Gomphonema coronatum is longer, and proportionately more slender than G. acuminatum, with which it was for many years considered part of that species complex. Gomphonema coronatum is more curved and broader near the headpole than G. elongatum.
LM scalebar = 10 µm
Length Range
34-108 µm
Width Range
8-13 µm
Striae in 10 µm
8-12, approaching 15/10 µm at the footpole