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Cymbella proxima can be distinguished from C. neocistula by the stockier valve outline and the raphe that is not strongly reverse-lateral in C. proxima. The apices of C. proxima are more narrow and acuminate than in C. proxima f. gravida.

LM scalebar = 10 µm
Cymbella proxima LM6 Cymbella proxima LM5 Cymbella proxima LM2 Cymbella proxima LM4 Cymbella proxima LM1 Cymbella proxima LM3
Length Range
51-104 µm
Width Range
17.8-23.0 µm
Striae in 10 µm
7-8 in the center valve, up to 12 at the ends

Cymbella neocistula

Krammer 2002

Cymbella Neocistula  L 4 33 2 Cymbella Neocistula  L 4 33 1 Cymbella Neocistula  L 4 33 3 Cymbella Neocistula  L 4 33 4 Cymbella Neocistula  L 4 33 6 Cymbella Neocistula  L 4 33 5
Length Range
32-85 µm
Width Range
11-22 µm
Striae in 10 µm
7-10 at valve center, 10-13 near ends