Diatoms of North AmericaDiatoms of North America
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Compare Navicula viridulacalcis subsp. neomundana

Lange-Bert. and Rumrich in Rumrich, Lange-Bert. and Rumrich 2000

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Navicula viridulacalcis subsp. neomundana differs from N. viridula by the linear valves with distinctly wedge-shaped apices. N. slesvicensis has a symmetrical central nodule, straight proximal raphe ends, and lanceolate valve shape. N. rostellata is smaller and has higher striae density. The nominate variety N. viridulacalcis subsp. viridulacalcis has more narrow valves with less abruptly cuneate apices, but its occurrence in North America has not been confirmed.

LM scalebar = 10 µm
Gs020273 1 Gs020273 6 Gs020273 12 Gs020273 10 Gs020273 5 Gs020273 7 Gs020273 2
Length Range
45-68 µm
Width Range
10.0-12.2 µm
Striae in 10 µm
8-9

Navicula rostellata

Kütz. 1844

Gs113649 1 Gsn24379 07 Gsn24379 05 Navicula rostellata LM6 Navicula rostellata LM1 Gsn24379 03 Gsn24379 06
Length Range
32-41 µm
Width Range
8.0-9.1 µm
Striae in 10 µm
12-14

Navicula viridula

(Kütz.) Ehrenb. 1836

Gc107320 Gs141643 Naviridulacal4 Gc107320 Gs141643 Naviridulacal1 Gc107320 Gs141643 Naviridulacal7 Gc107320 Gs141643 Naviridulacal6 Gc107320 Gs141643 Naviridulacal5 Gc107320 Gs141643 Naviridulacal2 Gc107320 Gs141643 Naviridulacal3
Length Range
50-70 µm
Width Range
11.2-13.5 µm
Striae in 10 µm
8-9

Navicula slesvicensis

Grunow in Van Heurck 1880

Navicula slesvicensis LM7 Navicula slesvicensis LM6 Navicula slesvicensis LM5 Navicula slesvicensis LM4 Navicula slesvicensis LM3 Navicula slesvicensis LM2 Navicula slesvicensis LM1
Length Range
36-69 µm
Width Range
10-12.5 µm
Striae in 10 µm
8-9

Also compare to

Navicula viridulacalcis subsp. viridulacalcis

Lange-Bert. in Rumrich et al.