Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Cyclotella (F.T.Kützing) A.de Brébisson, 1838)
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Mesodictyopsis Khursevich, Iwashita, Kociolek & Fedenya, 2004)
Stephanodiscus armenicus Lupikina & Ozornina 1991
Doubtful according to GBIF classification (Possible variant of Stephanodiscus armenicus Khursevich & Pirumova, 1988)
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Stephanodiscus astraea (Ehrenb.) Grunow)
Stephanodiscus astraea var. minutulus (Kütz.) Grunow
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Stephanodiscus astraea (Ehrenb.) Grunow)
Stephanodiscus astraea var. niagarae (Ehrenberg) Cleve-Euler 1951
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Stephanodiscus niagarae var. niagarae)
Stephanodiscus bellus var. novaezeelandiae (Cleve) Grunow 1882
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Stephanodiscus bellus Khursevich & Loginova, 1990)