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This species is more linear and narrow than its close ally, G. turgidum.

LM scalebar = 10 µm
Gomphonema Truncatum 001 Gomphonema Truncatum 003 Gomphonema Truncatum 002 Gomphonema Truncatum 005
Length Range
30-60 µm
Width Range
9-10 µm
Striae in 10 µm
10-12

Also compare to

Gomphonema sp.

Ehrenb.