| Name | Fragilaria ulna f. angustissima (Grunow) Krammer & Lange-Bertalot |
| Authorship | (Grunow) Krammer & Lange-Bertalot |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Fragilaria ulna (Nitzsch) Lange-Bertalot |
| Remarks | Created from Taxon Name Import: Fragilaria ulna f. angustissima (Grunow) Krammer & Lange-Bertalot |
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