| Name | Closterium ralfsii f. sigmoideum T.J.C.Irne-Marie, |
| Authorship | T.J.C.Irénée-Marie |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Closterium ralfsii Brébisson ex Ralfs |
| Remarks | Created from Taxon Name Import: Closterium ralfsii f. sigmoideum T.J.C.Irne-Marie, |
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