Compare

Diploneis marginestriata var. minor has a higher stria density and broader longitudinal canals.

LM scalebar = 10 µm
Diploneis marinestriata LM5 Diploneis marinestriata LM1 Diploneis marinestriata LM3 Diploneis marinestriata LM7 Diploneis marinestriata LM6 Diploneis marinestriata LM4 Diploneis marinestriata LM2
Length Range
12.2-23.3 µm
Width Range
6.4-7.4 µm
Striae in 10 µm
18-19

Also compare to

Diploneis marginestriata var. minor

(Hustedt) Suxena and Venkateswarlu