| Diploneis eudoxia (A.W.F. Schmidt) E. Jørg., 1905 |
| Diploneis finnica (Ehrenb.) Cleve, 1891 |
| Diploneis finnica var. genuina Cleve-Euler, 1953 |
| Diploneis fontanella Lange-Bert., 2004 |
| Diploneis fusca (W. Greg.) Cleve, 1894 |
| Diploneis fusca var. pelagi (A.W.F. Schmidt) Cleve, 1894 |
| Diploneis gemmata (Grev.) Cleve, 1894 |
| Diploneis gemmatula (Grunow) Cleve, 1894 |
| Diploneis gruendleri (A.W.F. Schmidt) Cleve, 1894 |
| Diploneis hudsonis (Grunow) Cleve, 1894 |
| Diploneis incurvata (W. Greg.) Cleve, 1894 |
| Diploneis interrupta (Kütz.) Cleve, 1894 |
| Diploneis lineata (Donk.) Cleve, 1894 |
| Diploneis litoralis (Donk.) Cleve, 1894 |
| Diploneis litoralis var. clathrata (Østrup) Cleve, 1896 |
| Diploneis marginestriata Hust., 1922 |
| Diploneis mediterranea (Grunow) Cleve, 1894 |
| Diploneis mereschkowskyi Lange-Bert., Fuhrmann & Werum, 2020 |
| Diploneis minuta J.B.Petersen, 1928 |
| Diploneis modica Hust., 1945 |