Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Carinasigma G.Reid, 2012)
Donkinia recta (Donkin) Grunow
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Donkinia J.Ralfs, 1861)
Gyrosigma balticum (Ehrenberg) W. Smith
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Gyrosigma A.H.Hassall, 1845)
Gyrosigma balticum var. turgidum Stidolph 1981
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853)
Gyrosigma balticum var. wansbeckii (Donkin) Heiden
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853)