Achnanthes aapajaervensis A.Cleve, 1934 (original description)
Achnanthes anceps A.Cleve, 1934 (original description)
Achnanthes crucifera var. capitata Cleve-Euler, 1934 (original description)
Achnanthes elliptica var. pungens Cleve-Euler, 1934 accepted as Skabitschewskia pungens (Cleve-Euler) Kulikovskiy & Lange-Bertalot, 2015 (original description)
Achnanthes kuolensis Cleve-Euler, 1934 (original description)
Achnanthes lanceolata var. fennica Cleve-Euler, 1934 (original description)
Achnanthes pseudoseminulum Cleve-Euler, 1934 (original description)
Achnanthes rostellata A.Cleve, 1934 (original description)
Achnanthes suspecta A.Cleve, 1934 (original description)
Achnanthes tanensis Cleve-Euler, 1934 (original description)
Amphiprora rectangulata Cleve-Euler, 1934 (original description)
Anomoeoneis serians var. modesta Cleve-Euler, 1934 (original description)
Caloneis ladogensis f. capitata Cleve-Euler, 1934 (original description)
Caloneis ladogensis f. cuneata Cleve-Euler, 1934 (original description)
Caloneis ladogensis f. latestriata Cleve-Euler, 1934 (original description)
Caloneis ladogensis f. stauroneiformis Cleve-Euler, 1934 (original description)
Caloneis ladogensis f. vulgaris Cleve-Euler, 1934 (original description)
Caloneis silicula var. capitata (Lagerstedt) Cleve, 1894 accepted as Navicula gibberula var. capitata Lagerstedt, 1873 (new combination reference)
Caloneis ventricosa var. kuolensis Cleve-Euler, 1934 (original description)
Cocconeis cholnokyana Cleve-Euler, 1934 (original description)
Cocconeis lapponica var. fennica Cleve-Euler, 1934 (original description)
Cocconeis pinnata (Hustedt) Cleve-Euler, 1934 accepted as Achnanthes pinnata var. pinnata Hustedt, 1922 (new combination reference)
Cocconeis placentula f. elata Cleve-Euler, 1934 (original description)
Cymatopleura albaregiensis var. albaregiensis (Pantocsek) Cleve-Euler accepted as Surirella albaregiensis Pantocsek, 1902 (new combination reference)
Cymbella aequalis var. fossilis Cleve-Euler, 1934 (original description)
Cymbella aequalis var. lapponica Cleve-Euler, 1934 (original description)
Cymbella aequalis var. oblonga Cleve-Euler, 1934 (original description)
Cymbella amphioxys var. parallela Cleve-Euler, 1934 (original description)
Cymbella aspera var. gigantea Cleve-Euler, 1934 (original description)
Cymbella cuspidata var. schulzii Cleve-Euler, 1934 (original description)
Cymbella incerta var. subconstricta (Østrup) Cleve-Euler, 1934 accepted as Cymbella subconstricta Østrup, 1918 (1920) (new combination reference)
Cymbella jonsonii Cleve-Euler, 1934 (original description)
Cymbella paucistriata Cleve-Euler, 1934 (original description)
Cymbella perpusilla var. major Cleve-Euler, 1934 (original description)
Cymbella sphaerophora A.Cleve, 1934 (original description)
Cymbella subarctica Cleve-Euler, 1934 (original description)
Cymbella subwulffii Cleve-Euler, 1934 (original description)
Cymbella suecica var. inaequalis Cleve-Euler, 1934 (original description)
Cymbella turgida var. acuminata Cleve-Euler, 1934 (original description)
Cymbella turgida var. semicircularis (Lagerstedt) Cleve-Euler, 1934 accepted as Cymbella affinis var. semicircularis Lagerstedt, 1873 (new combination reference)
Cymbella ventricosa f. minuscula Cleve-Euler, 1934 (original description)
Diploneis boldtiana var. punctata Cleve-Euler, 1934 (original description)
Diploneis elliptica var. pygmaea Cleve-Euler, 1934 (original description)
Diploneis praeclara (Pantocsek) Cleve-Euler, 1934 accepted as Navicula praeclara Pantocsek, 1892 (new combination reference)
Epithemia turgida var. westermannii (Kützing) Cleve-Euler, 1934 (new combination reference)
Eunotia attenuata Cleve-Euler, 1934 (original description)
Eunotia bactriana f. bisinuosa Cleve-Euler, 1934 (original description)
Eunotia exigua var. tenuissima Cleve-Euler, 1934 (original description)
Eunotia fallax var. dispersa Cleve-Euler, 1934 (original description)
Eunotia impressa var. directa (Cleve-Euler) Cleve-Euler, 1934 (new combination reference)
Eunotia major f. bidens (Gregory) Cleve-Euler, 1934 accepted as Himantidium bidens var. bidens Ehrenberg, 1843 (new combination reference)
Eunotia major f. constricta Cleve-Euler, 1934 (original description)
Eunotia major f. hybrida Cleve-Euler, 1934 (original description)
Eunotia major var. curta Cleve-Euler, 1934 (original description)
Eunotia major var. linearis Cleve-Euler, 1934 (original description)
Eunotia media f. elongata Cleve-Euler, 1934 (original description)
Eunotia minutissima A.Cleve, 1934 (original description)
Eunotia nymanniana var. borealis (Cleve-Euler) Cleve-Euler, 1934 accepted as Eunotia denticulata var. borealis A. Cleve, 1895 (new combination reference)
Eunotia nymanniana var. compacta (Hustedt) Cleve-Euler, 1934 (new combination reference)
Eunotia nymanniana var. hemicyclus Cleve-Euler, 1934 (original description)
Eunotia pseudoparallela Cleve-Euler, 1934 (original description)
Eunotia septentrionalis var. clevei Cleve-Euler, 1934 (original description)
Eunotia sicula Cleve-Euler, 1934 (original description)
Eunotia tanensis Cleve-Euler, 1934 (original description)
Eunotia tridentula f. tridentata Cleve-Euler, 1934 (original description)
Eunotia veneris var. exilis Cleve-Euler, 1934 (original description)
Fragilaria construens var. meniscus Cleve-Euler, 1934 (original description)
Frustulia rhomboides var. compacta Cleve-Euler, 1934 (original description)
Frustulia rhomboides var. undulata Cleve-Euler, 1934 (original description)
Gomphonema lagerheimii var. distans A.Cleve-Euler, 1934 (original description)
Gomphonema lapponicum var. lapponicum (A. Cleve) Cleve-Euler, 1934 accepted as Gomphonema angustatum var. lapponica A. Cleve, 1895 (new combination reference)
Hantzschia amphioxys var. lapponica Cleve-Euler, 1934 (original description)
Hantzschia robusta (Østrup) Cleve-Euler, 1934 accepted as Hantzschia amphioxys var. robusta Østrup, 1910 (new combination reference)
Melosira arctica var. bornholmiensis Cleve-Euler, 1934 (original description)
Melosira distans var. exigua (Cleve-Euler) Cleve-Euler, 1934 accepted as Melosira lyrata var. exigua Cleve-Euler, 1922 (new combination reference)
Melosira italica var. alpigena (Grunow) Cleve-Euler, 1934 accepted as Melosira distans f. alpigena Grunow in Van Heurck, 1882 (new combination reference)
Navicula amphibola var. asymmetrica (Lagerstedt) Cleve-Euler, 1939 accepted as Navicula punctata var. asymmetrica Lagerstedt, 1873 (new combination reference)
Navicula cari var. linearis (Østrup) Cleve- Euler, 1934 accepted as Navicula cincta var. linearis Østrup, 1910 (new combination reference)
Navicula dicephala f. constricta Cleve-Euler, 1934 (original description)
Navicula digitoradiata f. minor Cleve-Euler, 1934 (original description)
Navicula festiva f. festiva Cleve-Euler, 1934 (original description)
Navicula festiva f. latior Cleve-Euler, 1934 (original description)
Navicula fontelli Cleve-Euler, 1934 (original description)
Navicula jentzschii f. major Cleve-Euler, 1934 (original description)
Navicula jentzschii f. minor Cleve-Euler, 1934 (original description)
Navicula jentzschii f. typica Cleve-Euler, 1934 (original description)
Navicula karelica var. karelica Cleve-Euler, 1934 (original description)
Navicula kuolensis Cleve-Euler, 1934 (original description)
Navicula lacustris var. elongata Cleve-Euler, 1934 (original description)
Navicula obtusata var. aolandica Cleve-Euler, 1934 (original description)
Navicula obtusata var. obtusata (Grunow in Cleve & Grunow) Cleve, 1934 (new combination reference)
Navicula ostenfeldii f. brevissima Cleve-Euler, 1934 (original description)
Navicula peltoensis A.Cleve, 1934 (original description)
Navicula pinnularioides f. continua Cleve-Euler, 1934 (original description)
Navicula scutum var. lapponica Cleve-Euler, 1934 (original description)
Navicula stygia Cleve-Euler, 1934 (original description)
Navicula subhyalina Cleve-Euler, 1934 (original description)
Navicula subtilissima Cleve, 1891 (original description)
Navicula subtilissima var. bryophila (J.B.Petersen) Cleve-Euler, 1934 accepted as Navicula bryophila f. bryophila Boye Petersen, 1928 (new combination reference)
Navicula subveneta Cleve-Euler, 1934 (original description)