• Lithothamnion Heydrich, 1897
• Lithothamnion absonum Foslie, 1907 accepted as Phymatolithon repandum (Foslie) Wilks & Woelkerling, 1994
• Lithothamnion acervatum Foslie, 1907 accepted as Leptophytum acervatum (Foslie) Y.M. Chamberlain & Keats, 1994
• Lithothamnion aculeiferum L.R. Mason, 1943
• Lithothamnion adeyi P.W. Gabrielson, T.B. Widdowson, S.C. Lindstrom, M.W. Hawkes & R.F. Scagel, 2000
• Lithothamnion adplicitum Foslie, 1897 accepted as Titanoderma pustulatum (J.V. Lamouroux) Nägeli, 1858
• Lithothamnion aemulans Foslie & M.A. Howe accepted as Mesophyllum aemulans (Foslie & M.A. Howe) W.H. Adey, 1970
• Lithothamnion affine Foslie, 1897 accepted as Lithophyllum kotschyanum Unger, 1858
• Lithothamnion agariciforme Foslie, 1898 accepted as Mesophyllum lichenoides (J. Ellis) Me. Lemoine, 1928
• Lithothamnion album Heydrich, 1897
• Lithothamnion alcicorne Kjellman, 1883 accepted as Lithothamnion tophiforme (Esper) Unger, 1858
• Lithothamnion amplexifrons (Harvey) Lemoine ex Taylor, 1960
• Lithothamnion andrussowii K.N. Deckenbach
• Lithothamnion angolense Romanes
• Lithothamnion annulatum Foslie, 1906 accepted as Phymatolithon lenormandii (J.E. Areschoug) W.H. Adey, 1966
• Lithothamnion antarcticum (J.D. Hooker & Harvey) Heydrich, 1901
• Lithothamnion apiculatum Foslie, 1895 accepted as Lithothamnion fornicatum Foslie, 1891
• Lithothamnion arcticum (Kjellman) Foslie, 1900 accepted as Mesophyllum arcticum (Kjellman) Athanasiadis, 1996
• Lithothamnion asperulum (Foslie) Foslie, 1907 accepted as Phymatolithon repandum (Foslie) Wilks & Woelkerling, 1994
• Lithothamnion aucklandicum (Foslie) Foslie, 1907
• Lithothamnion australe Foslie, 1904
• Lithothamnion bamleri Heydrich, 1897 accepted as Lithophyllum bamleri (Heydrich) Heydrich, 1897
• Lithothamnion bandanum Foslie, 1904
• Lithothamnion battersii Foslie, 1896 accepted as Lithothamnion glaciale Kjellman, 1883
• Lithothamnion betieri M. Lemoine, 1939
• Lithothamnion bisporum Foslie, 1906 accepted as Leptophytum bisporum (Foslie) Adey, 1970
• Lithothamnion boreale Foslie, 1891 accepted as Lithothamnion glaciale Kjellman, 1883
• Lithothamnion bornetii Foslie, 1899 accepted as Leptophytum bornetii (Foslie) Adey, 1970
• Lithothamnion botrytoides Foslie, 1898 accepted as Lithothamnion glaciale Kjellman, 1883
• Lithothamnion bourcartii Lemoine, 1924 †
• Lithothamnion brachycladum Foslie, 1900 accepted as Mesophyllum brachycladum (Foslie) W.H. Adey, 1970
• Lithothamnion brasilense accepted as Lithothamnion brasiliense Foslie, 1900
• Lithothamnion brasiliense Foslie, 1900
• Lithothamnion brassica-florida (Harvey) Areschoug, 1852 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R. Mason, 1943
• Lithothamnion breviaxe Foslie, 1895
• Lithothamnion byssoides (Lamarck) Philippi, 1837 accepted as Lithophyllum byssoides (Lamarck) Foslie, 1900
• Lithothamnion calcareum (Pallas) Areschoug, 1852 accepted as Phymatolithon calcareum (Pallas) W.H. Adey & D.L. McKibbin, 1970
• Lithothamnion californicum Foslie, 1900
• Lithothamnion canariense Foslie, 1906
• Lithothamnion capense (Rosanoff) Foslie, 1898 accepted as Lithophyllum capense Rosanoff, 1866 accepted as Synarthrophyton patena (J.D. Hooker & Harvey) R.A. Townsend, 1979
• Lithothamnion cardinellense P. Fravega, M. Piazza & G. Vannucci, 1993
• Lithothamnion carolii Me. Lemoine, 1920
• Lithothamnion carpoklonion A. Athanasiadis & D.L. Ballantine, 2011
• Lithothamnion chatamense Foslie, 1906 accepted as Mesophyllum chatamense (Foslie) W.H. Adey
• Lithothamnion chathamense Foslie, 1906
• Lithothamnion circumscriptum Strömfelt, 1886 accepted as Clathromorphum circumscriptum (Strömfelt) Foslie, 1898
• Lithothamnion coalescens Foslie, 1895 accepted as Clathromorphum compactum (Kjellman) Foslie, 1898
• Lithothamnion colliculosum Foslie, 1891 accepted as Lithothamnion glaciale Kjellman, 1883
• Lithothamnion compactum Kjellman, 1883 accepted as Clathromorphum compactum (Kjellman) Foslie, 1898
• Lithothamnion conchatum Setchell & Foslie, 1902 accepted as Mesophyllum conchatum (Setchell & Foslie) W.H. Adey, 1970
• Lithothamnion congregatum Foslie, 1895 accepted as Lithothamnion nodulosum Foslie, 1895
• Lithothamnion corallinaeforme Lemoine, 1924 †
• Lithothamnion corallioides (P.L. Crouan & H.M. Crouan) P.L. Crouan & H.M. Crouan, 1867
• Lithothamnion coralloides accepted as Lithothamnion corallioides (P.L. Crouan & H.M. Crouan) P.L. Crouan & H.M. Crouan, 1867
• Lithothamnion corticiforme (Kützing) Foslie, 1898 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Lithothamnion cottonii M. Lemoine, 1929
• Lithothamnion coulmanicum Foslie, 1905
• Lithothamnion crassiusculum (Foslie) L.R. Mason, 1943
• Lithothamnion crassum Philippi, 1837
• Lithothamnion crenulatum (Foslie) Foslie, 1907 accepted as Mesophyllum schmitzii (Hariot) Mendoza, 1977
• Lithothamnion crispatum Hauck, 1878
• Lithothamnion cystocarpideum Foslie, 1906 accepted as Mesophyllum cystocarpideum (Foslie) W.H. Adey, 1970
• Lithothamnion darwinii (Harvey) Areschoug, 1852
• Lithothamnion decipiens Foslie, 1897 accepted as Spongites decipiens (Foslie) Y.M. Chamberlain, 1993
• Lithothamnion decussatum Foslie, 1895 accepted as Sphaeranthera decussata (Foslie) Heydrich
• Lithothamnion decutescens Heydrich, 1901 accepted as Goniolithon decutescens (Heydrich) Foslie ex M.A. Howe, 1918
• Lithothamnion deformans (Solms-Laubach) Foslie, 1898 accepted as Choreonema thuretii (Bornet) F. Schmitz, 1889
• Lithothamnion dehiscens Foslie, 1895
• Lithothamnion delapsum
• Lithothamnion dentatum (Kützing) Areschoug, 1851 accepted as Lithophyllum dentatum (Kützing) Foslie, 1900
• Lithothamnion depressum P.L. Crouan & H.M. Crouan, 1867 accepted as Lithophyllum incrustans R.A. Philippi, 1837
• Lithothamnion dickei Foslie, 1900 accepted as Mesophyllum imbricatum (Dickie) W.H. Adey, 1970
• Lithothamnion diguetii Hariot, 1895
• Lithothamnion dimorphum Foslie, 1895 accepted as Lithothamnion fornicatum Foslie, 1891
• Lithothamnion discrepans Foslie, 1907 accepted as Mesophyllum engelhartii (Foslie) W.H. Adey, 1970
• Lithothamnion dissidens (Foslie) Foslie, 1907
• Lithothamnion divergens Foslie, 1895 accepted as Lithothamnion tophiforme (Esper) Unger, 1858
• Lithothamnion durum Kjellman, 1889
• Lithothamnion ectocarpon Foslie, 1907
• Lithothamnion elegans Foslie, 1895 accepted as Lithophyllum elegans (Foslie) Foslie, 1900
• Lithothamnion emboloides Heydrich, 1900 accepted as Phymatolithon laevigatum (Foslie) Foslie, 1898
• Lithothamnion engelhartii Foslie, 1900 accepted as Mesophyllum engelhartii (Foslie) W.H. Adey, 1970
• Lithothamnion erubescens Foslie, 1900 accepted as Mesophyllum erubescens (Foslie) Me. Lemoine, 1928
• Lithothamnion erythraeum Rothpletz, 1893 accepted as Sporolithon erythraeum (Rothpletz) Kylin, 1956
• Lithothamnion esperi Heydrich, 1897
• Lithothamnion evanescens Foslie, 1895 accepted as Clathromorphum circumscriptum (Strömfelt) Foslie, 1898
• Lithothamnion exasperatum Foslie, 1907 accepted as Mesophyllum exasperatum (Foslie) W.H. Adey, 1970
• Lithothamnion expansum (Philippi) Foslie, 1895 accepted as Mesophyllum expansum (Philippi) Cabioch & M.L. Mendoza, 2003
• Lithothamnion falsellum
• Lithothamnion fasciculatum (Lamarck) Areschoug, 1852 accepted as Lithophyllum fasciculatum (Lamarck) Foslie, 1898
• Lithothamnion ferox Foslie, 1907 accepted as Leptophytum ferox (Foslie) Y.M. Chamberlain & Keats, 1994
• Lithothamnion flabellatum Rosenvinge, 1893 accepted as Lithothamnion tophiforme (Esper) Unger, 1858
• Lithothamnion flavescens Kjellman, 1883
• Lithothamnion floridanum Foslie, 1906 accepted as Mesophyllum floridanum (Foslie) W.H. Adey ex M.J. Wynne, 1986
• Lithothamnion foecundum Kjellman, 1883 accepted as Leptophytum foecundum (Kjellman) Adey, 1966
• Lithothamnion fornicatum Foslie, 1891
• Lithothamnion fosliei Heydrich, 1897 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R. Mason, 1943
• Lithothamnion fragiissimum Foslie, 1904
• Lithothamnion fretense Foslie, 1907 accepted as Lithothamnion japonicum Foslie, 1900
• Lithothamnion fruticulosum (Kützing) Foslie, 1895 accepted as Spongites fruticulosus Kützing, 1841