Guide to Gomphonema marriae
- Headpole narrow, distinct
- Apices pronounced
- Median stria with isolated stigmoid
- Raphe lateral to undulate
- Terminal raphe fissures deflected opposite stigmoid
Apices are narrow and slightly undulate near the headpole. The headpole terminates in a narrow and pronounced apex. A stigmoid is present near an “off-center”, shortened, median stria. The raphe is lateral to undulate. Terminal raphe fissures are deflected away from the stigmoid.