Cymbopleura edlundii may be distinguished from the several similar forms listed below by its lanceolate shape, very wide axial and central areas and stria count.

LM scalebar = 10 µm
Cymbopleura edlundii LM1 Cymbopleura edlundii LM2 Cymbopleura edlundii LM3 Cymbopleura edlundii LM4 Cymbopleura edlundii LM5 Cymbopleura edlundii LM6 Cymbopleura edlundii LM7
Length Range
51-87 µm
Width Range
14.3-17.9 µm
Striae in 10 µm
9-13 at the valve center, 14-16 near the apices

Cymbopleura rainierensis

(Sovereign) L.L.Bahls 2013

Cymbopleura rainierensis LM7 Cymbopleura rainierensis LM1 Cymbopleura rainierensis LM2 Cymbopleura rainierensis LM3 Cymbopleura rainierensis LM4 Cymbopleura rainierensis LM5 Cymbopleura rainierensis LM6
Length Range
44-82 µm
Width Range
13.2-16.4 µm
Striae in 10 µm
8-11 at the valve center, 13-15 near the apices

Also compare to

Cymbopleura gondwana

Lange-Bert., Krammer and Rumrich 2000

Cymbella laterostrata var. alaskana

R.M.Patrick and Freese 1961

Cymbopleura tynnii

Krammer 2003

Cymbopleura tsoneka

Lange-Bert., Krammer and Rumrich 2000

Cymbopleura laterostrata

(Hust.) Krammer 2003