| 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) |