Cuneolus skvortzowii (Nikolajev) Medlin in Medlin & Round, 1986 accepted as
Gomphonema skvortzowii Nikolaev, 1970 (new combination reference)
Gomphonemopsis L. Medlin in L. Medlin & F.E. Round, 1986 (original description)
Gomphonemopsis exigua (Kützing) Medlin in Medlin & Round, 1986 (new combination reference)
Gomphonemopsis littoralis (Hendey) Medlin in Medlin & Round, 1986 accepted as
Gomphonema littorale Hendey, 1977 (new combination reference)
Gomphonemopsis pseudexigua (Simonsen) Medlin in Medlin & Round, 1986 accepted as
Gomphonema pseudoexiguum Simonsen, 1959 (new combination reference)
Gomphoseptatum L. Medlin in L. Medlin & F.E. Round, 1986 (original description)
Gomphoseptatum aestuarii (Cleve) Medlin in Medlin & Round, 1986 accepted as
Gomphonema aestuarii Cleve, 1893 (new combination reference)
Pseudogomphonema L.K. Medlin in L.K. Medlin & F.E. Round, 1986 (original description)
Pseudogomphonema arcticum (Grunow) L.K.Medlin, 1986 accepted as
Gomphonema arcticum Grunow, 1880 (new combination reference)
Pseudogomphonema groenlandicum (Østrup) L.K.Medlin, 1986 accepted as
Gomphonema groenlandicum var. groenlandicum Østrup, 1895 (new combination reference)
Pseudogomphonema kamtschaticum (Grunow) L.K.Medlin, 1986 accepted as
Gomphonema kamtschaticum var. kamtschaticum Grunow, 1878 (new combination reference)
Pseudogomphonema septentrionale (Østrup) L.K.Medlin, 1986 accepted as
Gomphonema septentrionale var. septentrionale Østrup, 1895 (new combination reference)
Pseudogomphonema septentrionale var. angustum (Østrup) Medlin in Medlin & Round, 1986 accepted as
Gomphonema septentrionale var. angusta Østrup, 1895 (new combination reference)