The highly arched dorsal margin and irregular shortened striae of E. bilii valves distinguish it from E. hexaglyphis. The absence of fine radiate striae near the ends in E. bilii distinguish it from E. subpolyglyphus.

LM scalebar = 10 µm
Eunotia bilii LM6 Eunotia bilii LM3 Eunotia bilii LM7 Eunotia bilii LM2 Eunotia bilii LM5 Eunotia bilii LM4 Eunotia bilii LM1
Length Range
29-50 µm
Width Range
10-13 µm
Striae in 10 µm
7-10 in the center valve, 10-16 at the ends

Eunotia hexaglyphis

Ehrenb. 1854

Eunotia Hex1 New Eunotia Hex2 Eunotia Hex3  New Eunotia Hex4 Eunotia Hex5 Eunotia Hex6 Eunotia Hex7
Length Range
27.1-48.9 µm
Width Range
8.6-12.3 µm
Striae in 10 µm

Also compare to

Eunotia subpolyglyphis