| Name | Cosmarium hornavanense f. helvetica Ducellier |
| Authorship | Ducellier |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium hornavanense Gutwinski |
| Remarks | Created from Taxon Name Import: Cosmarium hornavanense f. helvetica Ducellier, 1918 |
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