Compare Cylindrotheca gracilis
The cells of Cylindrotheca closterium are lanceolate, with long, thin, flexible apices. The valves are not twisted. Cylindrotheca closterium is primarily a marine taxon.
While Nitzschia acicularis and N. draveillensis are also narrow and elongate, the valves are not twisted.
LM scalebar = 10 µm
Length Range
64-148 µm
64-148 µm
Width Range
2.8-7.9 µm
2.8-7.9 µm
Length Range
30.0-100.0 µm
30.0-100.0 µm
Width Range
3.0-4.0 µm
3.0-4.0 µm
Also compare to
Cylindrotheca closterium
BioData Reference
Krammer and Lange-Bertalot 2/2 Pl 87 Fig 1-2
Nitzschia draveillensis
BioData Reference
Krammer and Lange-Bertalot 2/2 Pl 85 Fig 5-6