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Proschkinia bulnheimii has a lower stria density (~22 in 10 ┬Ám) and a linear lanceolate valve outline. The striae along the entire length of the valves are resolvable in LM, and are nearly parallel throughout. The internal opening of the fistula is located at the junction of the axial rib and the internal valve face (SEM).

LM scalebar = 10 µm
Proschkinia Browderiana Lm6 Proschkinia Browderiana Lm5 Proschkinia Browderiana Lm4 Proschkinia Browderiana Lm3 Proschkinia Browderiana Lm1 Proschkinia Browderiana Lm2
Length Range
18.0-31.5 µm
Width Range
2.5-5.0 µm
Striae in 10 µm
30-45

Also compare to

Proschinia bulnheimii

(Grunow) Karaeva