Diploneis submarginestriata is very similar in shape, but differs in width (6.2-7.4 µm) and stria density (18-20 in 10 µm). Diploneis marginestriata is also similar, and is distinguished by wider valves (8–11 μm) and a lower stria density (17–18). The longitudinal canal of D. marginestriata also is slightly wider.

LM scalebar = 10 µm
Diploneis galloprovincialis LM1 Diploneis galloprovincialis LM5 Diploneis galloprovincialis LM2 Diploneis galloprovincialis LM3 Diploneis galloprovincialis LM4
Length Range
20.5-36.0 µm
Width Range
7.5-8.0 µm
Striae in 10 µm

Diploneis submarginestriata

Jovanovska, Lange-Bert. and Levkov 2020

Diploneis submarginestriata LM5 Diploneis submarginestriata LM3 Diploneis submarginestriata LM4
Length Range
12.2-23.3 µm
Width Range
6.2-7.4 µm
Striae in 10 µm

Also compare to

Diploneis marginestriata