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The morphology of E. microcephala is most similar to E. trinacria and E. rushforthii. The central undulation on the dorsal margin of E. microcephala is more prominent than the faint hint of a swelling on the dorsal margin of E. microcephala. The two ventral undulations are more prominent on valves of E. microcephala than those on valves of E. trincacria and are not visible on E. rushforthii.

LM scalebar = 10 µm
Eunotia microcephala LM6 Eunotia microcephala LM4 Eunotia microcephala LM5 Eunotia microcephala LM3 Eunotia microcephala LM2 Eunotia microcephala LM7 Eunotia microcephala LM1
Length Range
13-16 µm
Width Range
1.9-2.1 µm
Striae in 10 µm
18-22 in the center valve

Eunotia rushforthii

Furey, Lowe and Johansen 2011

Eunotia rushforthii LM3 Eunotia rushforthii LM4 Eunotia rushforthii LM6 Eunotia rushforthii LM2 Eunotia rushforthii LM5 Eunotia rushforthii LM1 Eunotia rushforthii LM7
Length Range
14-26 µm
Width Range
2.7-3.6 µm
Striae in 10 µm
19-20

Eunotia trinacria

Krasske 1929

Eunotia trinacria LM5 Eunotia trinacria LM6 Eunotia trinacria LM7 Eunotia trinacria LM1 Eunotia trinacria LM4 Eunotia trinacria LM2 Eunotia trinacria LM3
Length Range
8-24 µm
Width Range
1.7-2.6 µm
Striae in 10 µm
17-23 in the center valve