Achnanthes hauckiana var. hauckiana Grunow in Cleve & Grunow, 1880 (original description)
Achnanthes marginulata var. marginulata Grunow in Cleve & Grunow, 1880 (original description)
Amphiprora kjellmanii var. kjellmanii Cleve in Cleve & Grunow, 1880 (original description)
Hantzschia amphioxys var. capitellata Grunow in Cleve & Grunow, 1880 (original description)
Hantzschia amphioxys var. elongata (Hantzsch) Grunow in Cleve & Grunow, 1880 accepted as
Nitzschia elongata var. elongata Hassall, 1845 (new combination reference)
Navicula abbreviata Grunow in Cleve & Grunow, 1880 (original description)
Navicula cancellata var. gregorii Grunow, 1880 (original description)
Navicula challengeri Grunow, 1880 (original description)
Navicula globiceps Grunow in Cleve & Grunow, 1880 (original description)
Navicula mutica var. ventricosa (Kützing) Cleve & Grunow, 1880 accepted as
Stauroneis ventricosa var. ventricosa Kützing, 1844 (new combination reference)
Nitzschia littoralis var. littoralis Grunow in Cleve & Grunow, 1880 (original description)
Nitzschia palea var. debilis (Kützing) Grunow, 1880 accepted as
Synedra debilis Kützing, 1844 (new combination reference)
Nitzschia scalpelliformis Grunow, 1880 (original description)
Thalassiothrix P.T. Cleve & A. Grunow, 1880 (original description)