• Fossarus R. A. Philippi, 1841
• Fossarus (Couthouyia) A. Adams, 1860 accepted as Macromphalus S. V. Wood, 1842
• Fossarus (Couthouyia) cancellarius Melvill, 1918 accepted as Fossarus cancellarius Melvill, 1918
• Fossarus (Couthouyia) dentifer E. A. Smith, 1890 accepted as Fossarus dentifer E. A. Smith, 1890
• Fossarus (Couthouyia) eudmetus Melvill, 1906 (uncertain)
• Fossarus (Couthouyia) laeviusculus E. A. Smith, 1890 accepted as Fossarus laeviusculus E. A. Smith, 1890
• Fossarus (Couthouyia) quinquecarinalis Melvill, 1904 (uncertain > unassessed)
• Fossarus (Couthouyia) thelacme Melvill, 1904 accepted as Macromphalus thelacme (Melvill, 1904)
• Fossarus (Couthouyia) unicarinalis Melvill & Standen, 1903 (uncertain > unassessed)
• Fossarus (Gottoina) A. Adams, 1863 accepted as Conradia A. Adams, 1860
• Fossarus (Gottoina) bella Dall, 1889 accepted as Haplocochlias bellus (Dall, 1889)
• Fossarus (Gottoina) compacta Dall, 1889 accepted as Haplocochlias compactus (Dall, 1889)
• Fossarus (Gottoina) mundulus Guppy, 1896 † (uncertain > unassessed)
• Fossarus (Isapis) H. Adams & A. Adams, 1854 accepted as Iselica Dall, 1918
• Fossarus (Isapis) anomala (C. B. Adams, 1850) † accepted as Iselica anomala (C. B. Adams, 1850) accepted as Iselica globosa (H. C. Lea, 1843)
• Fossarus (Isapis) anomala floridana Mansfield, 1930 † accepted as Iselica globosa (H. C. Lea, 1843)
• Fossarus (Isapis) maculosa P. P. Carpenter, 1857 accepted as Iselica maculosa (P. P. Carpenter, 1857)
• Fossarus (Isapis) urbannaensis Mansfield, 1929 † (uncertain > unassessed)
• Fossarus (Maravignia) Aradas & Maggiore, 1844 accepted as Fossarus R. A. Philippi, 1841
• Fossarus (Maravignia) proambiguus O. Boettger, 1902 † (uncertain > unassessed)
• Fossarus (Maravignia) subtricostatus O. Boettger, 1907 † (uncertain > unassessed)
• Fossarus (Phasianema) S. V. Wood, 1842 accepted as Phasianema S. V. Wood, 1842
• Fossarus (Phasianema) microstomus O. Boettger, 1902 † accepted as Clathrella microstoma (O. Boettger, 1902) †
• Fossarus abjectus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
• Fossarus adansoni R. A. Philippi, 1841 accepted as Fossarus ambiguus (Linnaeus, 1758)
• Fossarus ambiguus (Linnaeus, 1758)
• Fossarus angiolus Dall, 1919 accepted as Parviturbo acuticostatus (P. P. Carpenter, 1864)
• Fossarus angiostoma (C. B. Adams, 1852)
• Fossarus angulatus P. P. Carpenter, 1857
• Fossarus aptus Melvill, 1912 accepted as Fossarus ambiguus (Linnaeus, 1758)
• Fossarus atratus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
• Fossarus aupouria A. W. B. Powell, 1937 accepted as Tornus aupouria (A. W. B. Powell, 1937)
• Fossarus beccarii (Tapparone Canefri, 1875)
• Fossarus bellus Dall, 1889 accepted as Haplocochlias bellus (Dall, 1889)
• Fossarus bicarinatus A. Adams, 1855 (uncertain > taxon inquirendum)
• Fossarus brumalis Hedley, 1907
• Fossarus bulimoides Tenison Woods, 1877 accepted as Leucotina casta (A. Adams, 1853)
• Fossarus caledonicus Crosse, 1874 (uncertain > taxon inquirendum)
• Fossarus cancellarius Melvill, 1918 (uncertain > taxon inquirendum)
• Fossarus capensis Pilsbry, 1901
• Fossarus cereus R. B. Watson, 1880
• Fossarus clathratus R. A. Philippi, 1844 accepted as Carinorbis clathrata (R. A. Philippi, 1844)
• Fossarus comptus Woodring, 1928 † accepted as Parviturbo comptus (Woodring, 1928)
• Fossarus concentricus Laube, 1870 † accepted as Palaeonarica concentrica (Münster, 1841) †
• Fossarus conicus Odhner, 1924 accepted as Nilsia cuvieriana (Suter, 1908)
• Fossarus cumingii A. Adams, 1855
• Fossarus curiosus W. H. Turton, 1932 (uncertain > taxon inquirendum)
• Fossarus dentifer E. A. Smith, 1890
• Fossarus depressus G. Seguenza, 1874 accepted as Megalomphalus depressus (G. Seguenza, 1876) accepted as Megalomphalus disciformis (Granata Grillo, 1877) accepted as Megalomphalus azoneus (Brusina, 1865)
• Fossarus depressus G. Seguenza, 1876 accepted as Megalomphalus disciformis (Granata Grillo, 1877) accepted as Megalomphalus azoneus (Brusina, 1865)
• Fossarus disciformis Granata Grillo, 1877 accepted as Megalomphalus azoneus (Brusina, 1865)
• Fossarus disciformis var. disjuncta Granata Grillo, 1877 accepted as Megalomphalus disciformis (Granata Grillo, 1877) accepted as Megalomphalus azoneus (Brusina, 1865)
• Fossarus ecphora Pilsbry, 1921 (uncertain > taxon inquirendum)
• Fossarus elegans A. E. Verrill & S. Smith, 1882 (uncertain > taxon inquirendum)
• Fossarus erythraeensis E. Lamy, 1938 (uncertain > taxon inquirendum)
• Fossarus eutorniscus Melvill, 1918 accepted as Conradia eutornisca (Melvill, 1918)
• Fossarus excavatus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
• Fossarus excavatus Gaglini, 1987 accepted as Rugulina monterosatoi (van Aartsen & Bogi, 1987)
• Fossarus fenestratus Deshayes, 1857 (uncertain > unassessed)
• Fossarus fischeri de Laubrière, 1881 † accepted as Macromphalus fischeri (de Laubrière, 1881) †
• Fossarus fischeri Mörch, 1877
• Fossarus fossar (de Gregorio, 1889) accepted as Fossarus ambiguus (Linnaeus, 1758)
• Fossarus foveatus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
• Fossarus garrettii Pease, 1868
• Fossarus globulosus W. H. Turton, 1932 accepted as Couthouyia incerta (W. H. Turton, 1932) accepted as Macromphalus incertus (W. H. Turton, 1932)
• Fossarus granulum Brugnone, 1873 accepted as Pseudorbis granulum (Brugnone, 1873)
• Fossarus guayaquilensis Bartsch, 1928
• Fossarus hyalinus Odhner, 1924 accepted as Scrupus hyalinus (Odhner, 1924)
• Fossarus incertus W. H. Turton, 1932 accepted as Macromphalus incertus (W. H. Turton, 1932)
• Fossarus incertus var. similis W. H. Turton, 1932 accepted as Couthouyia incerta (W. H. Turton, 1932) accepted as Macromphalus incertus (W. H. Turton, 1932)
• Fossarus indicus (E. A. Smith, 1894) accepted as Macromphalus indicus (E. A. Smith, 1894)
• Fossarus insignis G. Nevill & H. Nevill, 1871 accepted as Macromphalus insignis (G. Nevill & H. Nevill, 1871)
• Fossarus iwateanus Nomura & Hatai, 1935 accepted as Phasianema lirata (A. Adams, 1860)
• Fossarus japonicus A. Adams, 1861 accepted as Macromphalus tornatilis (A. Gould, 1859)
• Fossarus laeviusculus E. A. Smith, 1890
• Fossarus lamellosus (Montrouzier, 1861)
• Fossarus lanoei Baudon, 1858 accepted as Fossarus ambiguus (Linnaeus, 1758)
• Fossarus lucanus Dall, 1919
• Fossarus lui S.-I Huang, 2012
• Fossarus macmurdensis (Hedley, 1911) accepted as Trilirata macmurdensis (Hedley, 1911)
• Fossarus maoria A. W. B. Powell, 1937 accepted as Tornus maoria (A. W. B. Powell, 1937)
• Fossarus mediocris de Folin, 1867
• Fossarus megasoma (C. B. Adams, 1852)
• Fossarus monterosati Granata Grillo, 1877 accepted as Tjaernoeia exquisita (Jeffreys, 1883)
• Fossarus multicostatus Pease, 1861
• Fossarus oblongus G. B. Sowerby III, 1905 (uncertain > taxon inquirendum)
• Fossarus orbignyi P. Fischer, 1864
• Fossarus orbignyi var. tridentata Nowell-Usticke, 1959 accepted as Fossarus orbignyi P. Fischer, 1864
• Fossarus ovatus Odhner, 1924 accepted as Zeradina ovata (Odhner, 1924)
• Fossarus parcipictus P. P. Carpenter, 1864 accepted as Echinolittorina parcipicta (P. P. Carpenter, 1864)
• Fossarus petitianus Tiberi, 1868 accepted as Megalomphalus petitianus (Tiberi, 1868)
• Fossarus pilula Cossmann, 1899 † (uncertain > unassessed)
• Fossarus porcatus (R. A. Philippi, 1846) accepted as Echinolittorina porcata (R. A. Philippi, 1846)
• Fossarus productus Odhner, 1924 accepted as Zeradina producta (Odhner, 1924)
• Fossarus purus P. P. Carpenter, 1864
• Fossarus pyrulaeformis Klipstein, 1843 † accepted as Palaeonarica pyrulaeformis (Klipstein, 1843) †
• Fossarus refractus Tate, 1898 †
• Fossarus saxicola (C. B. Adams, 1852) accepted as Elachisina saxicola (C. B. Adams, 1852)
• Fossarus stoliczkanus G. Nevill & H. Nevill, 1871
• Fossarus sydneyensis Hedley, 1900 accepted as Anafossarus sydneyensis (Hedley, 1900)