Caloneis latiuscula var. parvula Zanon, 1941 (original description)
Cymbella acuta var. minor Zanon, 1941 (original description)
Cymbella eburnea Zanon, 1941 (original description)
Eunotia monodon var. maxima Zanon, 1941 (original description)
Frustulia vulgaris var. minor Zanon, 1941 (original description)
Navicula eburnea Zanon, 1941 (original description)
Navicula pupula f. undulata Zanon, 1941 (original description)
Nitzschia eburnea Zanon, 1941 (original description)
Pinnularia borealis var. constricta (Zanon) Cholnoky, 1960 accepted as
Pinnularia lata var. constricta Zanon, 1938 (original description)
Pinnularia braunii var. oboesa Zanon, 1941 (original description)
Pinnularia conferta Zanon, 1941 (original description)
Pinnularia crucifera V.Zanon, 1941 (original description)
Pinnularia divergens var. attenuato-constricta Zanon, 1941 (original description)
Pinnularia eburnea var. eburnea (Carlson) Zanon, 1941 accepted as
Pinnularia eburnea var. minor Zanon, 1941 (new combination reference)
Pinnularia eburnea var. minor Zanon, 1941 (original description)
Pinnularia gibba var. eburnea Zanon, 1941 (original description)
Pinnularia guineensis Zanon, 1941 (original description)
Pinnularia maior var. dolabrifera Zanon, 1941 (original description)
Pinnularia microstauron var. dahomeyensis Zanon, 1941 (original description)
Pinnularia minuta Zanon, 1941 (original description)
Pinnularia molaris var. brevis Zanon, 1941 (original description)
Pinnularia panduriformis Zanon, 1941 (original description)
Pinnularia rhomboidea Zanon, 1941 (original description)
Pinnularia subcapitata var. abbreviata Zanon, 1941 (original description)
Pinnularia sudanensis Zanon, 1941 (original description)
Stauroneis obtusa var. minor Zanon, 1941 (original description)
Synedra undulata f. rigida Zanon, 1941 (original description)