M.H.Hohn and Hellerman 1963
Valves of G. apicatum are much larger than G. consector. Gomphonema parvulum has straight, parallel striae in comparison to the radiate, curved striae of G. consector. Gomphonema exilissimum has a gradually attenuated and acutely rounded headpole.
Ehrenb. 1854
Kutz. 1849
(Grunow) Lange-Bert. and Reichardt 1996