| Name | Fragilaria ulna var. danica (Keutzing) Grunow |
| Authorship | (Keutzing) Grunow |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Fragilaria ulna (Nitzsch) Lange-Bertalot |
| Remarks | Created from Taxon Name Import: Fragilaria ulna var. danica (Keutzing) Grunow |
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