Foged 1963
Gomphoneis pseudo-okunoi is very similar to this taxon, and may prove to be conspecific. Gomphonema olivaceoides has a lower stria density. Gomphonema olivaceoides var. hutchinsoniana has as lower stria density and capitate head- and footpoles.
Patrick 1971
Tuji 2005
(Hust.) J.R.Carter ex A.Tuji