1. Species Lacuna amaura Cossmann, 1888 †
2. Species Lacuna carinifera A. Adams, 1853
3. Species Lacuna cleicecabrale Barros, 1994
4. Species Lacuna crassior (Montagu, 1803)
5. Species Lacuna decorata A. Adams, 1861
6. Species Lacuna dialyta Cossmann, 1896 †
7. Species Lacuna dutemplii Deshayes, 1861 †
8. Species Lacuna globulosa Deshayes, 1861 †
9. Species Lacuna grandis Cossmann, 1902 †
10. Species Lacuna houdasi Cossmann, 1913 †
11. Species Lacuna latifasciata A. Adams, 1863
12. Species Lacuna lepidula A. Adams, 1863
13. Species Lacuna lukinii (A. N. Golikov & Gulbin, 1978)
14. Species Lacuna macrostoma Deshayes, 1861 †
15. Species Lacuna marmorata Dall, 1919
16. Species Lacuna minor (Dall, 1919)
17. Species Lacuna orientalis (A. N. Golikov & Kussakin, 1985)
18. Species Lacuna pallidula (da Costa, 1778)
19. Species Lacuna parva (da Costa, 1778)
20. Species Lacuna porrecta P. P. Carpenter, 1864
21. Species Lacuna pulchella Deshayes, 1861 †
22. Species Lacuna pumilio E. A. Smith, 1890
23. Species Lacuna reflexa Dall, 1884
24. Species Lacuna sigaretina Deshayes, 1861 †
25. Species Lacuna smithii Pilsbry, 1895
26. Species Lacuna succinea S. S. Berry, 1953
27. Species Lacuna sulcifera Cossmann, 1896 †
28. Species Lacuna turgida Deshayes, 1861 †
29. Species Lacuna turneri (Dall, 1886)
30. Species Lacuna turrita A. Adams, 1861
31. Species Lacuna uchidai (Habe, 1953)
32. Species Lacuna unifasciata P. P. Carpenter, 1857
33. Species Lacuna vaginata (Dall, 1918)
34. Species Lacuna variegata P. P. Carpenter, 1864
35. Species Lacuna vincta (Montagu, 1803)
36. Subgenus Lacuna (Cirsope) Cossmann, 1888 † accepted as Cirsope Cossmann, 1888 † (original rank)
37. Subgenus Lacuna (Epheria) Leach, 1847 accepted as Lacuna W. Turton, 1827
    1. Species Lacuna (Epheria) canalis (Montagu, 1803) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
    2. Species Lacuna (Epheria) decorata A. Adams, 1861 accepted as Lacuna decorata A. Adams, 1861 (basionym)
    3. Species Lacuna (Epheria) divaricata (O. Fabricius, 1780) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
    4. Species Lacuna (Epheria) fasciata (J. Adams, 1800) accepted as Lacuna parva (da Costa, 1778)
    5. Species Lacuna (Epheria) inflata (A. Adams, 1861) accepted as Lacuna decorata A. Adams, 1861
    6. Species Lacuna (Epheria) lepidula A. Adams, 1863 accepted as Lacuna lepidula A. Adams, 1863 (basionym)
    7. Species Lacuna (Epheria) porrecta P. P. Carpenter, 1864 accepted as Lacuna porrecta P. P. Carpenter, 1864 (unaccepted > superseded combination)
    8. Species Lacuna (Epheria) vincta (Montagu, 1803) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > superseded combination)
    9. Species Lacuna (Epheria) cancavennensis Martel, 1914 (uncertain > taxon inquirendum)
38. Subgenus Lacuna (Haloconcha) Dall, 1886 accepted as Lacuna W. Turton, 1827 (a junior synonym)
39. Subgenus Lacuna (Hela) Jeffreys, 1870 accepted as Benthonella Dall, 1889 (invalid: homonym)
    1. Species Lacuna (Hela) margaritifera R. B. Watson, 1880 accepted as Benthonella margaritifera (R. B. Watson, 1886) (superseded combination)
40. Subgenus Lacuna (Lacunella) Dall, 1884 accepted as Lacuna W. Turton, 1827 (invalid: junior homonym of Lacunella Deshayes, 1861)
    1. Species Lacuna (Lacunella) reflexa Dall, 1884 accepted as Lacuna reflexa Dall, 1884 (original combination)
    2. Species Lacuna (Lacunella) refleza Dall, 1884 accepted as Lacuna reflexa Dall, 1884 (original misspelling)
41. Subgenus Lacuna (Medoria) Leach, 1847 accepted as Lacuna W. Turton, 1827
    1. Species Lacuna (Medoria) turrita (A. Adams, 1861) accepted as Lacuna turrita A. Adams, 1861 (unaccepted > superseded combination)
42. Subgenus Lacuna (Medoriopsis) Cossmann, 1888 † accepted as Medoriopsis Cossmann, 1888 † (original rank)
43. Subgenus Lacuna (Pseudocirsope) O. Boettger, 1907 † accepted as Pseudocirsope O. Boettger, 1907 †
44. Species Lacuna abyssicola Melvill & Standen, 1912 accepted as Moelleriopsis poppei Engl, 2012 (Invalid: junior secondary homonym of Moelleriopsis abyssicola Bush, 1897; Moelleriopsis poppei is a replacement name)
45. Species Lacuna abyssorum Locard, 1896 accepted as Benthonella tenella (Jeffreys, 1869) (synonym)
46. Species Lacuna actaeonoides Cossmann, 1888 † accepted as Medoriopsis actaeonoides (Cossmann, 1888) † (unaccepted > superseded combination)
47. Species Lacuna albella Lovén, 1846 accepted as Lacuna vincta (Montagu, 1803) (synonym)
48. Species Lacuna anomala Cossmann, 1882 † accepted as Pseudocirsope anomala (Cossmann, 1882) † (unaccepted > superseded combination)
49. Species Lacuna antarctica E. von Martens, 1885 accepted as Laevilacunaria antarctica (E. von Martens, 1885) (original combination)
50. Species Lacuna aratulus Cossmann, 1888 † accepted as Orthochilus aratulus (Cossmann, 1888) † (unaccepted > superseded combination)
51. Species Lacuna arctica R. A. Philippi, 1853 accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
52. Species Lacuna azonata Locard, 1886 accepted as Megalomphalus azoneus (Brusina, 1865) (unaccepted > unjustified emendation, of Stomatia azonea Brusina, 1865)
53. Species Lacuna bicincta Gougerot & Le Renard, 1982 † accepted as Pseudocirsope bicincta (Gougerot & Le Renard, 1982) † (unaccepted > superseded combination)
54. Species Lacuna billiardi Cossmann, 1893 † accepted as Medoriopsis billiardi (Cossmann, 1893) † (unaccepted > superseded combination)
55. Species Lacuna bonneti Cossmann, 1913 † accepted as Lacunella bonneti (Cossmann, 1913) † (unaccepted > superseded combination)
56. Species Lacuna borealis R. A. Philippi, 1853 accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
57. Species Lacuna bourgeoisi Tournouër, 1874 † accepted as Pseudocirsope delphinuloides (Millet, 1865) †
58. Species Lacuna bourguignati Rochebrune, 1882 accepted as Fossarus ambiguus (Linnaeus, 1758)
59. Species Lacuna bulimoides Deshayes, 1861 † accepted as Lacunella bulimoides (Deshayes, 1861) † (unaccepted > superseded combination)
60. Species Lacuna bulimopsis Deshayes, 1861 † accepted as Medoriopsis bulimopsis (Deshayes, 1861) † (unaccepted > superseded combination)
61. Species Lacuna canalis (Montagu, 1803) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > superseded combination)
62. Species Lacuna carinata A. Gould, 1848 accepted as Lacuna vincta (Montagu, 1803) (junior subjective synonym)
63. Species Lacuna circumvallata Cossmann, 1888 † accepted as Pseudocirsope circumvallata (Cossmann, 1888) † (unaccepted > superseded combination)
64. Species Lacuna cliona de Raincourt & Munier-Chalmas, 1863 † accepted as Cymenorytis cliona (de Raincourt & Munier-Chalmas, 1863) † (unaccepted > superseded combination)
65. Species Lacuna cochlearella Cossmann, 1888 † accepted as Medoriopsis cochlearella (Cossmann, 1888) † (unaccepted > superseded combination)
66. Species Lacuna compressa Cossmann, 1888 † accepted as Lacunella compressa (Cossmann, 1888) † (unaccepted > superseded combination)
67. Species Lacuna cossmanni Locard, 1897 accepted as Benthobia tryonii Dall, 1889
68. Species Lacuna craspedomphalus Cossmann, 1888 † accepted as Pseudocirsope craspedomphalus (Cossmann, 1888) † (unaccepted > superseded combination)
69. Species Lacuna cuisensis Cossmann, 1888 † accepted as Epheria cuisensis (Cossmann, 1888) † (unaccepted > superseded combination)
70. Species Lacuna degrangei Cossmann & Peyrot, 1919 † accepted as Pseudocirsope degrangei (Cossmann & Peyrot, 1919) † (original combination)
71. Species Lacuna disjuncta de Raincourt & Munier-Chalmas, 1863 † accepted as Macromphalus disjunctus (de Raincourt & Munier-Chalmas, 1863) † (unaccepted > superseded combination)
72. Species Lacuna divaricata (O. Fabricius, 1780) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
73. Species Lacuna eburnaeformis F. Sandberger, 1859 † accepted as Pseudocirsope eburnaeformis (F. Sandberger, 1859) † (unaccepted > superseded combination)
74. Species Lacuna effusa Deshayes, 1861 † accepted as Medoriopsis effusa (Deshayes, 1861) † (original combination)
75. Species Lacuna elegans Deshayes, 1861 † accepted as Macromphalus elegans (Deshayes, 1861) † (unaccepted > superseded combination)
76. Species Lacuna exilis Murdoch, 1900 † accepted as Radinista exilis (Murdoch, 1900) † (superseded combination)
77. Species Lacuna fragilis Deshayes, 1861 † accepted as Nozeba fragilis (Deshayes, 1861) † (unaccepted > superseded combination)
78. Species Lacuna frigida Lovén, 1846 accepted as Lacuna vincta (Montagu, 1803) (synonym)
79. Species Lacuna galeodina O. Boettger, 1907 † accepted as Pseudocirsope galeodina (O. Boettger, 1907) † (original combination)
80. Species Lacuna glacialis Møller, 1842 accepted as Lacuna crassior (Montagu, 1803) (synonym)
81. Species Lacuna gracilior Metcalfe, 1844 accepted as Lacuna vincta (Montagu, 1803) (synonym)
82. Species Lacuna heberti Vélain, 1877 accepted as Rissoella heberti (Vélain, 1877) (original combination)
83. Species Lacuna indica E. A. Smith, 1894 accepted as Macromphalus indicus (E. A. Smith, 1894) (original combination)
84. Species Lacuna inflata A. Adams, 1861 accepted as Lacuna decorata A. Adams, 1861
85. Species Lacuna intermedia Locard, 1886 accepted as Lacuna parva (da Costa, 1778) (synonym)
86. Species Lacuna labiosa Lovén, 1846 accepted as Lacuna vincta (Montagu, 1803) (synonym)
87. Species Lacuna loustaui Deshayes, 1861 † accepted as Epheria loustaui (Deshayes, 1861) † (unaccepted > superseded combination)
88. Species Lacuna loveni Bayan, 1873 † accepted as Elachisina loveni (Bayan, 1873) † (unaccepted > superseded combination)
89. Species Lacuna macmurdensis Hedley, 1911 accepted as Trilirata macmurdensis (Hedley, 1911) (original combination)
90. Species Lacuna macromphalus Morlet, 1888 † accepted as Pseudocirsope macromphalus (Morlet, 1888) † (unaccepted > superseded combination)
91. Species Lacuna margaritifera R. B. Watson, 1880 accepted as Cithna margaritifera (R. B. Watson, 1880) (original combination)
92. Species Lacuna marginata Deshayes, 1861 † accepted as Cirsope marginata (Deshayes, 1861) † (unaccepted > superseded combination)
93. Species Lacuna mediterranea Monterosato, 1869 accepted as Ersilia mediterranea (Monterosato, 1869) (original combination)
94. Species Lacuna microscopica Staadt, 1913 † accepted as Medoriopsis microscopica (Staadt, 1913) † (unaccepted > superseded combination)
95. Species Lacuna minutissima Deshayes, 1861 † accepted as Elachisina minutissima (Deshayes, 1861) † (unaccepted > superseded combination)
96. Species Lacuna mirabilis Deshayes, 1861 † accepted as Epheria mirabilis (Deshayes, 1861) † (unaccepted > superseded combination)
97. Species Lacuna neritoidea A. Gould, 1840 accepted as Lacuna pallidula (da Costa, 1778) (junior subjective synonym)
98. Species Lacuna notorcadensis Melvill & Standen, 1907 accepted as Laevilitorina wandelensis (E. Lamy, 1906) (unaccepted > junior subjective synonym)
99. Species Lacuna oxytropis Pilsbry, 1895 accepted as Lacuna carinifera A. Adams, 1853
100. Species Lacuna paludinaeformis Deshayes, 1861 † accepted as Medoriopsis paludinaeformis (Deshayes, 1861) † (unaccepted > superseded combination)
101. Species Lacuna parvula Vélain, 1877 accepted as Scrobs parvula (Vélain, 1877) (original combination)
102. Species Lacuna patula Thorpe, 1844 accepted as Lacuna pallidula (da Costa, 1778) (synonym)
103. Species Lacuna pertusa Conrad, 1831 accepted as Lacuna vincta (Montagu, 1803) (synonym)
104. Species Lacuna pezanti Cossmann, 1896 † accepted as Cirsope pezanti (Cossmann, 1896) † (unaccepted > superseded combination)
105. Species Lacuna praelonga Deshayes, 1861 † accepted as Ceratia praelonga (Deshayes, 1861) † (unaccepted > superseded combination)
106. Species Lacuna puteolina Locard, 1886 accepted as Lacuna parva (da Costa, 1778) (synonym)
107. Species Lacuna puteolus (W. Turton, 1819) accepted as Lacuna parva (da Costa, 1778) (synonym)
108. Species Lacuna quadrifasciata (Montagu, 1803) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
109. Species Lacuna scalariformis Morlet, 1888 † accepted as Macromphalus scalariformis (Morlet, 1888) † (unaccepted > superseded combination)
110. Species Lacuna setonaikaiensis (Habe, 1958) accepted as Lacuna carinifera A. Adams, 1853
111. Species Lacuna solidula Lovén, 1846 accepted as Lacuna vincta (Montagu, 1803) (synonym)
112. Species Lacuna staadti Cossmann, 1907 † accepted as Pseudocirsope staadti (Cossmann, 1907) † (unaccepted > superseded combination)
113. Species Lacuna subeffusa F. Sandberger, 1859 † accepted as Pseudocirsope subeffusa (F. Sandberger, 1859) † (unaccepted > superseded combination)
114. Species Lacuna tenella Jeffreys, 1869 accepted as Benthonella tenella (Jeffreys, 1869)
115. Species Lacuna terebralis Cossmann, 1885 † accepted as Macromphalus terebralis (Cossmann, 1885) † (unaccepted > superseded combination)
116. Species Lacuna unicarinata E. A. Smith, 1875 accepted as Lacuna carinifera A. Adams, 1853 (junior synonym)
117. Species Lacuna vestita Dunker & Metzger, 1875 accepted as Lacuna crassior (Montagu, 1803) (synonym)
118. Species Lacuna wandelensis E. Lamy, 1906 accepted as Laevilitorina wandelensis (E. Lamy, 1906) (original combination)
119. Species Lacuna wateleti Cossmann, 1888 † accepted as Pseudocirsope wateleti (Cossmann, 1888) † (unaccepted > superseded combination)
120. Species Lacuna antiqua McCoy, 1844 † (uncertain > unassessed)
121. Species Lacuna dudariensis Strausz, 1966 † (uncertain > taxon inquirendum)
122. Species Lacuna globosa E. A. Smith, 1904 (uncertain > taxon inquirendum)
123. Species Lacuna punctata Gabb, 1873 † (uncertain > unassessed)
124. Species Lacuna stenotomorpha Pilsbry, 1895 (uncertain > taxon inquirendum)
125. Species Lacuna tenuistriata Melvill, 1899 (uncertain > unassessed, use in recent literature not established by editor)

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