Achnanthes gibbosa Hustedt, 1939 (original description)
Achnanthes lemmermannii var. obtusa Hustedt, 1939 (original description)
Achnanthes linkei var. linkei Hustedt, 1939 (original description)
Achnanthes subatomus Hustedt, 1939 (original description)
Biddulphia rostrata var. rostrata Hustedt, 1939 (original description)
Cocconeis peltoides Hustedt, 1939 (original description)
Cocconeis pseudograta Hustedt, 1939 (original description)
Cocconeis tenuis Hustedt, 1939 (original description)
Cyclotella pseudostelligera Hustedt, 1939 (original description)
Diploneis aestuari Hustedt, 1939 (original description)
Eunotogramma dubium Hustedt, 1939 (original description)
Navicula abscondita Hustedt, 1939 (original description)
Navicula abstrusa Hustedt, 1939 (original description)
Navicula aequorea Hustedt, 1939 (original description)
Navicula apiculata var. minima (Grunow in Van Heurck) Hustedt, 1939 (new combination reference)
Navicula biskanteri Hustedt, 1939 (original description)
Navicula bremeyeri f. bremeyeri Hustedt, 1939 (original description)
Navicula bremeyeri f. rostrata Hustedt, 1939 (original description)
Navicula bremeyeri var. rostrata Hustedt, 1939 (original description)
Navicula clamans var. clamans Hustedt, 1939 (original description)
Navicula consentanea Hustedt, 1939 (original description)
Navicula digitoradiata f. linearis Hustedt, 1939 (original description)
Navicula digitoradiata var. rostrata Hustedt, 1939 (original description)
Navicula dilucida Hustedt, 1939 (original description)
Navicula diserta Hustedt, 1939 (original description)
Navicula flagellifera Hustedt, 1939 (original description)
Navicula groschopfi Hustedt, 1939 (original description)
Navicula manifesta Hustedt, 1939 (original description)
Navicula mucicola Hustedt, 1939 (original description)
Navicula palpebralis f. vahliana (Grunow in Schmidt) Hustedt, 1939 accepted as Navicula vahliana Grunow in Schmidt, 1874 (new combination reference)
Navicula pavillardi var. pavillardi Hustedt, 1939 (original description)
Navicula salinicola var. salinicola Hustedt, 1939 (original description)
Navicula solutepunctata Hustedt, 1939 (original description)
Navicula subapiculata (Grunow in Cleve & Grunow) Hustedt, 1939 accepted as Navicula cancellata var. subapiculata Grunow in Cleve & Grunow, 1880 (new combination reference)
Navicula torquata (Harvey) Hustedt accepted as Schizonema smithii var. torquatum Harvey, 1841 (new combination reference)
Neidium opulentum Hustedt, 1939 (original description)
Nitzschia accedens var. accedens Hustedt, 1939 (original description)
Nitzschia aequorea Hustedt, 1939 (original description)
Nitzschia dubiformis Hustedt, 1939 (original description)
Nitzschia frustulum f. constricta Hustedt, 1939 (original description)
Nitzschia laevis Hustedt, 1939 (original description)
Nitzschia linkei Hustedt, 1939 (original description)
Nitzschia pseudocommunis Hustedt, 1939 (original description)
Nitzschia subcapitellata Hustedt, 1939 (original description)
Nitzschia subfrustulum Hustedt, 1939 (original description)
Nitzschia vasta Hustedt, 1939 (original description)
Pinnularia irrorata (Grunow) Hustedt, 1942 accepted as Pinnularia appendiculata var. irrorata Boye-Petersen, 1928 (new combination reference)
Plagiogramma brockmanni var. brockmanni Hustedt, 1939 (original description)
Rhaphoneis minutissima Hustedt, 1939 (original description)
Stauroneis gregorii f. linearis Hustedt, 1939 (original description)
Stauroneis gregorii var. densestriata Hustedt, 1939 (original description)
Stauroneis ignorata var. ignorata Hustedt, 1939 (original description)
Stauroneis undata Hustedt, 1939 (original description)
Stephanodiscus lucens Hustedt, 1939 (original description)
Stephanodiscus tenuis var. tenuis Hustedt, 1939 (original description)