Coscinodiscus curvatulus var. odontodiscus (Grunow) Hustedt, 1928 accepted as
Coscinodiscus odontodiscus var. odontodiscus Grunow, 1884 (new combination reference)
Coscinodiscus divisus Hustedt, 1928 (original description)
Coscinodiscus excentricus var. fasciculata Hustedt, 1928 (original description)
Coscinodiscus gigas var. praetexta (Janisch) Hustedt, 1930 (original description)
Coscinodiscus granii var. aralensis (Ostenfeld) Hustedt, 1928 accepted as
Coscinodiscus aralensis Ostenfeld, 1908 (new combination reference)
Coscinodiscus hauckii var. mesoleia (Cleve) Hustedt, 1928 accepted as
Coscinodiscus mesoleius Cleve (new combination reference)
Coscinodiscus jonesianus var. commutata (Grunow) Hustedt, 1928 accepted as
Eupodiscus commutatus Grunow, 1884 (new combination reference)
Coscinodiscus lineatus var. irregularis (Tempère & Peragallo) Hustedt, 1928 accepted as
Coscinodiscus leptopus var. irregularis Tempère & Peragallo, 1907 (new combination reference)
Coscinodiscus perforatus var. pavillardi (Forti) Hustedt, 1928 accepted as
Coscinodiscus pavillardii Forti, 1922 (new combination reference)
Coscinodiscus radiatus f. parva (Grunow) Hustedt, 1928 accepted as
Coscinodiscus radiatus var. parva Grunow, 1878 (new combination reference)
Coscinodiscus rothii var. subsalsa (Juhlin-Dannfelt) Hustedt, 1928 accepted as
Coscinodiscus subsalsus Juhlin-Dannfelt, 1882 (new combination reference)
Coscinodiscus tabularis var. egregius (Rattray) Hustedt, 1928 accepted as
Coscinodiscus egregius Rattray, 1890 (new combination reference)
Cyclotella austriaca (M.Peragallo, Handmann & Schiedler) Hustedt, 1948 accepted as
Handmannia austriaca f. austriaca M. Peragallo in Handmann, 1913 (new combination reference)
Cyclotella meneghiniana f. plana (Fricke) Hustedt, 1928 (new combination reference)
Cyclotella meneghiniana var. laevissima (Van Goor) Hustedt, 1928 accepted as
Cyclotella laevissima Van Goor, 1920 (new combination reference)
Cyclotella meneghiniana var. pumila (Grunow in Van Heurck) Hustedt, 1928 accepted as
Cyclotella pumila Grunow, 1882 (new combination reference)
Cyclotella quadrijuncta (Schröter) von Keissler, 1910 accepted as
Cyclotella comta var. quadrijuncta Schrot., 1896 (new combination reference)
Cyclotella schroeteri auct. plur. according to Hustedt, 1928 (original description)
Cyclotella striata sensu auct. e. p. according to Hustedt, 1928 (original description)
Cyclotella striata var. subsalina (Grunow) Hustedt, 1928 accepted as
Cyclotella subsalina Grunow, 1882 (new combination reference)
Druridgia compressa (West) Donkin, 1861 accepted as
Podosira compressa T.West, 1860 (new combination reference)
Ethmodiscus gazellae (C.Janisch ex Grunow) Hustedt, 1928 accepted as
Coscinodiscus gazellae C.Janisch ex Grunow, 1879 (new combination reference)
Nitzschia geniculata Hustedt, 1928 (original description)
Podosira hormoides var. adriatica (Kützing) Hustedt, 1928 accepted as
Pyxidicula adriatica Kützing, 1844 (new combination reference)
Podosira hormoides var. arctica (Cleve ex Cleve & Grunow) Hustedt, 1928 accepted as
Hyalodiscus maximus var. arctica Cleve in Cleve & Moller, 1877 (new combination reference)
Podosira hormoides var. delicatula (Grunow in Van Heurck) Hustedt, 1928 accepted as
Podosira adriatica var. delicatula Grunow in Van Heurck, 1882 (new combination reference)
Stephanodiscus dubius f. dubius (Fricke in Schmidt et al.) Hustedt, 1928 accepted as
Cyclotella dubia var. dubia Fricke in Schmidt et al., 1900 (new combination reference)
Stephanodiscus subsalsus (A. Cleve-Euler) Hustedt, 1928 (new combination reference)
Thalassiosira bioculata var. exigua (Grunow) Hustedt, 1928 accepted as
Coscinodiscus bioculatus var. exigua Grunow, 1884 (new combination reference)