1. Species Fossarus ambiguus (Linnaeus, 1758)
2. Species Fossarus angiostoma (C. B. Adams, 1852)
3. Species Fossarus angulatus P. P. Carpenter, 1857
4. Species Fossarus beccarii (Tapparone Canefri, 1875)
5. Species Fossarus brumalis Hedley, 1907
6. Species Fossarus capensis Pilsbry, 1901
7. Species Fossarus cereus R. B. Watson, 1880
8. Species Fossarus cumingii A. Adams, 1855
9. Species Fossarus dentifer E. A. Smith, 1890
10. Species Fossarus fischeri Mörch, 1877
11. Species Fossarus garrettii Pease, 1868
12. Species Fossarus guayaquilensis Bartsch, 1928
13. Species Fossarus laeviusculus E. A. Smith, 1890
14. Species Fossarus lamellosus (Montrouzier, 1861)
15. Species Fossarus lucanus Dall, 1919
16. Species Fossarus lui S.-I Huang, 2012
17. Species Fossarus mediocris de Folin, 1867
18. Species Fossarus megasoma (C. B. Adams, 1852)
19. Species Fossarus multicostatus Pease, 1861
20. Species Fossarus orbignyi P. Fischer, 1864
21. Species Fossarus purus P. P. Carpenter, 1864
22. Species Fossarus refractus Tate, 1898 †
23. Species Fossarus stoliczkanus G. Nevill & H. Nevill, 1871
24. Species Fossarus translucens Barnard, 1969
25. Species Fossarus trochlearis A. Adams, 1855
26. Species Fossarus tuberosus P. P. Carpenter, 1857
27. Subgenus Fossarus (Couthouyia) A. Adams, 1860 accepted as Macromphalus S. V. Wood, 1842 (junior synonym)
    1. Species Fossarus (Couthouyia) cancellarius Melvill, 1918 accepted as Fossarus cancellarius Melvill, 1918 (basionym)
    2. Species Fossarus (Couthouyia) dentifer E. A. Smith, 1890 accepted as Fossarus dentifer E. A. Smith, 1890 (basionym)
    3. Species Fossarus (Couthouyia) laeviusculus E. A. Smith, 1890 accepted as Fossarus laeviusculus E. A. Smith, 1890 (basionym)
    4. Species Fossarus (Couthouyia) thelacme Melvill, 1904 accepted as Macromphalus thelacme (Melvill, 1904) (unaccepted > superseded combination)
    5. Species Fossarus (Couthouyia) eudmetus Melvill, 1906 (uncertain)
    6. Species Fossarus (Couthouyia) quinquecarinalis Melvill, 1904 (uncertain > unassessed, use in recent literature not established by editor)
    7. Species Fossarus (Couthouyia) unicarinalis Melvill & Standen, 1903 (uncertain > unassessed, use in recent literature not established by editor)
28. Subgenus Fossarus (Gottoina) A. Adams, 1863 accepted as Conradia A. Adams, 1860 (unaccepted > junior subjective synonym)
    1. Species Fossarus (Gottoina) bella Dall, 1889 accepted as Haplocochlias bellus (Dall, 1889) (basionym)
    2. Species Fossarus (Gottoina) compacta Dall, 1889 accepted as Haplocochlias compactus (Dall, 1889) (original combination)
    3. Species Fossarus (Gottoina) mundulus Guppy, 1896 † (uncertain > unassessed)
29. Subgenus Fossarus (Isapis) H. Adams & A. Adams, 1854 accepted as Iselica Dall, 1918 (invalid; name preoccupied)
    1. Species Fossarus (Isapis) anomala (C. B. Adams, 1850) † accepted as Iselica anomala (C. B. Adams, 1850) accepted as Iselica globosa (H. C. Lea, 1843)
    2. Species Fossarus (Isapis) maculosa P. P. Carpenter, 1857 accepted as Iselica maculosa (P. P. Carpenter, 1857)
    3. Species Fossarus (Isapis) urbannaensis Mansfield, 1929 † (uncertain > unassessed)
30. Subgenus Fossarus (Maravignia) Aradas & Maggiore, 1844 accepted as Fossarus R. A. Philippi, 1841
    1. Species Fossarus (Maravignia) proambiguus O. Boettger, 1902 † (uncertain > unassessed)
    2. Species Fossarus (Maravignia) subtricostatus O. Boettger, 1907 † (uncertain > unassessed)
31. Subgenus Fossarus (Phasianema) S. V. Wood, 1842 accepted as Phasianema S. V. Wood, 1842 (unaccepted > superseded rank)
    1. Species Fossarus (Phasianema) microstomus O. Boettger, 1902 † (uncertain > unassessed)
32. Species Fossarus abjectus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
33. Species Fossarus adansoni R. A. Philippi, 1841 accepted as Fossarus ambiguus (Linnaeus, 1758)
34. Species Fossarus angiolus Dall, 1919 accepted as Parviturbo acuticostatus (P. P. Carpenter, 1864) (unaccepted > junior subjective synonym)
35. Species Fossarus aptus Melvill, 1912 accepted as Fossarus ambiguus (Linnaeus, 1758)
36. Species Fossarus atratus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
37. Species Fossarus aupouria A. W. B. Powell, 1937 accepted as Tornus aupouria (A. W. B. Powell, 1937) (superseded combination)
38. Species Fossarus bellus Dall, 1889 accepted as Haplocochlias bellus (Dall, 1889)
39. Species Fossarus bulimoides Tenison Woods, 1877 accepted as Leucotina casta (A. Adams, 1853) (unaccepted > junior subjective synonym)
40. Species Fossarus clathratus R. A. Philippi, 1844 accepted as Carinorbis clathrata (R. A. Philippi, 1844) (unaccepted > superseded combination)
41. Species Fossarus comptus Woodring, 1928 † accepted as Parviturbo comptus (Woodring, 1928) (original combination)
42. Species Fossarus conicus Odhner, 1924 accepted as Nilsia cuvieriana (Suter, 1908) (junior subjective synonym)
43. Species Fossarus depressus G. Seguenza, 1876 accepted as Megalomphalus depressus (G. Seguenza, 1876)
44. Species Fossarus depressus G. Seguenza, 1874 accepted as Megalomphalus depressus (G. Seguenza, 1876) (unaccepted > nomen nudum)
45. Species Fossarus disciformis Granata Grillo, 1877 accepted as Megalomphalus depressus (G. Seguenza, 1876) (unaccepted > junior subjective synonym)
46. Species Fossarus eutorniscus Melvill, 1918 accepted as Conradia eutornisca (Melvill, 1918) (unaccepted > superseded combination)
47. Species Fossarus excavatus Gaglini, 1987 accepted as Rugulina monterosatoi (van Aartsen & Bogi, 1987) (synonym)
48. Species Fossarus excavatus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
49. Species Fossarus fischeri de Laubrière, 1881 † accepted as Macromphalus fischeri (de Laubrière, 1881) † (unaccepted > superseded combination)
50. Species Fossarus fossar (de Gregorio, 1889) accepted as Fossarus ambiguus (Linnaeus, 1758) (unaccepted > junior subjective synonym)
51. Species Fossarus foveatus (C. B. Adams, 1852) accepted as Echinolittorina atrata (C. B. Adams, 1852)
52. Species Fossarus globulosus W. H. Turton, 1932 accepted as Couthouyia incerta (W. H. Turton, 1932) accepted as Macromphalus incertus (W. H. Turton, 1932)
53. Species Fossarus granulum Brugnone, 1873 accepted as Pseudorbis granulum (Brugnone, 1873) (original combination)
54. Species Fossarus hyalinus Odhner, 1924 accepted as Scrupus hyalinus (Odhner, 1924) (superseded combination)
55. Species Fossarus incertus W. H. Turton, 1932 accepted as Macromphalus incertus (W. H. Turton, 1932) (original combination)
56. Species Fossarus indicus (E. A. Smith, 1894) accepted as Macromphalus indicus (E. A. Smith, 1894)
57. Species Fossarus insignis G. Nevill & H. Nevill, 1871 accepted as Macromphalus insignis (G. Nevill & H. Nevill, 1871)
58. Species Fossarus iwateanus Nomura & Hatai, 1935 accepted as Phasianema lirata (A. Adams, 1860)
59. Species Fossarus japonicus A. Adams, 1861 accepted as Macromphalus tornatilis (A. Gould, 1859)
60. Species Fossarus lanoei Baudon, 1858 accepted as Fossarus ambiguus (Linnaeus, 1758) (synonym)
61. Species Fossarus macmurdensis (Hedley, 1911) accepted as Trilirata macmurdensis (Hedley, 1911)
62. Species Fossarus maoria A. W. B. Powell, 1937 accepted as Tornus maoria (A. W. B. Powell, 1937) (superseded combination)
63. Species Fossarus monterosati Granata Grillo, 1877 accepted as Tjaernoeia exquisita (Jeffreys, 1883)
64. Species Fossarus ovatus Odhner, 1924 accepted as Zeradina ovata (Odhner, 1924) (superseded combination)
65. Species Fossarus parcipictus P. P. Carpenter, 1864 accepted as Echinolittorina parcipicta (P. P. Carpenter, 1864)
66. Species Fossarus petitianus Tiberi, 1868 accepted as Megalomphalus petitianus (Tiberi, 1868) (original combination)
67. Species Fossarus porcatus (R. A. Philippi, 1846) accepted as Echinolittorina porcata (R. A. Philippi, 1846) (unaccepted > superseded combination)
68. Species Fossarus productus Odhner, 1924 accepted as Zeradina producta (Odhner, 1924) (superseded combination)
69. Species Fossarus saxicola (C. B. Adams, 1852) accepted as Elachisina saxicola (C. B. Adams, 1852)
70. Species Fossarus sydneyensis Hedley, 1900 accepted as Anafossarus sydneyensis (Hedley, 1900) (superseded combination)
71. Species Fossarus tornatilis A. Gould, 1859 accepted as Macromphalus tornatilis (A. Gould, 1859) (superseded combination)
72. Species Fossarus yamamotoi Habe, 1978 accepted as Macromphalus yamamotoi (Habe, 1978) (unaccepted > superseded combination)
73. Species Fossarus bicarinatus A. Adams, 1855 (uncertain > taxon inquirendum)
74. Species Fossarus caledonicus Crosse, 1874 (uncertain > taxon inquirendum)
75. Species Fossarus cancellarius Melvill, 1918 (uncertain > taxon inquirendum, not reported in recent literature; belongs probably to Vanikoridae)
76. Species Fossarus curiosus W. H. Turton, 1932 (uncertain > taxon inquirendum)
77. Species Fossarus ecphora Pilsbry, 1921 (uncertain > taxon inquirendum)
78. Species Fossarus elegans A. E. Verrill & S. Smith, 1882 (uncertain > taxon inquirendum, not reported in recent literature, probably a vetigastropod in genus Haplocochlias)
79. Species Fossarus erythraeensis E. Lamy, 1938 (uncertain > taxon inquirendum)
80. Species Fossarus fenestratus Deshayes, 1857 (uncertain > unassessed)
81. Species Fossarus oblongus G. B. Sowerby III, 1905 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)
82. Species Fossarus pilula Cossmann, 1899 † (uncertain > unassessed)

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