Compare

Mastogloia albertii is much broader and apices are distinctly rostrate.

LM scalebar = 10 µm
Mastogloia lacustris LM6 Mastogloia lacustris LM7 Mastogloia lacustris LM2 Mastogloia lacustris LM5 Mastogloia lacustris LM1 Mastogloia lacustris LM3 Mastogloia lacustris LM4
Length Range
30-54 µm
Width Range
8-10 µm
Striae in 10 µm
15-17

Mastogloia albertii

Pavlov et al. 2016

Mastogloia albertii LM4 Mastogloia albertii LM5 Mastogloia albertii LM2 Mastogloia albertii LM3 Mastogloia albertii LM6 Mastogloia albertii LM1
Length Range
33-46 µm
Width Range
11-13 µm
Striae in 10 µm
15-18