Labellicula lecohuiana Majewska & Van de Vijver in Majewska et al., 2017
Labellicula subantarctica Van De Vijver & Lange-Bertalot, 2005 (uncertain > unassessed )
Neidium acutum Z.Levkov & S.Krstic, 2007
Neidium affine (Ehrenberg) Pfizer, 1871
Neidium affine f. affine (Ehrenberg) Pfitzer, 1871 accepted as Navicula affinis Ehrenberg, 1843
Neidium affine f. amphirhynchus (Ehrenberg) Cleve, 1894 accepted as Navicula amphirhynchus f. amphirhynchus Ehrenberg, 1843
Neidium affine f. amphirhynchus ceylonica (Skvortzov, 2012) (uncertain )
Neidium affine f. angustior Cleve-Euler, 1932 (uncertain > unassessed )
Neidium affine f. biglobosa Cleve-Euler, 1934 (uncertain > unassessed )
Neidium affine f. brevis Mayer, 1913 (uncertain > unassessed )
Neidium affine f. capitata (Skvortzow & Meyer) O.C. Schmidt, 1937 accepted as Neidium affine f. capitata Skvortzow & Meyer, 1928
Neidium affine f. capitata Skvortzow & Meyer, 1928 (uncertain > unassessed )
Neidium affine f. ceylonica Skvortzow, 1930 (uncertain > unassessed )
Neidium affine f. constricta (Frenguelli) Hustedt, 1957
Neidium affine f. constricta (Krasske) Cleve-Euler, 1955 (uncertain > unassessed )
Neidium affine f. constricta Cleve-Euler, 1939 (uncertain > unassessed )
Neidium affine f. constricta Krasske, 1925 (uncertain > unassessed )
Neidium affine f. constricta Messikommer, 1944 (uncertain > unassessed )
Neidium affine f. genuina Cleve, 1894 (uncertain > unassessed )
Neidium affine f. globosa Cleve-Euler, 1939 (uncertain > unassessed )
Neidium affine f. hankensis Skvortzow, 1929 (uncertain > unassessed )
Neidium affine f. hankensis Skvortzow, 1929 (uncertain > unassessed )
Neidium affine f. hankensis Skvortzow, 1929 (uncertain > unassessed )
Neidium affine f. hercynica (A.Mayer) Hustedt, 1930 accepted as Neidium hercynicum f. hercynicum Mayer, 1916 (1917)
Neidium affine f. incurvum (Gregory) Foged, 1974 accepted as Navicula incurva f. incurva Gregory, 1856
Neidium affine f. incurvum (Gregory, Ostrup) Foged, 1974 (uncertain > unassessed )
Neidium affine f. koreana (Skvortzov) Skvortzov & Noda, 1971 (uncertain > unassessed )
Neidium affine f. koreana Skvortzow, 1929 (uncertain > unassessed )
Neidium affine f. latior Mayer, 1925 (uncertain > unassessed )
Neidium affine f. longiceps (Gregory) Cleve, 1894 accepted as Navicula longiceps var. longiceps Gregory, 1856
Neidium affine f. major Cleve, 1894 (uncertain > unassessed )
Neidium affine f. major Otto Müller, 1910 (uncertain > unassessed )
Neidium affine f. major triundulata (Hustedt) Cleve-Euler, 1932 accepted as Neidium productum var. triundulata Hustedt, 1922
Neidium affine f. manschurica Skvortzow, 1928 (uncertain > unassessed )
Neidium affine f. maxima Cleve, 1894 (uncertain > unassessed )
Neidium affine f. maxima O. Müller, 1898 accepted as Neidium maximum (Cleve) Meister, 1912
Neidium affine f. maxima genuina O. Müller, 1898 (uncertain > unassessed )
Neidium affine f. media (Cleve) Proschkina-Lavrenko, 1950 (uncertain > unassessed )
Neidium affine f. media Cleve, 1894 (uncertain > unassessed )
Neidium affine f. media Cleve-Euler, 1932 (uncertain > unassessed )
Neidium affine f. media Otto Müller, 1910 (uncertain > unassessed )
Neidium affine f. media genuina Otto Müller, 1898 (uncertain > unassessed )
Neidium affine f. minor Cleve, 1894 (uncertain > unassessed )
Neidium affine f. minor Cleve, 1894 (uncertain > unassessed )
Neidium affine f. minor Otto Müller, 1910 (uncertain > unassessed )
Neidium affine f. minor genuina Otto Müller, 1898 (uncertain > unassessed )
Neidium affine f. minor subrostratum Mayer, 1925 (uncertain > unassessed )
Neidium affine f. obtusata Tarnavschi & Jitariu, 1955 (uncertain > unassessed )
Neidium affine f. pusilla Mayer, 1916 (1917) (uncertain > unassessed )
Neidium affine f. pygmaea (Mayer) F.W. Mills, 1934 (uncertain > unassessed )
Neidium affine f. pygmaea Mayer, 1916 (1917) (uncertain > unassessed )
Neidium affine f. subrostrata Mayer, 1940 (uncertain > unassessed )
Neidium affine f. tenuirostris Mayer, 1916 (1917) (uncertain > unassessed )
Neidium affine f. truncatula Gonzalves & Gandhi, 1953 (uncertain > unassessed )
Neidium affine f. undulata Grunow accepted as Navicula affinis var. undulata Grunow, 1860
Neidium affine f. undulata Hustedt, 1914 (uncertain > unassessed )
Neidium affine f. undulatum sensu Mayer, 1925 (uncertain > unassessed )
Neidium affine var. amphirhynchus f. truncatula Gonzalves & H.P.Gandhi, 1953
Neidium affine var. ampliata (Ehrenberg) Frenguelli, 1933 accepted as Navicula ampliata var. ampliata Ehrenberg, 1842
Neidium affine var. bonsaensis Foged, 1966 (uncertain > unassessed )
Neidium affine var. capitata K. Mölder, 1937 (uncertain > unassessed )
Neidium affine var. capitatum Molder in Ross, 1947 (uncertain > unassessed )
Neidium affine var. capitatum Molder, 1939 (uncertain > unassessed )
Neidium affine var. ceylonica Reimer, 1959 (uncertain > unassessed )
Neidium affine var. constricta Frenguelli, 1941 accepted as Neidium affine f. constricta (Frenguelli) Hustedt, 1957
Neidium affine var. constrictum Messikommer, 1944 (uncertain > unassessed )
Neidium affine var. constrictum Messikommer, 1945 (uncertain > unassessed )
Neidium affine var. dippelii Cleve-Euler, 1932 (uncertain > unassessed )
Neidium affine var. dubia (Ehrenberg) Frenguelli, 1942 accepted as Navicula dubia f. dubia Ehrenberg, 1843
Neidium affine var. elegans Mayer, 1913 (uncertain > unassessed )
Neidium affine var. globiceps Cleve-Euler, 1934 (uncertain > unassessed )
Neidium affine var. hankensis (Skvortzow) Reimer, 1959 (uncertain > unassessed )
Neidium affine var. humeris Reimer, 1959 (uncertain > unassessed )
Neidium affine var. humerus Reimer, 1959 (uncertain > unassessed )
Neidium affine var. intermedia (Dippel) F.W. Mills, 1934 accepted as Navicula affinis var. intermedia Dippel, 1905
Neidium affine var. linearis Foged, 1981 (uncertain > unassessed )
Neidium affine var. longiceps sensu Ostrup, 1910 (uncertain > unassessed )
Neidium affine var. lucinensis Hustedt, 1950 (uncertain > unassessed )
Neidium affine var. maxima (Cleve) Mayer, 1913 (uncertain > unassessed )
Neidium affine var. medium Cleve (uncertain > unassessed )
Neidium affine var. minimum Swirenko, 1941 (uncertain > taxon inquirendum )
Neidium affine var. minus Cleve (uncertain > unassessed )
Neidium affine var. ranomafanensis Manguin, 1952 (uncertain > unassessed )
Neidium affine var. rhodana Brun, 1895 (uncertain > unassessed )
Neidium affine var. subampliata (Grunow in Schmidt et al.) Prudent, 1906 accepted as Navicula firma var. subampliata Grunow, 1877
Neidium affine var. subrostratum Mayer, 1916 (1917) (uncertain > unassessed )
Neidium agonaense Foged, 1966
Neidium alaskaense Foged, 1968
Neidium alpinum Hustedt, 1943
Neidium alpinum var. quadripunctatum (Hustedt) Hamilton, 1990 (uncertain > unassessed )
Neidium amphiatlanticum D. Metzeltin & H. Lange-Bertalot, 2007
Neidium amphigomphoides Mayer, 1925 (uncertain > unassessed )
Neidium amphigomphus (Ehrenberg) Pfitzer, 1871
Neidium amphigomphus f. amphigomphus (Ehrenberg) Pfitzer, 1871 accepted as Navicula amphigomphus var. amphigomphus Ehrenberg, 1843
Neidium amphigomphus f. curtum Poretsky, 1924 (uncertain > unassessed )
Neidium amphigomphus f. genuinum Cleve-Euler, 1955 (uncertain > unassessed )
Neidium amphigomphus f. signata Cleve-Euler, 1955 (uncertain > unassessed )
Neidium amphigomphus var. capitatum Meyer, 1930 (uncertain > unassessed )
Neidium amphigomphus var. dideltoides Cleve-Euler, 1955 (uncertain > unassessed )
Neidium amphigomphus var. intermedium McCall, 1933 (uncertain > unassessed )