• Garovaglia muscicola (Sw.) Trevis., 1853 accepted as Polychidium muscicola (Sw.) Gray, 1821
• Garovaglina microscopica (Nyl.) Trevis., 1880 accepted as Leptogium teretiusculum (Flörke) Arnold, 1892
• Leptodendriscum byssoides (Carrington) Vain., 1921 accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptodendriscum moorei (Hepp ex Leight.) Vain., 1921 accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptogidiomyces dendrisci Cif. & Tomas., 1954 accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptogidium byssoides (Carrington) Zahlbr., 1924 accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptogidium dendriscum (Nyl.) Nyl., 1873 accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptogidium moorei sensu auct., non Nyl. accepted as Polychidium dendriscum (Nyl.) Henssen, 1963
• Leptogidium umhausense (Auersw.) Henssen accepted as Lobaria amplissima (Scop.) Forssell, 1883
• Massalongia carnosa (Dicks.) Körb., 1855
• Massalongia cheilea (Nyl.) Mudd, 1861 accepted as Fuscopannaria leucophaea (Vahl) P.M. Jørg., 1994
• Pilonema heteromalla (Sm.) Nyl., 1860
• Polychidium amphineum (Nyl.) Trevis., 1880 accepted as Leptogium byssinum (Hoffm.) Zwackh ex Nyl., 1856
• Polychidium byssinum (Hoffm.) Trevis., 1890 accepted as Leptogium byssinum (Hoffm.) Zwackh ex Nyl., 1856
• Polychidium contortum Henssen, 1963
• Polychidium cretaceum (Sm.) Trevis., 1880 accepted as Leptogium biatorinum (Nyl.) Leight., 1879
• Polychidium dendriscum (Nyl.) Henssen, 1963
• Polychidium humosum (Nyl.) Trevis., 1880 accepted as Leptogium tenuissimum (Hoffm.) Körb., 1855
• Polychidium muscicola (Sw.) Gray, 1821
• Polychidium pulvinatum (Eitner) R. Sant., 1993 accepted as Polycoccum pulvinatum (Eitner) R. Sant., 1993
• Polychidium pusillum (Nyl.) Trevis., 1880 accepted as Leptogium biatorinum (Nyl.) Leight., 1879
• Polychidium schraderi (Bernh.) Gray, 1821 accepted as Leptogium schraderi (Bernh.) Nyl., 1856
• Polychidium simplex (Davies) Vezda accepted as Polysporina simplex (Davies) Vezda, 1978
• Polychidium spongiosum (Huds.) Gray, 1821 accepted as Solorina spongiosa (Huds.) Anzi, 1862
• Polychidium subtile (Schrad.) Gray, 1821 accepted as Leptogium subtile (Schrad.) Torss., 1843
• Polychidium tenuissimum (Hoffm.) Gray, 1821 accepted as Leptogium tenuissimum (Hoffm.) Körb., 1855
• Polychidium umhausense (Auersw.) Henssen, 1963 accepted as Lobaria amplissima (Scop.) Forssell, 1883
• Polychidium velutinum (Ach.) Gray, 1821 accepted as Thermutis velutina (Ach.) Flot., 1850