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)
Gyrosigma macrum (W. Sm.) Cl.
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Gyrosigma A.H.Hassall, 1845)
Gyrosigma strigilis (W. Smith) J. W. Griffin & Henfrey 1856
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma strigilis f. strigilis)
Pleurosigma balticum var. wansbeckii (Donkin) Van Heurck 1896
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma wansbeckii f. wansbeckii)
Pleurosigma distortum W. Smith 1852
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma distortum var. distortum)
Pleurosigma littorale W. Smith 1852
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma littorale var. littorale)
Pleurosigma macrum W. Smith 1853
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Pleurosigma W.Smith, 1852)
Pleurosigma obtusatum W. S. Sullivant & Wormley 1859
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Pleurosigma W.Smith, 1852)
Pleurosigma rectum Donkin 1858
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Pleurosigma W.Smith, 1852)
Pleurosigma spencerii var. exilis Grunow 1880
Homotypic synonym according to GBIF classification (Originally found in sources as doubtful taxon within Gyrosigma acuminatum (Kutz.) Rabenh.)
Pleurosigma strigilis W. Smith 1852
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma strigilis f. strigilis)
Pleurosigma tenuissimum W. Smith 1853
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma tenuissimum var. tenuissimum)
Scalptrum distortum (W. Smith) Kuntze 1891
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma distortum var. distortum)
Scalptrum tenuissimum (W. Smith) Kuntze 1891
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma tenuissimum var. tenuissimum)
Scalptrum wansbeckii (Donkin) Kuntze 1891
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pleurosigma wansbeckii f. wansbeckii)
? balticum Ehrenberg
Homotypic synonym according to GBIF classification (Originally found in sources as doubtful taxon within Pleurosigmataceae)
