Gomphonema acuminatum is larger - and frequently confused with this taxon.

Gomphonema brebissonii is more narrow near the headpole.

LM scalebar = 10 µm
Length Range
32-56 µm
Width Range
6.5-9.0 µm
Striae in 10 µm
11-13
Gomphonema pusillum LM4
Gomphonema pusillum LM7
Gomphonema pusillum LM5
Gomphonema pusillum LM6
Gomphonema pusillum LM3
Gomphonema pusillum LM1
Gomphonema pusillum LM2
Gomphonema pusillum LM4 Gomphonema pusillum LM7 Gomphonema pusillum LM5 Gomphonema pusillum LM6 Gomphonema pusillum LM3 Gomphonema pusillum LM1 Gomphonema pusillum LM2
Length Range
19-77 µm
Width Range
7-12 µm
Striae in 10 µm
9-12 at the center, 12-14 toward the footpole
Gomphonema Acuminatum 002 Gomphonema Acuminatum 001 Gomphonema Acuminatum 003 Gomphonema Acuminatum 005 Acuminatum Gc109928B004 Gomphonema Acuminatum 004
Length Range
17-48 µm
Width Range
6-9 µm
Striae in 10 µm
9-12
Brebissonii Gc8988B005 Brebissonii Gc113636B007 Brebissonii Gc8988B002 Brebissonii Gc8988B003 Brebissonii Gc113636B001B Brebissonii Gc113636B002 Brebissonii Gc113636B003