Ditylum brightwellii (T.West) Grunow, 1885 (uncertain > unassessed )
Ditylum brightwellii f. biangulata Hustedt, 1930 (uncertain > unassessed )
Ditylum brightwellii f. pentagona Gaarder, 1951 (uncertain > unassessed )
Ditylum brightwellii f. tetragona (Grunow in Van Heurck) Hustedt, 1930 accepted as Ditylum brightwellii var. tetragona Grunow in Van Heurck, 1883
Ditylum brightwellii var. brightwellii Peragallo & Peragallo, 1901 (uncertain > unassessed )
Ditylum brightwellii var. inaequalis Grunow in Van Heurck, 1883 (uncertain > unassessed )
Ditylum brightwellii var. tetragona Grunow in Van Heurck, 1883 (uncertain > unassessed )
Ditylum brightwellii var. trigona Grunow in Van Heurck, 1883 (uncertain > unassessed )
Ditylum buchananii von Stosch, 1987 (uncertain > unassessed )
Ditylum cornutum Forti & Schulz, 1932 (uncertain > unassessed )
Ditylum ehrenbergii Grunow in Van Heurck, 1883 (uncertain > unassessed )
Ditylum grovei Brun, 1891 (uncertain > unassessed )
Ditylum inaequale J.W.Bailey ex L.W.Bailey, 1862 (uncertain > unassessed )
Ditylum intricatum Grunow accepted as Triceratium intricatum T.West, 1860
Ditylum pernodi Schröder, 1906 (uncertain > unassessed )
Ditylum segmentale Brun, 1891 (uncertain > unassessed )
Ditylum sol (Grunow) De Toni, 1894 (uncertain > unassessed )
Ditylum sol Cleve, 1900 accepted as Triceratium sol A. Schmidt, 1890
Ditylum trigonum L.W.Bailey ex L.W.Bailey, 1862 (uncertain > unassessed )
Ditylum trigonum Schroder, 1906 (uncertain > unassessed )
Ditylum trigonum Schröder, 1906 (uncertain > unassessed )
Ditylum undulatum Mann, 1907 accepted as Triceratium undulatum Brightwell, 1858
Helicotheca tamesis (Shrubsole) M.Ricard, 1987 (uncertain > unassessed )
Lithodesmioides minutum Stosch, 1987 (uncertain > unassessed )
Lithodesmioides polymorpha Stosch, 1987
Lithodesmioides polymorpha var. tunisiensis M. De Stefano in Yahia-Kéfi et al., 2005 (uncertain > unassessed )
Lithodesmioides polymorphum von Stosch, 1987 (uncertain > unassessed )
Lithodesmium africanum Leuduger-Fortmorel, 1898 (uncertain > unassessed )
Lithodesmium asketogonium Barron, 1975 (uncertain > unassessed )
Lithodesmium biceps H. Peragallo in Tempère & Peragallo, 1909 (uncertain > unassessed )
Lithodesmium californicum Grunow, 1883
Lithodesmium californicum var. californicum Grunow in Van Heurck, 1883 (uncertain > unassessed )
Lithodesmium californicum var. tigrina Tempère & Brun in Brun & Tempère, 1889 (uncertain > unassessed )
Lithodesmium contractum L.W. Bailey, 1861 (uncertain > unassessed )
Lithodesmium cornigerum J.Brun, 1896 † (uncertain > unassessed )
Lithodesmium duckerae Von Stosch, 1987 (uncertain > unassessed )
Lithodesmium ehrenbergii Forti
Lithodesmium ehrenbergii f. dicentrica (uncertain > unassessed )
Lithodesmium ehrenbergii f. dicentrica quadragona Forti, 1912 (uncertain > unassessed )
Lithodesmium ehrenbergii f. ehrenbergii (Grunow in Van Heurck) Forti, 1912 accepted as Triceratium ehrenbergii Grunow in Van Heurck, 1883
Lithodesmium ehrenbergii f. quadrigona (uncertain > unassessed )
Lithodesmium ehrenbergii f. quadrigona dicentrica Forti, 1913 (uncertain > unassessed )
Lithodesmium ehrenbergii var. ehrenbergii Forti, 1912 (uncertain > unassessed )
Lithodesmium hirtum (Ehrenberg) (uncertain > unassessed )
Lithodesmium impressum (Grunow in Cleve & Moller; Grunow in Van Heurck) De Toni, 1894 accepted as Triceratium impressum Grunow, 1883
Lithodesmium intricatum (T. West) Peragallo & Peragallo, 1897-1908 accepted as Triceratium intricatum T.West, 1860
Lithodesmium margaritaceum Long, Fuge & Smith, 1946 (uncertain > unassessed )
Lithodesmium minusculum (uncertain > unassessed )
Lithodesmium minusculum f. major Grunow in Van Heurck, 1883 (uncertain > unassessed )
Lithodesmium minusculum f. minusculum Grunow in Van Heurck, 1883 (uncertain > unassessed )
Lithodesmium pliocenicum Schrader, 1973 (uncertain > unassessed )
Lithodesmium reynoldsii Barron, 1976 (uncertain > unassessed )
Lithodesmium rotunda Schrader in Schrader & Fenner, 1976 (uncertain > unassessed )
Lithodesmium segmentale (Brun) De Toni, 1894 accepted as Ditylum segmentale Brun, 1891
Lithodesmium undulatum Ehrenberg, 1839 (uncertain > unassessed )
Lithodesmium undulatum var. minor Grunow, 1883 (uncertain > unassessed )
Lithodesmium variabile Takano, 1979 (uncertain > unassessed )
Lithodesmium victoriae Karsten, 1906 (uncertain > unassessed )
Pauliella taeniata (Grunow) F.E.Round & P.W.Basson, 1997 (uncertain > unassessed )
Tropidoneis adeliae Manguin, 1960 (uncertain > unassessed )
Tropidoneis adriatica Cleve, 1894 (uncertain > unassessed )
Tropidoneis angusta Mereschkowsky, 1902-1903 (uncertain > unassessed )
Tropidoneis antarctica (Grunow) Cleve, 1894 accepted as Membraneis challengeri (Grunow) Paddock, 1988 accepted as Navicula challengeri Grunow, 1880
Tropidoneis antarctica var. adeliana Manguin, 1960 (uncertain > unassessed )
Tropidoneis antarctica var. antarctica Cleve, 1894 (uncertain > unassessed )
Tropidoneis antarctica var. polyplasta Gran & Angst, 1931 (uncertain > unassessed )
Tropidoneis approximata Cleve, 1894 (uncertain > unassessed )
Tropidoneis australis (M. Peragallo) Mann, 1937 accepted as Pseudoamphiprora australis M. Peragallo, 1921 †
Tropidoneis belgicae (Van Heurck) Heiden, 1928 accepted as Banquisia belgicae (Van Heurck) Paddock, 1988 accepted as Amphiprora belgicae var. belgicae Van Heurck, 1909
Tropidoneis belgicae var. belgicae (Van Heurck) Heiden in Heiden & Kolbe, 1928 accepted as Amphiprora belgicae var. belgicae Van Heurck, 1909
Tropidoneis belgicae var. major (Van Heurck) Heiden accepted as Amphiprora belgicae var. major Van Heurck, 1909
Tropidoneis candida Mann, 1937 (uncertain > unassessed )
Tropidoneis charcotii M. Peragallo, 1921 (uncertain > unassessed )
Tropidoneis chinensis Cleve, 1894 (uncertain > unassessed )
Tropidoneis clevei Mereschkowsky, 1903 (uncertain > unassessed )
Tropidoneis confusa Hendey, 1964 (uncertain > unassessed )
Tropidoneis conserta (Lewis) Cleve, 1894 accepted as Amphiprora conserta Lewis, 1862
Tropidoneis dannfeltii Cleve-Euler, 1952 (uncertain > unassessed )
Tropidoneis decussata (uncertain > unassessed )
Tropidoneis decussata var. decussata (Grunow in Cleve & Grunow) Heiden & Kolbe, 1928 accepted as Amphiprora decussata var. decussata Grunow in Cleve & Grunow, 1880
Tropidoneis decussata var. sigmoidea Heiden & Kolbe, 1928 (uncertain > unassessed )
Tropidoneis didyma (W. Smith) F.W. Mills, 1935 accepted as Amphiprora didyma W.Smith, 1853
Tropidoneis elegans (W.Smith) Cleve, 1894
Tropidoneis elegans var. adriatica (Grunow in Cleve & Grunow) Cleve, 1894 accepted as Amphiprora elegans var. adriatica Grunow in Cleve & Grunow, 1880
Tropidoneis elegans var. elegans (W. Smith) Cleve, 1894 accepted as Amphiprora elegans var. elegans W. Smith, 1856
Tropidoneis elegans var. glacialis Frenguelli & Orlando, 1958 (unaccepted > nomen nudum )
Tropidoneis elegans var. gracilis (Grunow in Cleve & Grunow) (uncertain > unassessed )
Tropidoneis elegans var. posewitzii (Pantocsek) Cleve, 1894 accepted as Amphiprora posewitzii Pantocsek, 1889
Tropidoneis fragilis (Tempère & Brun) Mann, 1925 accepted as Amphiprora fragilis Tempère & Brun in Brun & Tempère, 1889
Tropidoneis fusiformis E.Manguin, 1957 (uncertain > unassessed )
Tropidoneis fusuformis Manguin, 1957 (uncertain > unassessed )
Tropidoneis gaussii Heiden, 1928 (uncertain > unassessed )
Tropidoneis gibberula (Grunow) Cleve, 1894 (uncertain > unassessed )
Tropidoneis gibberula var. gibberula (Grunow in Van Heurck) Cleve, 1894 accepted as Plagiotropis gibberula Grunow, 1880
Tropidoneis gibberula var. neogenica Zanon, 1933 (uncertain > unassessed )
Tropidoneis glacialis (Castracane) Mann, 1937 accepted as Stauroneis glacialis Castracane, 1886
Tropidoneis glacialis Heiden accepted as Manguinea rigida (M.Peragallo) Paddock, 1988 accepted as Amphiprora rigida M. Peragallo, 1924
Tropidoneis glacialis var. constricta Heiden (uncertain > unassessed )
Tropidoneis glacialis var. glacialis Heiden & Kolbe, 1928 (uncertain > unassessed )
Tropidoneis hustedtii Manguin, 1960 (uncertain > unassessed )