| Name | Cosmarium quadrum f. dilatatum Scott & Grnblad |
| Authorship | Scott; Grnblad & 1957 |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium quadrum P. Lundell |
| Remarks | Created from Taxon Name Import: Cosmarium quadrum f. dilatatum Scott & Grnblad, 1957 |
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