| Name | Synedra ulna var. claviceps Hustedt |
| Authorship | Hustedt |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Synedra ulna (Nitzsch) Ehrenberg |
| Remarks | Created from Taxon Name Import: Synedra ulna var. claviceps Hustedt |
| Citation | 1937 Arch. Hydrobiol. Suppl. 15: 157, pl. 10, fig. 36 |
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