| Diploneis smithii var. pumila (Grunow) Hust., 1937 |
| Diploneis smithii var. recta Peragallo, 1911 |
| Diploneis smithii var. rhombica Mereschk., 1902 |
| Diploneis splendida (W. Greg.) Cleve, 1894 |
| Diploneis splendida var. puella (Schmidt) Cleve, 1894 |
| Diploneis subadvena Hust., 1937 |
| Diploneis suborbicularis (W. Greg.) Cleve, 1894 |
| Diploneis subovalis Cleve, 1894 |
| Diploneis vacillans (A. Schmidt) Cleve, 1894 |
| Diploneis vacillans var. renitens (Schmidt) Cleve, 1894 |
| Diploneis weissflogii (A. Schmidt) Cleve, 1894 |