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Diploneis potapovae has uniseriate striae. Diploneis modica has biseriate striae, but smaller valve size and higher striae density. Diploneis modicahassiaca and Diploneis balticanova have biseriate striae that become triseriate close to the valve margin and onto the mantle. To date, Diploneis modicahassiaca is only known from Germany, Diploneis modica from Lake Ohrid (North Macedonia/Albania), and Diploneis balticanova from Stettin Lagoon in Poland.

LM scalebar = 10 µm
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 potapovae

Lange-Bert., Fuhrmann and Cantonati 2020

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

Also compare to

Diploneis modicahassiaca

Lange-Bert. and Fuhrmann

Diploneis modica

Hust.

Diploneis balticanova

Lange-Bert. and Fuhrmann