Compare Gomphonema apicatum
Compare
Gomphonema apicatum is more apiculate, and broader than either G. acuminatum or G. coronatum, two taxa with which it has been confused.
LM scalebar = 10 µm
Length Range
40-53 µm
40-53 µm
Width Range
13-15 (as measured at the broadest portion of the valve) µm
13-15 (as measured at the broadest portion of the valve) µm
Striae in 10 µm
9-11
9-11
Gomphonema acuminatum
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 towards the footpole
9-12 at the center, 12-14 towards the footpole
Gomphonema coronatum
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