Bacillaria tenuis (C.Agardh) Tomosvary, 1879 | Bacillaria tenuis var. elongata (Lyngb.) Tömösváry, 1879 | Candollella tenuis (C.Agardh) Gaillon, 1833 | Diatoma elongata tenuis (C.Agardh) Skabichevskii, 1960 | Diatoma elongata var. tenue (C.Agardh) van Heurck, 1885 | Diatoma elongata var. tenuis (C.Agardh) van Heurck, 1885 | Diatoma elongatum (Lyngb.) C.Agardh, 1824 | Diatoma flocculosa var. tenuis (C.Agardh) C.Agardh, 1817 | Lobarzewskya elongata (Lyngb.) Trevisan, 1848 | Neodiatoma elongata (Lyngb.) Kuntze, 1891 | Odontidium elongatum (Lyngb.) Elmore, 1921 | Odontidium elongatum var. tenuis (C.Agardh) Patrick, 1939