| Pleurosigma normanii Ralfs, 1861 |
| Pleurosigma nubecula W. Sm., 1853 |
| Pleurosigma nubecula var. genuinum Cleve-Euler, 1952 |
| Pleurosigma obtusa (Lagerst.) Perag., 1903 |
| Pleurosigma pelagicum (H. Perag.) Cleve, 1894 |
| Pleurosigma reticulatum (Norman) Hust., 1955 |
| Pleurosigma reversum Gregory, 1857 |
| Pleurosigma rhombeum Grunow, 1880 |
| Pleurosigma rigidum W. Sm., 1853 |
| Pleurosigma rigidum var. genuinum Cleve-Euler, 1952 |
| Pleurosigma rostratum Hust., 1955 |
| Pleurosigma salinarum (Grunow) Grunow, 1880 |
| Pleurosigma scalproides Rabenh., 1861 |
| Pleurosigma sciotoense Sullivant & Wormley, 1859 |
| Pleurosigma simile Grunow, 1880 |
| Pleurosigma smithii (Grunow) A. Cleve & Möller, 1879 |
| Pleurosigma strigosum W. Sm., 1852 |
| Pleurosigma strigosum var. genuinum Cleve-Euler, 1952 |
| Pleurosigmataceae Mereschk., 1903 |