| Name | Cosmarium abbreviatum var. planctonicum West & G.S West |
| Authorship | West & G. S. West |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium abbreviatum Raciborski |
| Remarks | Created from Taxon Name Import: Cosmarium abbreviatum var. planctonicum West & G.S West |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cosmarium abbreviatum var. planctonicum West & G.S West |
| Identification made in | [no date] (1) |