Diatoms of North AmericaDiatoms of North America
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Compare Diploneis potapovae

Lange-Bert., Fuhrmann and Cantonati 2020

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Diploneis boldtiana is similar in outline, but has biseriate striae. Diploneis calcicolafrequens has oblong to oblong-elliptic valves and a lower stria density. Also compare to Diploneis oblongellopsis (a name that has replaced D. oblongella), which is superficially similar. Both D. fontanella and D. separanda are smaller and more narrow.

LM scalebar = 10 µm
Diploneis potapovae LM1 Diploneis potapovae LM8 Diploneis potapovae LM3 Diploneis potapovae LM4 Diploneis potapovae LM7
Length Range
15-24.5 µm
Width Range
8.3-9.0 µm
Striae in 10 µm
15-17

Diploneis boldtiana

Cleve 1891

Diploneis boldtiana LM1 Diploneis boldtiana LM2 Diploneis boldtiana LM3 Diploneis boldtiana LM4 Diploneis Boldtiana LM5 Diploneis boldtiana LM6
Length Range
17.5–37.5 µm
Width Range
10-11.5 µm
Striae in 10 µm
14-15

Diploneis calcicolafrequens

Lange-Bert. and Fuhrmann 2020

Diploneis calcicolafrequens LM1 Diploneis calcicolafrequens LM2 Diploneis calcicolafrequens LM3 Diploneis calcicolafrequens LM4 Diploneis calcicolafrequens LM5 Diploneis calcicolafrequens LM6 Diploneis calcicolafrequens LM8
Length Range
14.6-28.9 µm
Width Range
8.4-11 µm
Striae in 10 µm
11-14

Also compare to

Diploneis fontanella

Lange-Bert.