| Name | Cosmarium lagerheimianum (W. B. Turner) A. M. Scott & Prescott |
| Authorship | (W. B. Turner) A. M. Scott & Prescott |
| Rank | Species |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Cosmarium |
| Citation | 1961 Hydrobiologia 17(1/2): 60 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cosmarium lagerheimianum (W. B. Turner) A. M. Scott & Prescott |
| Identification made in | [no date] (1) |