Diploneis africana H.Heiden (uncertain > unassessed )
Diploneis bomboides (A.W.F.Schmidt) Cleve, 1894 accepted as Navicula bomboides var. bomboides Schmidt, 1872
Diploneis elfvingiana Fontell, 1917 (uncertain > unassessed )
Diploneis elfvingiana var. latefurcata C.W.Fontell, 1917 (uncertain > unassessed )
Diploneis latefurcata (C.W.Fontell) Cleve-Euler, 1953 accepted as Diploneis elfvingiana var. latefurcata C.W.Fontell, 1917
Diploneis oblongella (Nägeli ex Kützing) Cleve-Euler, 1922 accepted as Navicula oblongella var. oblongella Naegeli in Kutzing, 1849
Diploneis papula (A.W.F.Schmidt) Cleve, 1894
Diploneis smithi
Diploneis smithii (Brébisson) Cleve, 1894 accepted as Navicula smithii f. smithii Brébisson in W. Smith, 1856
Diploneis splendida Cleve, 1894 accepted as Navicula splendida var. splendida Gregory, 1856
Diploneis stigmosa Heiden & Kolbe, 1928 (uncertain > unassessed )
Diploneis subcincta (A.Schmidt) Cleve, 1894 accepted as Navicula subcincta f. subcincta Schmidt, 1874