| Junior homonym (allowed) | : | Navicula mutica var. gracilis Hust. (1936) | |
Ref: S.J. Brands (comp.), 1989-present: 8 Apr 2016. |
| Junior homonym (prevented) | : | Navicula mutica var. gracilis Hust. (1936) | |
Ref: Hustedt, F. 1966. Rabenhorsts Krypt.-Fl. Deutschl., Österr. u. Schweiz 7, 3 (4): 592. [new] |