Compare Nitzschia serpentiraphe
Nitzschia amphibia var. frauenfeldii has finer striae and fibulae. Denticula kuetzingii and Denticula kuetzingii var. rumrichae have valves that are more linear and not constricted in the center. In addition, Denticula kuetzingii has higher stria density (13-20 in 10µm) and fibula density (5-8 10 µm). Denticula kuetzingii var. rumrichae overlaps in length, but has a differing fibula structure.
LM scalebar = 10 µm
Length Range
56-105 µm
56-105 µm
Width Range
6.2-8.1 µm
6.2-8.1 µm
Striae in 10 µm
11-12
11-12
Length Range
20.5-28.3 µm
20.5-28.3 µm
Width Range
4.5-5.7 µm
4.5-5.7 µm
Striae in 10 µm
17-19
17-19
Also compare to
Denticula kuetzingii var. rumrichae
BioData Reference
Krammer and Lange-Bertalot 2/2 Pl 100 Fig 18-22
Nitzschia amphibia fo. frauenfeldii
BioData Reference
Krammer and Lange-Bertalot 2/2 Pl 78 Fig 25-26