Compare

The valves of Fallacia subhamulata are wider and have a lower stria density than F. lenzii.

LM scalebar = 10 µm
Fallacia subhamulata LM4 Fallacia Subhamulata15603B 12032015 04 Cl Fallacia subhamulata LM3 Fallacia subhamulata LM5 Fallacia subhamulata LM2 Fallacia subhamulata LM6 Fallacia subhamulata LM1
Length Range
15.0-17.3 µm
Width Range
5.6-6.0 µm
Striae in 10 µm
28-31

Also compare to

Fallacia lenzii

(Hust.) Lange-Bert. 2004