• Melobesia Foslie, 1898 accepted as Hydrolithon (Foslie) Foslie, 1909
• Melobesia Heydrich, 1897 accepted as Lithophyllum Philippi, 1837
• Melobesia J.V.Lamouroux, 1812
• Melobesia accola (Foslie) Me.Lemoine, 1924
• Melobesia affinis (Foslie) Me.Lemoine, 1917
• Melobesia agariciformis Areschoug, 1851 accepted as Lithophyllum dentatum (Kützing) Foslie, 1898
• Melobesia amplexifrons Harvey, 1849 accepted as Pneophyllum amplexifrons (Harvey) Y.M.Chamberlain & R.E.Norris, 1994
• Melobesia antarctica (J.D.Hooker & Harvey) J.D.Hooker & Harvey, 1849 accepted as Carlskottsbergia antarctica (J.D.Hooker & Harvey) Athanasiadis, 2018
• Melobesia bermudensis Foslie, 1901 accepted as Lithoporella bermudensis (Foslie) W.H.Adey, 1970
• Melobesia brassica-florida Harvey, 1849 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R.Mason, 1943
• Melobesia calcarea (Pallas) Harvey, 1849 accepted as Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkering & L.M.Irvine, 1986
• Melobesia callithamnioides (P.Crouan & H.Crouan) Falkenberg, 1879 accepted as Pneophyllum confervicola (Kützing) Y.M.Chamberlain, 1983
• Melobesia callithamnioides Falkenberg ex Solms-Laubach, 1881 accepted as Hydrolithon boreale (Foslie) Y.M.Chamberlain, 1994
• Melobesia canescens Foslie, 1900 accepted as Titanoderma canescens (Foslie) Woelkerling, Y.M.Chamberlain & P.C.Silva, 1985 accepted as Lithophyllum canescens (Foslie) Foslie, 1905
• Melobesia carpophylli Heydrich, 1893 accepted as Lithophyllum carpophylli (Heydrich) Heydrich, 1897
• Melobesia caspica Foslie, 1899 accepted as Lithophyllum pustulatum (J.V.Lamouroux) Foslie, 1904 accepted as Titanoderma pustulatum (J.V.Lamouroux) Nägeli, 1858
• Melobesia caulerpae Foslie, 1906 accepted as Pneophyllum coronatum (Rosanoff) Penrose, 1994
• Melobesia chamaedoris (Foslie & M.A.Howe) Foslie, 1908 accepted as Hydrolithon chamaedoris (Foslie & M.Howe) M.J.Wynne, 2005
• Melobesia coccinea (P.L.Crouan & H.M.Crouan) Foslie, 1898 accepted as Melobesia membranacea (Esper) J.V.Lamouroux, 1812
• Melobesia compressa M'Calla ex Harvey, 1849 accepted as Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkering & L.M.Irvine, 1986
• Melobesia confervicola (Kützing) Foslie, 1900 accepted as Pneophyllum confervicola (Kützing) Y.M.Chamberlain, 1983
• Melobesia confervoides Funk, 1955
• Melobesia confinis P.Crouan & H.Crouan, 1867 accepted as Titanoderma pustulatum (J.V.Lamouroux) Nägeli, 1858
• Melobesia corallinae P.Crouan & H.Crouan, 1867 accepted as Lithophyllum corallinae (P.Crouan & H.Crouan) Heydrich, 1897
• Melobesia coronata Rosanoff, 1866 accepted as Pneophyllum coronatum (Rosanoff) Penrose, 1994
• Melobesia corticiformis Kützing, 1849 accepted as Melobesia membranacea (Esper) J.V.Lamouroux, 1812
• Melobesia crassa Lloyd, 1860 accepted as Lithophyllum tortuosum f. crassa (Lloyd) Me.Lemoine
• Melobesia crassiuscula Kützing, 1843 accepted as Amphithallia crassiuscula (Kützing) Athanasiadis, 2019
• Melobesia cristata (Meneghini) Ardissone, 1883 accepted as Tenarea tortuosa (Esper) Me.Lemoine, 1910
• Melobesia crustacea (Kützing) Rabenhorst, 1847 (uncertain)
• Melobesia cymodoceae Foslie, 1901 accepted as Hydrolithon cymodoceae (Foslie) Penrose, 1992
• Melobesia cystoseirae Hauck, 1883 accepted as Lithophyllum cystoseirae (Hauck) Heydrich, 1897
• Melobesia darwinii Harvey, 1849 accepted as Lithothamnion darwinii (Harvey) Areschoug, 1852
• Melobesia decipiens Foslie, 1897 accepted as Pseudolithophyllum decipiens (Foslie) Steneck & R.T.Paine, 1986 accepted as Spongites decipiens (Foslie) Y.M. Chamberlain, 1993 accepted as Chamberlainium decipiens (Foslie) Caragnano, Foetisch, Maneveldt & Payri, 2018
• Melobesia decussata Endlicher, 1843 accepted as Lithophyllum decussatum (J.Ellis & Solander) Philippi, 1837
• Melobesia deformans Solms-Laubach, 1881 accepted as Choreonema thuretii (Bornet) F.Schmitz, 1889
• Melobesia dentata (Kützing) Decaisne, 1842 accepted as Lithophyllum dentatum (Kützing) Foslie, 1898
• Melobesia exasperata Duchassaing, 1850 (uncertain)
• Melobesia expansa (Philippi) Endlicher, 1843 accepted as Mesophyllum expansum (Philippi) Cabioch & M.L.Mendoza, 2003
• Melobesia explanata (Foslie) Foslie, 1908 accepted as Lithophyllum riosmenae A.S.Harvey & Woelkerling, 2009
• Melobesia farinosa J.V.Lamouroux, 1816 accepted as Hydrolithon farinosum (J.V.Lamouroux) Penrose & Y.M.Chamberlain, 1993
• Melobesia farinosa f. borealis Foslie, 1905 accepted as Hydrolithon boreale (Foslie) Y.M.Chamberlain, 1994
• Melobesia farinosa f. callithamnioides Foslie, 1905 accepted as Hydrolithon boreale (Foslie) Y.M.Chamberlain, 1994
• Melobesia farinosa f. mauritiana Foslie, 1905
• Melobesia farinosa var. borealis (Foslie) Me. Lemoine ex Lily Newton, 1931 accepted as Hydrolithon boreale (Foslie) Y.M.Chamberlain, 1994
• Melobesia farinosa var. solmsiana (Falkenberg) Me.Lemoine, 1917 accepted as Hydrolithon boreale (Foslie) Y.M.Chamberlain, 1994
• Melobesia fasciculata (Lamarck) Harvey, 1846 accepted as Lithophyllum fasciculatum (Lamarck) Foslie, 1898
• Melobesia fertilis Me.Lemoine, 1930 accepted as Fosliella fertilis (Me.Lemoine) Segonzac, 1984
• Melobesia flabellata Sonder, 1845 accepted as Metamastophora flabellata (Sonder) Setchell, 1943
• Melobesia foliacea Kützing, 1843 accepted as Mastophora rosea (C.Agardh) Setchell, 1943
• Melobesia fosliei Rosenvige, 1917 accepted as Pneophyllum confervicola (Kützing) Y.M.Chamberlain, 1983
• Melobesia frondosa Dufour, 1861 accepted as Lithophyllum stictiforme (J.E. Areschoug) Hauck, 1877
• Melobesia fruticulosa (Kützing) Decaisne, 1842 accepted as Spongites fruticulosus Kützing, 1841
• Melobesia fucicola Bertoloni, 1867 (uncertain)
• Melobesia galapagensis (Foslie) W.R.Taylor, 1945
• Melobesia gibbsii Setchell & Foslie, 1907 accepted as Heteroderma gibbsii (Setchell & Foslie) Foslie, 1909
• Melobesia grandiuscula Montagne, 1846 accepted as Lithophyllum stictiforme (J.E. Areschoug) Hauck, 1877
• Melobesia granulata Meneghini ex Kützing, 1849 accepted as Hydrolithon farinosum (J.V.Lamouroux) Penrose & Y.M.Chamberlain, 1993
• Melobesia hapalidioides P.Crouan & H.Crouan, 1867 accepted as Lithophyllum pustulatum (J.V.Lamouroux) Foslie, 1904 accepted as Titanoderma pustulatum (J.V.Lamouroux) Nägeli, 1858
• Melobesia hildebrantioides (P.Crouan & H.Crouan) Foslie, 1898 accepted as Melobesia membranacea (Esper) J.V.Lamouroux, 1812
• Melobesia inaequilaterata Solms-Laubach, 1881
• Melobesia indica (Foslie) Jadin, 1935 accepted as Lithoporella indica (Foslie) Adey, 1970
• Melobesia insidiosa (Solms-Laubach) Heydrich, 1897 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R.Mason, 1943
• Melobesia kerguelena Dickie, 1876 accepted as Lithothamnion kerguelenum (Dickie) Foslie, 1898
• Melobesia laminariae P.Crouan & H.Crouan, 1867 accepted as Titanoderma laminariae (P.Crouan & H.Crouan) Y.M.Chamberlain, 1991
• Melobesia lamourouxii Decaisne, 1842
• Melobesia lejolisii Rosanoff, 1866 accepted as Pneophyllum fragile Kützing, 1843
• Melobesia lejolisii f. limitata Foslie, 1905 accepted as Pneophyllum limitatum (Foslie) Y.M.Chamberlain, 1983
• Melobesia lemoinei Miranda, 1935 † (uncertain)
• Melobesia lenormandii J.E.Areschoug, 1852 accepted as Phymatolithon lenormandii (J.E.Areschoug) W.H.Adey, 1966
• Melobesia leptura Foslie, 1906
• Melobesia lichenoides (J.Ellis) Harvey, 1849 accepted as Mesophyllum lichenoides (J.Ellis) Me.Lemoine, 1928
• Melobesia lichenoides (Philippi) Endlicher, 1843 accepted as Lithophyllum byssoides (Lamarck) Foslie, 1900
• Melobesia limitata (Foslie) Rosenvinge, 1917 accepted as Pneophyllum limitatum (Foslie) Y.M.Chamberlain, 1983
• Melobesia macrocarpa Rosanoff, 1866 accepted as Titanoderma pustulatum (J.V.Lamouroux) Nägeli, 1858
• Melobesia mamillaris Duchassaing, 1850 (uncertain)
• Melobesia mamillaris Harvey, 1849 accepted as Neogoniolithon mamillare (Harvey) Setchell & L.R.Mason, 1943
• Melobesia marginata Setchell & Foslie, 1902
• Melobesia marginata f. sargassi Foslie, 1904 accepted as Hydrolithon sargassi (Foslie) Y.M.Chamberlain, 1994
• Melobesia masakii Baba & Yoshida, 1997 accepted as Melobesia tomitaroi Kloczcova, 1987
• Melobesia mauritiana (Foslie) Foslie, 1908 accepted as Pneophyllum mauritianum (Foslie) P.C.Silva, 1996
• Melobesia mediocris (Foslie) Setchell & L.R.Mason, 1943
• Melobesia mediterranea (Foslie) Me.Lemoine, 1924 accepted as Titanoderma mediterraneum (Foslie) Woelkerling, 1988
• Melobesia melobesioides (Foslie) Lemoine, 1927 accepted as Lithoporella melobesioides (Foslie) Foslie, 1909
• Melobesia membranacea (Esper) J.V.Lamouroux, 1812
• Melobesia microspora Rosenvinge, 1917 accepted as Pneophyllum fragile Kützing, 1843
• Melobesia minuta Schiffner, 1933 (uncertain)
• Melobesia minutula Foslie, 1904 accepted as Pneophyllum confervicola (Kützing) Y.M.Chamberlain, 1983
• Melobesia minutula f. lacunosa Foslie, 1905 accepted as Pneophyllum confervicola (Kützing) Y.M.Chamberlain, 1983
• Melobesia myriocarpa P.Crouan & H.Crouan, 1867 accepted as Pneophyllum myriocarpum (P.Crouan & H.Crouan) Y.M.Chamberlain, 1983
• Melobesia nodosa (Kjellman) Decaisne, 1842 accepted as Lithothamnion nodosum (Kützing) Woelkerling, 1985
• Melobesia notarisii Dufour, 1861 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R.Mason, 1943
• Melobesia novae-zelandiae Heydrich, 1897 accepted as Fosliella farinosa (J.V.Lamouroux) M.Howe, 1920 accepted as Hydrolithon farinosum (J.V.Lamouroux) Penrose & Y.M.Chamberlain, 1993
• Melobesia opalina Zanardini, 1843 (uncertain)
• Melobesia pacifica Heydrich, 1901 accepted as Mastophora pacifica (Heydrich) Foslie, 1903
• Melobesia pacifica Masaki, 1968 accepted as Melobesia tomitaroi Kloczcova, 1987
• Melobesia paschalis Me.Lemoine, 1924 accepted as Fosliella paschalis (M.Lemoine) Setchell & N.L.Gardner, 1930
• Melobesia patena J.D.Hooker & Harvey, 1849 accepted as Synarthrophyton patena (Hooker f. & Harvey) R.A.Townsend, 1979
• Melobesia phragmiticola Skolka, 1961 (uncertain)
• Melobesia plana Sonder, 1845 accepted as Metamastophora flabellata (Sonder) Setchell, 1943