Caloneis fasciata var. robusta Fontell, 1917 (original description)
Cymbella aequalis var. oblonga Fontell, 1917 (original description)
Cymbella austriaca var. robusta Fontell, 1917 (original description)
Cymbella cuspidata f. apiculata Fontell, 1917 (original description)
Cymbella cymbiformis var. nonpunctata Fontell, 1917 † (original description)
Cymbella hybrida var. capitata Fontell, 1917 (original description)
Cymbella incerta var. linearis Fontell, 1917 (original description)
Cymbella parva var. elongata Fontell, 1917 (original description)
Diploneis clevei Fontell, 1917 (original description)
Diploneis duplopunctata Fontell, 1917 (original description)
Diploneis elfvingiana Fontell, 1917 (original description)
Diploneis elfvingiana var. latefurcata C.W.Fontell, 1917 (original description)
Diploneis elliptica var. ladogensis Fontell, 1917 (original description)
Diploneis elliptica var. magnapunctata Fontell, 1917 (original description)
Diploneis ovalis var. oblongella Fontell, 1917 (original description)
Epithemia argus var. grandis Fontell, 1917 (original description)
Eunotia arcus var. elongata Fontell, 1917 (original description)
Eunotia arcus var. subalpina Fontell, 1917 (original description)
Eunotia astridae Fontell, 1917 (original description)
Eunotia astridae var. dentata Fontell, 1917 (original description)
Eunotia curta f. pumila (Grunow in Van Heurck) Fontell, 1917 (new combination reference)
Eunotia curta var. bigibba (Kützing) Fontell, 1917 accepted as Eunotia bigibba Kützing, 1849 (new combination reference)
Eunotia diodon f. constricta Fontell, 1917 (original description)
Eunotia diodon f. gibbosa Fontell, 1917 (original description)
Eunotia diodon var. diminuta Grunow, 1881 (new combination reference)
Eunotia media var. jemtlandica Font., 1917 (original description)
Eunotia parallela f. robusta Fontell, 1917 (original description)
Eunotia parallela var. densestriata Font., 1917 (original description)
Eunotia parallela var. robusta Fontell, 1917 (original description)
Eunotia praerupta f. perminuta Fontell, 1917 (original description)
Eunotia scandinavica f. angusta Fontell, 1917 (original description)
Eunotia scandinavica f. scandinavica A. Cleve in litt. Fontell, 1917 (original description)
Eunotia triodon var. elongata Fontell, 1917 (original description)
Eunotia veneris f. asymmetrica Fontell, 1917 (original description)
Gomphonema acuminatum var. biconstricta Fontell, 1917 (original description)
Hantzschia amphioxys f. densestriata Fontell, 1917 (original description)
Navicula capitata Fontell, 1917 (original description)
Navicula toulaae var. capitata Font., 1917 (original description)
Neidium dubium f. major Fontell, 1917 (original description)
Neidium dubium var. cuneata Fontell, 1917 (original description)
Nitzschia angustata sensu Fontell, 1917 (original description)
Pinnularia dactylus f. medioconstricta Fontell, 1917 (original description)
Pinnularia dactylus var. medioconstricta Fontell, 1917 (original description)
Pinnularia divergens f. linearis Fontell, 1917 (original description)
Pinnularia divergentissima var. capitata Fontell, 1917 (original description)
Pinnularia episcopalis var. robusta C.W.Fontell, 1917 (original description)
Pinnularia gracillima var. interrupta Fontell, 1917 (original description)
Pinnularia jemtlandica Fontell, 1917 (original description)
Pinnularia microstauron f. longirostris Fontell, 1917 (original description)
Pinnularia parallela var. linearis (Østrup) Fontell, 1917 accepted as Pinnularia stauroptera var. linearis Østrup, 1910 (new combination reference)
Pinnularia stomatophora f. triundulata C.W.Fontell, 1917 (original description)
Pinnularia subcapitata var. robusta Fontell, 1917 (original description)
Pinnularia viridis f. ornata Fontell, 1917 (original description)
Stauroneis anceps f. lata Font., 1917 (original description)
Stenopterobia intermedia var. capitata Fontell, 1917 (original description)
Surirella linearis f. nuda Fontell, 1917 (original description)
Surirella robusta f. constricta Fontell, 1917 (original description)
Surirella robusta f. magnipunctata Fontell, 1917 (original description)
Tetracyclus emarginatus f. abnormis Fontell, 1917 (original description)