| Name | Vallithidium marginulatum Nienow & A. K. S. Prasad |
| Authorship | Nienow & A. K. S. Prasad |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Vallithidium Nienow & A. K. S. Prasad |
| Citation | 2023 Diatom Res. 38(3): 148 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Vallithidium marginulatum Nienow & A. K. S. Prasad |
| Identification made in | [no date] (3) |