Compare Gomphonema elongatum
Gomphonema elongatum is present in the eastern US. It is distinguished from both G. acuminatum and G. coronatum by its more linear outline.
LM scalebar = 10 µm
Length Range
40-105 µm
40-105 µm
Width Range
7-11 µm
7-11 µm
Striae in 10 µm
13-15
13-15
Length Range
19-77 µm
19-77 µm
Width Range
7-12 µm
7-12 µm
Striae in 10 µm
9-12 at the center, 12-14 toward the footpole
9-12 at the center, 12-14 toward the footpole
Length Range
34-108 µm
34-108 µm
Width Range
8-13 µm
8-13 µm
Striae in 10 µm
8-12, approaching 15/10 µm at the footpole
8-12, approaching 15/10 µm at the footpole
