1. Species Capulus bonneti Cossmann, 1910 †
2. Species Capulus bourdoti Cossmann, 1900 †
3. Species Capulus californicus Dall, 1900
4. Species Capulus circinatus Tate, 1893 †
5. Species Capulus compressus E. A. Smith, 1891
6. Species Capulus danieli (Crosse, 1858)
7. Species Capulus delicatus Lussi, 2022
8. Species Capulus deurganckensis Marquet & Landau, 2006 †
9. Species Capulus devexus (May, 1915)
10. Species Capulus dilatatus A. Adams, 1860
11. Species Capulus dilatatus (Deshayes, 1861) † (accepted > unreplaced junior homonym, junior secondary homonym of Capulus dilatatus A. Adams, 1860)
12. Species Capulus elegans Tapparone Canefri, 1877
13. Species Capulus excentricus Cossmann, 1896 †
14. Species Capulus gelatous S.-I Huang, 2022
15. Species Capulus huangi S.-I Huang & Y.-F. Huang, 2012
16. Species Capulus irregularis E. A. Smith, 1895
17. Species Capulus jasminus S.-I Huang, 2022
18. Species Capulus javanus Wanner & Hahn, 1935 †
19. Species Capulus junghuhni K. Martin, 1905 †
20. Species Capulus kawamurai T. Habe, 1992
21. Species Capulus ladyae Brunet, 1995 †
22. Species Capulus larochei Cossmann, 1913 †
23. Species Capulus ngai Thach, 2016
24. Species Capulus novaezelandiae Dell, 1978
25. Species Capulus onyxoides Cossmann, 1896 †
26. Species Capulus otohimeae (T. Habe, 1946)
27. Species Capulus pachycosmetus Cossmann, 1896 †
28. Species Capulus partimsinuosus S. V. Wood, 1848 †
29. Species Capulus patulus (Deshayes, 1861) †
30. Species Capulus pennatus (Lamarck, 1803) †
31. Species Capulus seranus P. J. Fischer, 1921 †
32. Species Capulus sericeus J. Q. Burch & R. L. Burch, 1961
33. Species Capulus simplex Locard, 1898
34. Species Capulus singularis (Deshayes, 1861) †
35. Species Capulus sinuosus (Brocchi, 1814) †
36. Species Capulus spondylicola T. Habe, 1967
37. Species Capulus sulcatus Wilckens, 1910 †
38. Species Capulus uncinatus (F. W. Hutton, 1873) †
39. Species Capulus ungaricoides (A. d'Orbigny, 1841)
40. Species Capulus ungaricus (Linnaeus, 1758)
41. Subgenus Capulus (Capulus) Montfort, 1810 accepted as Capulus Montfort, 1810
    1. Species Capulus (Capulus) seranus P. J. Fischer, 1921 † accepted as Capulus seranus P. J. Fischer, 1921 † (unaccepted > superseded combination)
42. Subgenus Capulus (Cyclothyca) Stearns, 1890 accepted as Cyclothyca Stearns, 1890 (original rank)
    1. Species Capulus (Cyclothyca) corrugatus Stearns, 1890 accepted as Cyclothyca corrugata (Stearns, 1890) (basionym)
43. Subgenus Capulus (Hyalorisia) Dall, 1889 accepted as Hyalorisia Dall, 1889 (original rank)
    1. Species Capulus (Hyalorisia) galea Dall, 1889 accepted as Hyalorisia galea (Dall, 1889) (basionym)
    2. Species Capulus (Hyalorisia) nettlesi J. E. Robinson, 1983 † accepted as Hyalorisia nettlesi (J. E. Robinson, 1983) † (basionym)
    3. Species Capulus (Hyalorisia) tosaensis Otsuka, 1939 accepted as Hyalorisia tosaensis (Otsuka, 1939)
44. Subgenus Capulus (Krebsia) Mörch, 1877 accepted as Capulus Montfort, 1810
    1. Species Capulus (Krebsia) incurvatus Weisbord, 1962 accepted as Hipponix incurvus (Gmelin, 1791) (unjustified emendation)
45. Subgenus Capulus (Thyca) H. Adams & A. Adams, 1854 accepted as Thyca H. Adams & A. Adams, 1854
    1. Species Capulus (Thyca) elegans Tapparone Canefri, 1877 accepted as Capulus elegans Tapparone Canefri, 1877
46. Species Capulus badius Dunker, 1882 accepted as Trichamathina badia (Dunker, 1882) (unaccepted > superseded combination)
47. Species Capulus banksi Cotton, 1939 accepted as Malluvium devotum (Hedley, 1904) (junior subjective synonym)
48. Species Capulus bicarinatus (Pease, 1861) accepted as Trichamathina bicarinata (Pease, 1861) (unaccepted > superseded combination)
49. Species Capulus buccinulum A. N. Golikov, 1967 accepted as Trichamathina buccinula (A. N. Golikov, 1967) (unaccepted > superseded combination)
50. Species Capulus calcareus Suter, 1909 accepted as Malluvium calcareum (Suter, 1909) (superseded combination)
51. Species Capulus camaranensis Sturany, 1903 accepted as Malluvium lissum (E. A. Smith, 1894)
52. Species Capulus canadensis (Whiteaves, 1895) † accepted as Guelphinacella canadense (Whiteaves, 1884) † (unaccepted > superseded combination)
53. Species Capulus chilensis Dall, 1908 accepted as Capulus ungaricoides (A. d'Orbigny, 1841)
54. Species Capulus complectus Aldrich, 1886 † accepted as Leptonotis expansus (Whitfield, 1865) † (unaccepted > junior subjective synonym)
55. Species Capulus consobrinus A. d'Orbigny, 1850 † accepted as Hipponix consobrinus (A. d'Orbigny, 1850) † (original combination)
56. Species Capulus corrugatus Millet, 1865 † accepted as Capulus partimsinuosus S. V. Wood, 1848 †
57. Species Capulus depressus A. Adams, 1861 accepted as Piliscus commodus (Middendorff, 1851)
58. Species Capulus devotus Hedley, 1904 accepted as Malluvium devotum (Hedley, 1904) (superseded combination)
59. Species Capulus fragilis E. A. Smith, 1904 accepted as Hyalorisia fragilis (E. A. Smith, 1904) (original combination)
60. Species Capulus galea Dall, 1889 accepted as Hyalorisia galea (Dall, 1889) (original combination)
61. Species Capulus galeus [sic] accepted as Capulus galea Dall, 1889 accepted as Hyalorisia galea (Dall, 1889) (incorrect subsequent spelling)
62. Species Capulus haworthi Beede, 1907 † accepted as Lepetopsis haworthi (Beede, 1907) † (basionym)
63. Species Capulus hungaricus Jeffreys, 1865 accepted as Capulus ungaricus (Linnaeus, 1758) (unaccepted > unjustified emendation, of Capulus ungaricus (Linnaeus, 1758))
64. Species Capulus incertus Bell, 1870 † accepted as Capulus partimsinuosus S. V. Wood, 1848 †
65. Species Capulus incurvus (Gmelin, 1791) accepted as Hipponix incurvus (Gmelin, 1791)
66. Species Capulus intortus (Lamarck, 1822) accepted as Hipponix incurvus (Gmelin, 1791)
67. Species Capulus japonicus A. Adams, 1861 accepted as Trichamathina japonica (A. Adams, 1861) (unaccepted > superseded combination)
68. Species Capulus latus (Keyes, 1888) † accepted as Platyceras latum Keyes, 1888 † (unaccepted > superseded combination)
69. Species Capulus liberatus Pease, 1868 accepted as Krebsia liberata (Pease, 1868) accepted as Hipponix liberatus (Pease, 1868) (superseded combination)
70. Species Capulus lissus E. A. Smith, 1894 accepted as Malluvium lissum (E. A. Smith, 1894) (original combination)
71. Species Capulus militaris (Linnaeus, 1771) accepted as Capulus ungaricus (Linnaeus, 1758)
72. Species Capulus nasutum (S. A. Miller, 1891) † accepted as Platyceras nasutum S. A. Miller, 1891 † (unaccepted > superseded combination)
73. Species Capulus nobilis (A. Adams, 1867) accepted as Trichamathina nobilis (A. Adams, 1867) (unaccepted > superseded combination)
74. Species Capulus nutatus Hedley, 1908 accepted as Williamia radiata (Pease, 1861) (junior subjective synonym)
75. Species Capulus ornatissimus A. d'Orbigny, 1850 † accepted as Hipponix ornatissimus (A. d'Orbigny, 1850) † (original combination)
76. Species Capulus parmophoroides Cossmann, 1885 † accepted as Plesiothyreus parmophoroides (Cossmann, 1885) † (original combination)
77. Species Capulus parvus Swallow, 1858 † accepted as Orthonychia parva (Swallow, 1858) † (unaccepted > superseded combination)
78. Species Capulus permocarbonicus Stuckenberg, 1874 † accepted as Stuckenbergispira permocarbonicus (Stuckenberg, 1874) † (basionym)
79. Species Capulus planus Dockery, 1984 † accepted as Leptonotis planus (Dockery, 1984) † (original combination)
80. Species Capulus pulcherrimus Jousseaume, 1894 accepted as Trichamathina badia (Dunker, 1882) (unaccepted > junior subjective synonym)
81. Species Capulus pustulosus Münster, 1841 † accepted as Platychilina pustulosa (Münster, 1841) † (unaccepted > superseded combination)
82. Species Capulus radiatus M. Sars, 1851 accepted as Piliscus commodus (Middendorff, 1851) (a junior synonym)
83. Species Capulus sagittifer A. Gould, 1852 accepted as Zacalantica sagittifer (A. Gould, 1852) (original combination)
84. Species Capulus shreevei Conrad, 1869 accepted as Cyrtopleura costata (Linnaeus, 1758)
85. Species Capulus subcompressus Pelseneer, 1903 accepted as Cryocapulus subcompressus (Pelseneer, 1903) (original combination)
86. Species Capulus sycophanta Garrard, 1961 accepted as Capulus danieli (Crosse, 1858) (unaccepted > junior subjective synonym)
87. Species Capulus tosaensis Otsuka, 1939 accepted as Hyalorisia tosaensis (Otsuka, 1939) (original combination)
88. Species Capulus violaceus Angas, 1867 accepted as Trichamathina violacea (Angas, 1867) (unaccepted > superseded combination)
89. Species Capulus barrandei M. Hörnes, 1856 † (uncertain > taxon inquirendum)
90. Species Capulus carinifer J. Müller, 1851 † (uncertain > unassessed)
91. Species Capulus efluens Guppy, 1911 † (uncertain > taxon inquirendum)
92. Species Capulus fragilis Meek & Hayden, 1856 † (uncertain > taxon inquirendum)
93. Species Capulus inornatus Gabb, 1873 † (uncertain > unassessed)
94. Species Capulus militaris J. Müller, 1851 † (uncertain > unassessed)
95. Species Capulus papyraceus R. A. Philippi, 1887 † (uncertain > unassessed)
96. Species Capulus troscheli J. Müller, 1851 † (uncertain > unassessed)

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