• Agardhina prototypus Nardo
• Antarcticophyllum aequabile (Foslie) M.L. Mendoza, 1976 accepted as Clathromorphum obteculum (Foslie) Adey, 1970
• Antarcticophyllum subantarcticum (Foslie) Mendoza, 1976 accepted as Lithophyllum subantarcticum (Foslie) Foslie, 1907
• Apora polymorpha Gunnerus, 1768 accepted as Phymatolithon calcareum (Pallas) W.H. Adey & D.L. McKibbin, 1970
• Austrolithon intumescens A.S. Harvey & Woelkerling, 1995
• Boreolithon van-heurckii (Heydrich) A.S. Harvey & Woelkerling, 1995
• Chaetolithon deformans (Solms-Laubach) Foslie, 1898 accepted as Choreonema thuretii (Bornet) F. Schmitz, 1889
• Choreonema notarisii (Dufour) Foslie, 1898 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R. Mason, 1943
• Choreonema thuretii (Bornet) F. Schmitz, 1889
• Eleutherospora polymorpha (Linnaeus) Heydrich, 1900 accepted as Phymatolithon purpureum (P.L. Crouan & H.M. Crouan) Woelkerling & L.M. Irvine, 1986
• Epilithon corticiforme (Kützing) Heydrich, 1908 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Epilithon galapaganse (Foslie) Foslie accepted as Melobesia galapagensis (Foslie) W.R. Taylor, 1945
• Epilithon inaequilateralum (Solms-Laubach) Schiffner, 1916
• Epilithon marginatum (Satch. & Foslie)
• Epilithon mediocre (Foslie)Foslie
• Epilithon membranaceum (Esper) Heydrich, 1897 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Epilithon nitidum (Johnson) J.P. Beckmann & R. Beckmann
• Epilithon pustulatum (J.V. Lamouroux) M. Lemoine, 1921 accepted as Titanoderma pustulatum (J.V. Lamouroux) Nägeli, 1858
• Epilithon rosanoffii (Foslie) Foslie, 1909 accepted as Melobesia rosanoffii (Foslie) Lemoine, 1912
• Epilithon saipanense (Johnson) J.P. Beckmann & R. Beckmann, 1966
• Epilithon vallentinae Lemoine, 1915
• Epilithon vanheurckii (Heydrich) Heydrich, 1905 accepted as Boreolithon van-heurckii (Heydrich) A.S. Harvey & Woelkerling, 1995
• Epulo multipedes R.A. Townsend & Huisman, 2004
• Exilicrusta parva Y.M. Chamberlain, 1992
• Hapalidium callithamnioides P.L. Crouan & H.M. Crouan, 1859 accepted as Pneophyllum confervicolum (Kützing) Y.M. Chamberlain, 1983
• Hapalidium coccineum P.L. Crouan & H.M. Crouan, 1859 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Hapalidium confervicola (Kützing) Areschoug, 1852 accepted as Pneophyllum confervicola (Kützing) Y.M. Chamberlain, 1983
• Hapalidium confervoides (Kützing) P.L. Crouan & H.M. Crouan, 1867 accepted as Pneophyllum confervicolum (Kützing) Y.M. Chamberlain, 1983
• Hapalidium hildebrandtioides P.L. Crouan & H.M. Crouan, 1867 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Hapalidium phyllactidium Kützing, 1849 accepted as Pneophyllum confervicolum (Kützing) Y.M. Chamberlain, 1983
• Hapalidium roseolum Kützing, 1843 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Hapalidium roseum Kützing ex Areschoug, 1852 accepted as Melobesia membranacea (Esper) J.V. Lamouroux, 1812
• Hapalidium zonale P.L. Crouan & H.M. Crouan, 1859 accepted as Pneophyllum zonale (P.L. Crouan & H.M. Crouan) Y.M. Chamberlain, 1983
• 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