Achnanthes calcar Cleve, 1891 accepted as Gliwiczia calcar (Cleve) M.Kulikovskiy, Lange-Bertalot & A.Witkowski, 2013 (original description)
Achnanthes calcar f. calcar Cleve, 1891 (original description)
Achnanthes clevei var. bottnica Cleve, 1891 (original description)
Achnanthes dispar var. dispar Cleve, 1891 (original description)
Achnanthes lanceolata var. elliptica Cleve, 1891 (original description)
Achnanthidium minutum Cleve, 1891 (original description)
Coscinodiscus balticus (Grunow) Grunow ex Cleve, 1891 accepted as Coscinodiscus polyacanthus var. baltica Grunow in Cleve & Grunow, 1880 (new combination reference)
Cymbella borealis Cleve, 1891 (original description)
Cymbella heteropleura f. minor Cleve, 1891 (original description)
Cymbella naviculacea var. incerta Cleve, 1891 (original description)
Diploneis boldtiana Cleve, 1891 (original description)
Diploneis elliptica var. ladogensis Cleve, 1891 accepted as Diploneis ladogensis P.T. Cleve, 1891 (original description)
Diploneis finnica (Ehrenberg) Cleve, 1891 accepted as Cocconeis finnica Ehrenberg, 1838 (new combination reference)
Diploneis ovalis (Hilse) Cleve, 1891 accepted as Pinnularia ovalis Hilse, 1860 (new combination reference)
Diploneis parma Cleve, 1891 (original description)
Encyonema ventricosum var. caespitosum Cleve, 1891 (original description)
Eunotia clevei Grunow, 1891 † (original description)
Navicula amphibola f. amphibola Cleve, 1891 (original description)
Navicula depressa Cleve, 1891 (original description)
Navicula ladogensis Cleve, 1891 (original description)
Navicula obliqua (Gregory) Cleve, 1891 accepted as Gololobovia obliqua (W.Gregory) Kulikovskiy, Glushchenko & Kociolek in Kulikovskiy et al., 2020 (new combination reference)
Navicula subtilissima f. subtilissima Cleve, 1891 (original description)
Navicula torneensis f. torneensis Cleve, 1891 (original description)
Navicula torneensis var. aboensis Cleve, 1891 (original description)
Pinnularia bicapitata var. bicapitata (Lagerstedt) Cleve, 1891 accepted as Navicula bicapitata f. bicapitata Lagerstedt, 1873 (new combination reference)
Pinnularia brandelii var. brandelii Cleve, 1891 (original description)
Pinnularia brevicostata f. brevicostata Cleve, 1891 (original description)
Pinnularia brevicostata f. leptostauron Cleve, 1891 (original description)
Pinnularia episcopalis f. episcopalis Cleve, 1891 (original description)
Pinnularia gentilis var. gentilis (Donkin) Cleve, 1891 accepted as Navicula gentilis var. gentilis Donkin, 1872 (new combination reference)
Pinnularia karelica var. karelica Cleve, 1891 (original description)
Pinnularia krookii (Grunow) Cleve, 1891 (new combination reference)
Pinnularia major f. transversa (Schmidt in Schmidt et al.) Cleve, 1891 accepted as Navicula transversa A.Schmidt, 1876 (new combination reference)
Pinnularia mesogongyla Cleve, 1891 (original description)
Pinnularia mesogongyla var. interrupta Cleve, 1891 (original description)
Pinnularia mesolepta var. crassior Cleve, 1891 (original description)
Pinnularia microstauron f. microstauron (Ehrenberg) Cleve, 1891 accepted as Stauroptera microstauron Ehrenberg, 1843 (new combination reference)
Pinnularia platycephala f. platycephala (Ehrenberg) Cleve, 1891 accepted as Stauroptera platycephala Ehrenberg, 1854 (new combination reference)
Pinnularia streptoraphe f. streptoraphe Cleve, 1891 (original description)
Pinnularia undulata sensu Cleve, 1891 (original description)
Pinnularia viridis var. distinguenda Cleve, 1891 † (original description)
Pinnularia viridis var. intermedia Cleve, 1891 (original description)
Pinnularia viridis var. minor Cleve, 1891 † (original description)
Stauroneis anceps var. fossilis Cleve, 1891 (original description)
Stauroneis phoenicenteron var. lanceolata (Kützing) Cleve, 1891 accepted as Stauroneis lanceolata Kützing, 1844 (new combination reference)
Synedra ulna var. capitata Cleve, 1891 (original description)