cymbella neocistula complex have more dorsiventral valves and concave ventral margins with a tumid middle.

LM scalebar = 10 µm
Cymbella Fontinalis LM1 Cymbella Fontinalis LM2 Cymbella Fontinalis LM3 Cymbella Fontinalis LM4 Cymbella Fontinalis LM5 Cymbella Fontinalis LM6 Cymbella Fontinalis LM7
Length Range
38-98 µm
Width Range
11-16 µm
Striae in 10 µm
8-13

Cymbella compacta

Østrup 1910

Cymbella Compacta1 Cymbella Compacta2 Cymbella Compacta3 Cymbella Compacta4 Cymbella Compacta5 Cymbella Compacta6 Cymbella Compacta7
Length Range
45.6-78.3 µm
Width Range
11.4-15.3 µm
Striae in 10 µm
9-11

Cymbella neocistula

Krammer 2002

Cymbella Neocistula L 4 33 2 Cymbella Neocistula L 4 33 1 Cymbella Neocistula L 4 33 3 Cymbella Neocistula L 4 33 4 Cymbella Neocistula L 4 33 6 Cymbella Neocistula L 4 33 5
Length Range
32-85 µm
Width Range
11-22 µm
Striae in 10 µm
7-10 at valve center, 10-13 near ends

Cymbella neocistula var. islandica

Krammer 2002

Cymbella Neocistula Islandica1 Cymbella Neocistula Islandica2 Cymbella Neocistula Islandica3 Cymbella Neocistula Islandica4 Cymbella Neocistula Islandica5 Cymbella Neocistula Islandica6 Cymbella Neocistula Islandica7
Length Range
44-109 µm
Width Range
13.5-26.0 µm
Striae in 10 µm
8-11

Cymbella blinnii

Bahls 2014

Cymbella Blinnii1 Cymbella Sp 493501 2 Cymbella Blinnii3 Cymbella Blinnii4 Cymbella Blinnii5 Cymbella Blinnii6 Cymbella Blinnii7
Length Range
22.4-54.4 µm
Width Range
7.6-11.4 µm
Striae in 10 µm
10-14 at the valve center, 14-15 near the apices

Also compare to

Cymbella lange-bertalotii

Krammer