• Blidingia Kylin, 1947
• Blidingia chadefaudii (Feldmann) Bliding, 1963
• Blidingia cornuta Steinhagen & Weinberger, 2021
• Blidingia dawsonii (Hollenberg & I.A.Abbott) S.C.Lindstrom, L.A.Hanic & L.Golden, 2006
• Blidingia groenlandica (J.Agardh) K.L.Vinogradova, 1968 accepted as Pseudothrix groenlandica (J.Agardh) Hanic & S.C.Lindstrom, 2008
• Blidingia marginata (J.Agardh) P.J.L.Dangeard ex Bliding, 1963
• Blidingia marginata subsp. subsalsa (Kjellmann) Bliding, 1963 accepted as Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al., 1989
• Blidingia marginata var. longior Gallardo et al. (uncertain)
• Blidingia minima (Nägeli ex Kützing) Kylin, 1947
• Blidingia minima f. subsalsa (Kjellman) K.L.Vinogradova, 1974 accepted as Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al., 1989
• Blidingia minima var. capillaris Schiffner, 1993 (uncertain)
• Blidingia minima var. elongata Schiffner, 1993 (uncertain)
• Blidingia minima var. ramifera Bliding, 1963 accepted as Blidingia ramifera (Bliding) Garbary & L.B.Barkhouse, 1987
• Blidingia minima var. ramosa Schiffner, 1993 (uncertain)
• Blidingia minima var. stolonifera Garbary & C.Tam, 1989
• Blidingia minima var. subsalsa (Kjellman) Scagel, 1957 accepted as Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al., 1989
• Blidingia minima var. vexata (Setchell & N.L.Gardner) J.N.Norris, 1971
• Blidingia nana (Sommerfelt) Bliding, 1963 accepted as Blidingia minima (Nägeli ex Kützing) Kylin, 1947
• Blidingia ramifera (Bliding) Garbary & L.B.Barkhouse, 1987 (uncertain)
• Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al., 1989
• Blidingia tuberculosa (P.J.L.Dangeard) Benhissoune, Boudouresque & Verlaque, 2001