Compare

Valves of N. dissipata are smaller than those of N. dissipata var. media and N. recta. In addition, the raphe of N. dissipata is more eccentric than the centrally placed raphe of N. dissipata var. media and N. recta. The valve surface of N. dissipata is raised compared to the flat valve face of N. recta.

LM scalebar = 10 µm
Nitzschia dissipata LM6 Nitzschia dissipata LM2 Nitzschia dissipata LM4 Nitzschia dissipata LM3 Nitzschia dissipata LM5 Nitzschia dissipata LM1
Length Range
11.9-72 µm
Width Range
2.9-8 µm
Striae in 10 µm
32-50

Nitzschia recta

Hantzsch ex Rabenh. 1862

Nitzschia recta LM7 Nitzschia recta LM5 Nitzschia recta LM6 Nitzschia recta LM3 Nitzschia recta LM8
Length Range
48-85 µm
Width Range
4.7-7 µm
Striae in 10 µm
39-50

Also compare to

Nitzschia dissipata var. media

(Hantzsch) Grunow

BioData Reference
Krammer and Lange-Bertalot 2/2 Pl 11 Fig 8-14

Nitzschia dissipata var. media

(Hantzsch) Grunow in Van Heurck