• Rhizosolenia alata (H. Peragallo) Margalef & Durán, 1953 accepted as Rhizosolenia indica H.Peragallo, 1892
• Rhizosolenia alata Brightwell, 1858 accepted as Proboscia alata (Brightwell) Sundström, 1986
• Rhizosolenia alata f. alata Brightwell, 1858 (uncertain > unassessed)
• Rhizosolenia alata f. corpulenta (Cleve) Peragallo & Peragallo, 1897-1908 accepted as Rhizosolenia alata var. corpulenta Cleve, 1897
• Rhizosolenia alata f. curvirostris (Jousé) Jousé, 1961 (uncertain > unassessed)
• Rhizosolenia alata f. curvirostris Gran, 1900 (uncertain > unassessed)
• Rhizosolenia alata f. digitata Dangeard, 1927 (uncertain > unassessed)
• Rhizosolenia alata f. gallaecica Osorio-Tafall, 1936 (uncertain > unassessed)
• Rhizosolenia alata f. genuina Gran, 1908 (uncertain > unassessed)
• Rhizosolenia alata f. gracillima (Cleve) Gran, 1908 accepted as Rhizosolenia gracillima Cleve, 1881
• Rhizosolenia alata f. indica (H.Peragallo) Gran, 1905 accepted as Rhizosolenia indica H.Peragallo, 1892
• Rhizosolenia alata f. indica Nothig, 1988 accepted as Proboscia truncata (G.Karsten) Nöthig & Ligowski, 1991 accepted as Rhizosolenia truncata G.Karsten, 1905
• Rhizosolenia alata f. inermis (Castracane) Hustedt, 1930 (uncertain > unassessed)
• Rhizosolenia alata f. serpentina Wawrik, 1960 (uncertain > unassessed)
• Rhizosolenia alata var. alata accepted as Proboscia alata f. alata (Brightwell) Sündstrom, 1986
• Rhizosolenia alata var. corpulenta Cleve, 1897 (uncertain > unassessed)
• Rhizosolenia alata var. gracillima (Cleve) Grunow ex Van Heurck, 1880 accepted as Rhizosolenia gracillima Cleve, 1881
• Rhizosolenia alata var. indica (H. Peragallo) Ostenfeld in Ostenfeld & Schmidt, 1901 accepted as Rhizosolenia indica H.Peragallo, 1892
• Rhizosolenia alata var. inermis (Castracane) Mangin, 1914 (1915) (uncertain > unassessed)
• Rhizosolenia alata var. truncata Gran, 1897 (uncertain > unassessed)