Caloneis lacunarum (Grunow) Hustedt, 1909 accepted as
Navicula lacunarum var. lacunarum Grunow in Van Heurck, 1880 (new combination reference)
Caloneis lacunarum var. fontinalis (Grunow) Hustedt, 1909 accepted as
Navicula fontinalis Grunow, 1885 accepted as
Caloneis fontinalis (Grunow) Cleve-Euler, 1932 (new combination reference)
Gomphonema acuminatum var. brebissonii (Kützing) Grunow, 1880 accepted as
Gomphonema brebissonii Kützing, 1849 (new combination reference)
Navicula acuta (W.Smith) O'Meara, 1875 accepted as
Stauroneis acuta f. acuta W. Smith, 1853 (new combination reference)
Navicula phoenicenteron var. irregularis Hustedt, 1909 (original description)
Stauroneis phoenicenteron var. irregularis Hustedt, 1909 (original description)
Surirella capronii var. calcarata (Pfitzer) Hustedt, 1909 accepted as
Surirella calcarata Pfitzer, 1871 (new combination reference)