| Nominal Species (n = 29) | Present allocation (n = 29) | Ref. |
|---|---|---|
| Pleurosigma acutum Norman ex Ralfs | Pleurosigma acutum | 80701 |
| Rhoicosigma arcticum Cleve | Rhoicosigma arcticum | 80701 |
| Gyrosigma cali Reid, G. | Gyrosigma cali | 80701 |
| Pleurosigma decorum W. Smith | Pleurosigma decorum | 80701 |
| Pleurosigma delicatulum W. Smith | Pleurosigma delicatulum | 80701 |
| Gyrosigma diaphanum Cleve | Gyrosigma diaphanum | 80701 |
| Pleurosigma directum Grunow | Pleurosigma directum | 80701 |
| Pleurosigma distortum W. Smith | Pleurosigma distortum | 80701 |
| Pleurosigma diversestriatum Meister, 1934 (1935) | Pleurosigma diversestriatum | 3477 |
| Gyrosigma elongatum W. Smith | Gyrosigma elongatum | 80701 |
| Pleurosigma elongatum W. Smith | Pleurosigma elongatum | 80701 |
| Gyrosigma euhippus F. A. S. Sterrenburg & R. Ross | Gyrosigma euhippus | 80701 |
| Pleurosigma falcatum Donkin | Pleurosigma falcatum | 80701 |
| Toxonidea gregoriana Donkin | Toxonidea gregoriana | 80701 |
| Toxonidea insignis Donkin | Toxonidea insignis | 80701 |
| Pleurosigma intermedium W. Smith | Pleurosigma intermedium | 80701 |
| Pleurosigma minutum Donkin | Pleurosigma minutum | 80701 |
| Gyrosigma murphyi Reid, G. | Gyrosigma murphyi | 80701 |
| Pleurosigma naviculaceum Brébisson | Pleurosigma naviculaceum | 80701 |
| Pleurosigma normanii Ralfs | Pleurosigma normanii | 80701 |
| Pleurosigma peisonis Grunow | Pleurosigma peisonis | 80701 |
| Rhoicosigma reichardtianum Grunow | Rhoicosigma reichardtianum | 80701 |
| Pleurosigma rigidum W. Smith | Pleurosigma rigidum | 80701 |
| Pleurosigma simonsenii G. R. Hasle | Pleurosigma simonsenii | 80701 |
| Pleurosigma spencerii Grunow | Pleurosigma spencerii | 80701 |
| Pleurosigma strigilis W. Smith | Pleurosigma strigilis | 80701 |
| Pleurosigma strigosum W. Smith | Pleurosigma strigosum | 80701 |
| Gyrosigma temperei Cleve | Gyrosigma temperei | 80701 |
| Toxonidea undulata G. Norman ex Ralfs | Toxonidea undulata | 80701 |