Diatoms of North AmericaDiatoms of North America
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Compare Navicula viridula

(Kütz.) Ehrenb. 1836

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Navicula viridula differs from N. viridulacalcis subsp. neomundana the most similar species, by lanceolate valves with distinctly subrostrate apices. Navicula slesvicensis has a symmetric central nodule and straight proximal raphe ends.

LM scalebar = 10 µm
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 viridulacalcis subsp. neomundana

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

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 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