Navicula americana f. lignitica Hustedt, 1961 (original description)
Navicula americana f. minor M.Peragallo & Héribaud-Joseph, 1893 (new combination reference)
Navicula bachmannii Hustedt, 1961 (original description)
Navicula bacillum f. genuina Hustedt, 1961 (original description)
Navicula bacillum f. gregoryana Grunow accepted as
Navicula bacillum var. gregoryana Grunow, 1880 (new combination reference)
Navicula bacillum f. lanceolata (Østrup) Hustedt, 1961 accepted as
Navicula pseudobacillum var. lanceolata Østrup, 1910 (new combination reference)
Navicula completa Hustedt, 1961 (original description)
Navicula crucigeriformis Hustedt, 1961 (original description)
Navicula crucigeroides Hustedt, 1961 (original description)
Navicula crystallina Hustedt, 1961 (original description)
Navicula cuspidata f. genuina Hustedt, 1961 (original description)
Navicula deliberata Hustedt, 1961 (original description)
Navicula disjuncta f. anglica Hustedt, 1961 (original description)
Navicula dubitanda Hustedt & Kolbe, 1987 † (original description)
Navicula egregia f. fennica Hustedt, 1961 (original description)
Navicula fasciculata (Grunow ex Cleve) Hustedt, 1961 accepted as
Navicula scopulorum var. fasciculata Grunow ex Cleve, 1894 accepted as
Climaconeis fasciculata (Grunow ex Cleve) E.J.Cox, 1982 (new combination reference)
Navicula fracta Hustedt, 1987 (original description)
Navicula gigantea Hustedt, 1961 (original description)
Navicula halophila f. subcapitata (Østrup) Krasske, 1929 accepted as
Navicula halophila var. subcapitata Oestrup, 1910 (new combination reference)
Navicula halophila f. typica Hustedt, 1961 (original description)
Navicula halophila var. reducta Hustedt, 1961 (original description)
Navicula hustedtii f. obtusa (Hustedt in Schmidt et al.) Hustedt, 1961 (new combination reference)
Navicula impexa Hustedt, 1961 (original description)
Navicula intractata Hustedt, 1961 (original description)
Navicula jungii f. inflata (Krasske) Hustedt, 1961 accepted as
Navicula jungii var. inflata Krasske, 1938 (new combination reference)
Navicula levanderi f. capitata (Krasske) Hustedt, 1961 accepted as
Navicula levanderi var. capitata Krasske, 1938 (new combination reference)
Navicula lorenzii (Grunow) Hustedt, 1961 (new combination reference)
Navicula medioconvexa Hustedt, 1961 (original description)
Navicula obtuserostrata Hustedt, 1961 (original description)
Navicula oestrupioides Hustedt, 1961 (original description)
Navicula perrotetii var. enervis Hustedt, 1961 (original description)
Navicula pseudocrassirostris Hustedt, 1961 (original description)
Navicula pupula f. elliptica (Hustedt) Hustedt, 1961 accepted as
Navicula pupula var. elliptica Hustedt, 1911 (new combination reference)
Navicula pupula f. rectangularis (W.Gregory) Hustedt, 1961 accepted as
Stauroneis rectangularis Gregory, 1854 (new combination reference)
Navicula pupula f. rostrata (Hustedt) Hustedt, 1961 accepted as
Navicula pupula var. rostrata Hustedt, 1911 (new combination reference)
Navicula quarnerensoides Hustedt, 1961 (original description)
Navicula rogallii Hustedt, 1961 (original description)
Navicula scopulorioides Hustedt, 1961 accepted as
Climaconeis scopulorioides (Hustedt) E.J.Cox, 1982 (original description)
Navicula scopulorum f. belgica (Van Heurck) Hustedt, 1961 accepted as
Navicula johnsonii var. belgica Van Heurck, 1885 (new combination reference)
Navicula scopulorum f. genuina Hustedt, 1961 (original description)
Navicula scopulorum f. triundulata Meister accepted as
Navicula scopulorum var. triundulata Meister ex Hustedt in Schmidt et al., 1934 (new combination reference)
Navicula semiaperta Hustedt, 1936 (original description)
Navicula subcrassirostris Hustedt, 1961 (original description)
Navicula tridentula f. parallela (Krasske) Hustedt, 1961 accepted as
Navicula tridentula var. parallela Krasske, 1925 (new combination reference)
Navicula vegae f. subconstricta (Grunow in Cleve & Möller) Hustedt, 1961 accepted as
Navicula vegae var. subconstricta Grunow in Cleve, 1883 (new combination reference)
Navicula ventralis f. simplex (Hustedt)? accepted as
Navicula ventralis var. simplex Hustedt, 1943 (new combination reference)
Navicula wawrikae Hustedt, 1961 represented as
Haslea wawrikae (Hustedt) Simonsen, 1974 (original description)
Navicula wittrockii f. cruciata (Hustedt) Hustedt, 1961 accepted as
Navicula bacilliformis var. cruciata Hustedt, 1914 (1915) (new combination reference)
Navicula wittrockii f. fusticulus (Østrup) Hustedt, 1961 accepted as
Navicula fusticulus Østrup, 1910 (new combination reference)
Navicula wittrockii f. genuina Hustedt, 1961 (original description)