| Carinasigma G. Reid, 2012 |
| Carinasigma rectum (Donkin) G. Reid, 2012 |
| Donkinia Ralfs, 1861 |
| Donkinia carinata (Donk.) Ralfs, 1861 |
| Donkinia recta (Donk.) Grunow, 1883 |
| Donkinia thumii Cleve, 1894 |
| Gyrosigma Hassall, 1845 |
| Gyrosigma acuminatum (Kütz.) Rabenh., 1853 |
| Gyrosigma acuminatum var. lacustre (W. Sm.) Meister, 1912 |
| Gyrosigma attenuatum (Kütz.) Cleve, 1894 |
| Gyrosigma attenuatum (Kütz.) Rabenh., 1853 |
| Gyrosigma balticum (Ehrenb.) Rabenh., 1853 |
| Gyrosigma beaufortianum Hust., 1955 |
| Gyrosigma compactum (Grev.) Cleve, 1894 |
| Gyrosigma delicatulum (W. Sm.) J.W. Griff. & Henfr., 1856 |
| Gyrosigma distortum (W. Sm.) Cleve, 1894 |
| Gyrosigma distortum var. brevirostrum Brockmann, 1950 |
| Gyrosigma distortum var. distortum (W. Sm.) Cleve, 1894 |
| Gyrosigma distortum var. marinum Cleve-Euler, 1952 |
| Gyrosigma elongatum (W. Sm.) J.W. Griff. & Henfr., 1856 |