Cymbopleura citris is relatively more broad with subrostrate ends. Encyonema hamsherae has somewhat capitate apices that are oriented toward the ventral margin and proximal raphe ends that are deflected dorsally.

LM scalebar = 10 µm
Cymbella designata LM1 Cymbella designata LM2 Cymbella designata LM3 Cymbella designata LM4 Cymbella designata LM5 Cymbella designata LM6
Length Range
26.2-37.2 µm
Width Range
9.0-11.6 µm
Striae in 10 µm
12-14 in the valve center, up to 18 near the apices

Encyonema hamsherae

Winter and Bahls 2013

Encyonema hamsherae LM1 Encyonema hamsherae LM3 Encyonema hamsherae LM6 Encyonema hamsherae LM6 Encyonema hamsherae LM9 Encyonema hamsherae LM12
Length Range
19-30 µm
Width Range
6.5-7.5 µm
Striae in 10 µm
16-18 in middle of dorsal side, 15-18 in middle of ventral side

Also compare to

Cymbopleura citrus

(Carter and Bailey-Watts) Krammer 2003