Ankistrodesmus falcatus (Corda) Ralfs, 1848 (basis of record)
Asterionella formosa Hassall, 1850 (basis of record)
Asterionella glacialis Castracane, 1886 (basis of record)
Asterionella kariana Grunow, 1880 (basis of record)
Aulacoseira ambigua (Grunow) Simonsen, 1979 (basis of record)
Aulacoseira granulata (Ehrenberg) Simonsen, 1979 (basis of record)
Biddulphia mobiliensis (J.W.Bailey) Grunow, 1882 accepted as Trieres mobiliensis (J.W.Bailey) Ashworth & E.C.Theriot in Ashworth, Nakov & E.C.Theiriot, 2013 (basis of record)
Biddulphia sinensis Greville, 1866 (basis of record)
Chaetoceros mitra (Bailey) Cleve, 1896 accepted as Dicladia mitra J.W.Bailey, 1856 † (basis of record)
Cocconeis placentula Ehrenberg, 1838 (basis of record)
Coelastrum microporum Nägeli, 1855 (basis of record)
Coscinodiscus commutatus Grunow, 1884 accepted as Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (basis of record)
Coscinodiscus nodulifer A.W.F.Schmidt, 1878 represented as Azpeitia nodulifera (A.W.F.Schmidt) G.A.Fryxell & P.A.Sims, 1986 (basis of record)
Crucigenia tetrapedia (Kirchner) Kuntze, 1898 accepted as Lemmermannia tetrapedia (Kirchner) Lemmermann, 1904 (basis of record)
Cyclotella cryptica Reimann, Lewin & Guillard, 1963 (basis of record)
Cyclotella radiosa (Grunow) Lemmermann, 1900 accepted as Cyclotella comta var. radiosa Grunow in Van Heurck, 1882 (basis of record)
Diatoma tenuis C.Agardh, 1812 (basis of record)
Dictyosphaerium ehrenbergianum Nägeli, 1849 (basis of record)
Diploneis interrupta (Kützing) Cleve, 1894 accepted as Navicula interrupta var. interrupta Kützing, 1844 (basis of record)
Ditylum brightwellii (T.West) Grunow, 1885 (basis of record)
Epithemia turgida (Ehrenberg) Kützing, 1844 accepted as Navicula turgida Ehrenberg, 1830 (basis of record)
Fragilaria ulna (Nitzsch) Lange-Bertalot, 1980 accepted as Bacillaria ulna Nitzsch, 1817 (basis of record)
Gyrosigma acuminatum (Kützing) Rabenhorst, 1853 (basis of record)
Gyrosigma attenuatum (Kützing) Rabenhorst, 1853 (basis of record)
Kephyrion spirale (Lackey) Conrad, 1939 (basis of record)
Lagerheimia R.Chodat, 1895 (basis of record)
Lagerheimia genevensis (Chodat) Chodat, 1895 (basis of record)
Melosira nummuloides C.Agardh, 1824 accepted as Melosira discigera Agardh, 1824 (basis of record)
Melosira varians C.Agardh, 1827 (basis of record)
Merismopedia warmingiana (Lagerheim) Forti, 1907 (basis of record)
Micractinium pusillum Fresenius, 1858 (basis of record)
Monoraphidium komarkovae Nygaard, 1979 (basis of record)
Monoraphidium minutum (Nägeli) Komárková-legnerová, 1969 (basis of record)
Odontella aurita (Lyngbye) C.Agardh, 1832 (basis of record)
Oscillatoria agardhii Gomont, 1892 accepted as Planktothrix agardhii (Gomont) Anagnostidis & Komárek, 1988 (basis of record)
Oscillatoria limnetica Lemmermann, 1900 accepted as Pseudanabaena limnetica (Lemmermann) Komárek, 1974 (basis of record)
Oscillatoria limosa C.Agardh ex Gomont, 1892 (basis of record)
Oscillatoria redekei Goor, 1918 accepted as Limnothrix redekei (Goor) Meffert, 1988 (basis of record)
Paralia sulcata (Ehrenberg) Cleve, 1873 (basis of record)
Plagiogrammopsis vanheurckii (Grunow) Hasle, von Stosch & Syvertsen, 1983 accepted as Plagiogramma vanheurckii Grunow, 1881 (basis of record)
Rhaphoneis amphiceros (Ehrenberg) Ehrenberg, 1844 (basis of record)
Rhizosolenia hebetata f. semispina (Hensen) Gran, 1908 accepted as Rhizosolenia semispina Hensen, 1887 (basis of record)
Scenedesmus acuminatus (Lagerheim) Chodat, 1902 accepted as Tetradesmus lagerheimii M.J.Wynne & Guiry, 2016 (basis of record)
Stauroneis phoenicenteron (Nitzsch) Ehrenberg, 1843 (basis of record)
Stephanodiscus hantzschii Grunow, 1880 (basis of record)
Stephanodiscus parvus Stoermer & Håkansson, 1984 (basis of record)
Surirella crumena Brébisson ex Kützing, 1849 (basis of record)
Surirella gemma Ehrenberg, 1839 accepted as Petrodictyon gemma (Ehrenberg) D.G.Mann, 1990 accepted as Surirella gemma f. gemma Ehrenberg, 1840 (basis of record)
Surirella ovalis Brébisson, 1838 (basis of record)
Thalassionema nitzschioides (Grunow) Mereschkowsky, 1902 (basis of record)

Scheldt estuary for Merismopedia warmingiana (Lagerheim) Forti, 1907 
Scheldt estuary for Oscillatoria agardhii Gomont, 1892 
Scheldt estuary for Oscillatoria limnetica Lemmermann, 1900 
Scheldt estuary for Oscillatoria redekei Goor, 1918