Diatoms of North AmericaDiatoms of North America
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Compare Nitzschia palea var. debilis

(Kütz.) Grunow in Cleve and Grunow 1880

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Nitzschia palea var. debilis is proportionately more slender and has finer fibulae, as distinct from the nominate taxon. This taxon also has a more rounded, rather than subcapitate headpole, as compared to N. palea var. palea and N. palea var. tenuirostris.

LM scalebar = 10 µm
Debilis 005 Debilis 004 Debilis 003 Debilis 001 Debilis 002
Length Range
20-30 µm
Width Range
2.5-3.0 µm
Striae in 10 µm
Striae not visible with LM

Nitzschia palea

(Kütz.) W.Sm. 1856

Nitzschia palea LM4 Nitzschia palea LM5 Nitzschia palea LM7 Nitzschia palea LM6 Nitzschia palea LM2 Nitzschia palea LM3 Nitzschia palea LM1
Length Range
12-42 µm
Width Range
3-4 µm
Striae in 10 µm
36-38

Nitzschia palea var. tenuirostris

Grunow in Van Heurck 1881

Nitzschia palea var tenuirostris LM3 Nitzschia palea var tenuirostris LM5 Nitzschia palea var tenuirostris LM1 Nitzschia palea var tenuirostris LM4 Nitzschia palea var tenuirostris LM2
Length Range
20-36 µm
Width Range
2.5-3.5 µm
Striae in 10 µm
difficult to resolve in LM