Ethmodiscus punctiger Castracane, 1886 (basis of record)
Thalassiosira angulata (W.Gregory) Hasle, 1978 accepted as Orthosira angulata Gregory, 1857 (basis of record)
Thalassiosira anguste-lineata (A.Schmidt) G.Fryxell & Hasle, 1977 accepted as Coscinodiscus angustelineatus Schmidt in Schmidt et al., 1878 (basis of record)
Thalassiosira decipiens (Grunow) E.G.Jørgensen, 1905 (basis of record)
Thalassiosira eccentrica (Ehrenberg) Cleve, 1904 (basis of record)
Thalassiosira nordenskioeldii Cleve, 1873 (basis of record)
Thalassiosira pacifica Gran & Angst, 1931 (basis of record)
Thalassiosira proschkinae Makarova, 1979 (basis of record)
Thalassiosira pseudonana Hasle & Heimdal, 1970 (basis of record)
Thalassiosira punctigera (Castracane) Hasle, 1983 accepted as Ethmodiscus punctiger Castracane, 1886 (basis of record)
Thalassiosira rotula Meunier, 1910 (basis of record)

Scheldt estuary for Thalassiosira angulata (W.Gregory) Hasle, 1978 
Scheldt estuary for Thalassiosira anguste-lineata (A.Schmidt) G.Fryxell & Hasle, 1977 
Scheldt estuary for Thalassiosira decipiens (Grunow) E.G.Jørgensen, 1905 
Scheldt estuary for Thalassiosira eccentrica (Ehrenberg) Cleve, 1904 
Scheldt estuary for Thalassiosira nordenskioeldii Cleve, 1873 
Scheldt estuary for Thalassiosira pacifica Gran & Angst, 1931 
Scheldt estuary for Thalassiosira proschkinae Makarova, 1979 
Scheldt estuary for Thalassiosira pseudonana Hasle & Heimdal, 1970 
Scheldt estuary for Thalassiosira punctigera (Castracane) Hasle, 1983 
Scheldt estuary for Thalassiosira rotula Meunier, 1910