1. Subgenus Clausilia (Acroeuxina) O. Boettger, 1877 accepted as Elia (Acroeuxina) O. Boettger, 1877 represented as Elia H. Adams & A. Adams, 1855 (unaccepted > superseded combination, basionym)
2. Subgenus Clausilia (Acrophaedusa) O. Boettger, 1877 accepted as Oospira W. T. Blanford, 1872 (unaccepted > junior subjective synonym)
3. Subgenus Clausilia (Acrotoma) O. Boettger, 1881 accepted as Acrotoma O. Boettger, 1881 (original rank)
4. Subgenus Clausilia (Adriaca) Westerlund, 1884 accepted as Delima (Semirugata) O. Boettger, 1877 represented as Delima W. Hartmann, 1842 (unaccepted > junior subjective synonym)
5. Subgenus Clausilia (Agathylla) H. Adams & A. Adams, 1855 accepted as Agathylla H. Adams & A. Adams, 1855 (original rank)
6. Subgenus Clausilia (Albanica) O. Boettger, 1878 accepted as Delima W. Hartmann, 1842
7. Subgenus Clausilia (Albinaria) Vest, 1867 accepted as Albinaria Vest, 1867
8. Subgenus Clausilia (Alinda) H. Adams & A. Adams, 1855 accepted as Alinda H. Adams & A. Adams, 1855 (original rank)
9. Subgenus Clausilia (Alopia) H. Adams & A. Adams, 1855 accepted as Alopia H. Adams & A. Adams, 1855 (original rank)
10. Subgenus Clausilia (Andraea) L. Pfeiffer, 1848 represented as Clausilia Draparnaud, 1805
11. Subgenus Clausilia (Apoma) H. Beck, 1837 accepted as Apoma H. Beck, 1837 (unaccepted > superseded combination)
12. Subgenus Clausilia (Archipelagica) O. Boettger, 1878 accepted as Albinaria Vest, 1867 (unaccepted > junior objective synonym)
13. Subgenus Clausilia (Armeniaca) accepted as Clausilia (Armenica) O. Boettger, 1877 accepted as Armenica O. Boettger, 1877 (unaccepted > misspelling - incorrect subsequent spelling)
14. Subgenus Clausilia (Armenica) O. Boettger, 1877 accepted as Armenica O. Boettger, 1877 (original rank)
15. Subgenus Clausilia (Balea) J. E. Gray, 1824 represented as Balea J. E. Gray, 1824
16. Subgenus Clausilia (Bathyclista) O. Boettger, 1885 accepted as Isabellaria Vest, 1867 (unaccepted > junior subjective synonym)
17. Subgenus Clausilia (Bigibbosa) O. Boettger, 1878 accepted as Albinaria Vest, 1867
18. Subgenus Clausilia (Binodata) O. Boettger, 1877 accepted as Delima W. Hartmann, 1842 (unaccepted > junior subjective synonym)
19. Subgenus Clausilia (Bosnica) Westerlund, 1884 accepted as Herilla H. Adams & A. Adams, 1855
20. Subgenus Clausilia (Canalicia) O. Boettger, 1863 † accepted as Canalicia O. Boettger, 1863 † (unaccepted > superseded rank)
21. Subgenus Clausilia (Carinigera) Möllendorff, 1873 accepted as Carinigera Möllendorff, 1873 (unaccepted > superseded rank)
22. Subgenus Clausilia (Caucasica) O. Boettger, 1877 accepted as Elia (Caucasica) O. Boettger, 1877 represented as Elia H. Adams & A. Adams, 1855 (unaccepted > superseded combination, basionym)
23. Subgenus Clausilia (Cerigana) O. Boettger, 1878 accepted as Albinaria (Cerigana) O. Boettger, 1878 represented as Albinaria Vest, 1867 (unaccepted > superseded combination)
24. Subgenus Clausilia (Charpentieria) Stabile, 1864 accepted as Charpentieria Stabile, 1864
25. Subgenus Clausilia (Clausilia) Draparnaud, 1805 represented as Clausilia Draparnaud, 1805
26. Subgenus Clausilia (Clausiliastra) L. Pfeiffer, 1856 accepted as Cochlodina A. Férussac, 1821 (unaccepted > junior objective synonym, junior objective synonym of Cochlodina, with the same type species)
27. Subgenus Clausilia (Cochlodina) A. Férussac, 1821 accepted as Cochlodina A. Férussac, 1821
28. Subgenus Clausilia (Constricta) O. Boettger, 1877 † accepted as Constricta O. Boettger, 1877 † (unaccepted > superseded rank)
29. Subgenus Clausilia (Corrugata) O. Boettger, 1878 accepted as Albinaria (Mirabellina) O. Boettger, 1878 represented as Albinaria Vest, 1867
30. Subgenus Clausilia (Cossmannia) Babor, 1897 † accepted as Baboria Cossmann, 1898 † (unaccepted > junior homonym, junior homonym of Cossmannia Newton, 1891; Baboria is a replacement name)
31. Subgenus Clausilia (Cretica) O. Boettger, 1878 accepted as Albinaria (Cretica) O. Boettger, 1878 represented as Albinaria Vest, 1867
32. Subgenus Clausilia (Cristaria) Westerlund, 1884 accepted as Cristataria Vest, 1867 (unaccepted > junior homonym, Invalid: junior homonym of Cristaria Schumacher, 1817)
33. Subgenus Clausilia (Cristataria) Vest, 1867 accepted as Cristataria Vest, 1867 (original rank)
34. Subgenus Clausilia (Cusmicia) accepted as Alinda H. Adams & A. Adams, 1855 (unaccepted > junior subjective synonym)
35. Subgenus Clausilia (Cylindrophaedusa) O. Boettger, 1877 accepted as Cylindrophaedusa O. Boettger, 1877 (original rank)
36. Subgenus Clausilia (Dalmatica) O. Boettger, 1877 accepted as Delima (Delima) W. Hartmann, 1842 represented as Delima W. Hartmann, 1842 (unaccepted > junior subjective synonym)
37. Subgenus Clausilia (Delima) W. Hartmann, 1842 accepted as Delima W. Hartmann, 1842 (original name)
38. Subgenus Clausilia (Diadoma) Westerlund, 1901 accepted as Albinaria (Diadoma) Westerlund, 1901 represented as Albinaria Vest, 1867
39. Subgenus Clausilia (Diceratoptyx) Pilsbry, 1905 accepted as Zaptyx Pilsbry, 1900 (junior synonym)
40. Subgenus Clausilia (Dilataria) Vest, 1867 accepted as Dilataria Vest, 1867 (considered a separate genus)
41. Subgenus Clausilia (Disjunctaria) O. Boettger, 1877 † accepted as Disjunctaria O. Boettger, 1877 † (unaccepted > superseded rank)
42. Subgenus Clausilia (Egana) O. Boettger, 1878 accepted as Albinaria (Egana) O. Boettger, 1878 represented as Albinaria Vest, 1867
43. Subgenus Clausilia (Elia) H. Adams & A. Adams, 1855 accepted as Elia H. Adams & A. Adams, 1855 (original rank)
44. Subgenus Clausilia (Emarginaria) O. Boettger, 1877 † accepted as Emarginaria O. Boettger, 1877 † (unaccepted > superseded combination)
45. Subgenus Clausilia (Eruca) Swainson, 1840 accepted as Lauria J. E. Gray, 1840 (junior objective synonym)
46. Subgenus Clausilia (Eualopia) O. Boettger, 1877 † accepted as Eualopia O. Boettger, 1877 † (unaccepted > superseded rank)
47. Subgenus Clausilia (Eualopia) Westerlund, 1884 accepted as Alopia H. Adams & A. Adams, 1855 (unaccepted > junior subjective synonym)
48. Subgenus Clausilia (Euclausta) Oppenheim, 1890 † accepted as Disjunctaria (Euclausta) Oppenheim, 1890 † represented as Disjunctaria O. Boettger, 1877 †
49. Subgenus Clausilia (Euclista) O. Boettger, 1878 accepted as Isabellaria Vest, 1867
50. Subgenus Clausilia (Euphaedusa) O. Boettger, 1877 accepted as Euphaedusa O. Boettger, 1877 (unaccepted > superseded combination)
51. Subgenus Clausilia (Eutriloba) Westerlund, 1884 accepted as Triloba Vest, 1867 (unaccepted > junior objective synonym)
52. Subgenus Clausilia (Eutriptychia) O. Boettger, 1877 † accepted as Triptychia F. Sandberger, 1875 † (unaccepted > junior subjective synonym)
53. Subgenus Clausilia (Euxina) O. Boettger, 1877 accepted as Euxina O. Boettger, 1877 (original rank)
54. Subgenus Clausilia (Euxinastra) O. Boettger, 1888 accepted as Euxinastra O. Boettger, 1888 (unaccepted > superseded combination, original rank)
55. Subgenus Clausilia (Filumna) O. Boettger, 1878 accepted as Cristataria Vest, 1867 (unaccepted > junior subjective synonym)
56. Subgenus Clausilia (Florienia) Pallary, 1939 accepted as Cristataria Vest, 1867 (unaccepted > unavailable name)
57. Subgenus Clausilia (Formosana) O. Boettger, 1877 accepted as Formosana O. Boettger, 1877 (original rank)
58. Subgenus Clausilia (Fusulus) Fitzinger, 1833 accepted as Fusulus Fitzinger, 1833 (unaccepted rank)
59. Subgenus Clausilia (Galeata) O. Boettger, 1877 accepted as Galeata O. Boettger, 1877 (unaccepted > superseded combination)
60. Subgenus Clausilia (Garnieria) Bourguignat, 1877 accepted as Garnieria Bourguignat, 1877
61. Subgenus Clausilia (Gibbula) O. Boettger, 1877 accepted as Charpentieria (Gibbularia) Cecconi, 1908 accepted as Gibbularia Cecconi, 1908 (unaccepted > junior homonym, junior homonym of Gibbula Risso, 1826 [Trochidae])
62. Subgenus Clausilia (Graja) O. Boettger, 1878 accepted as Albinaria (Graja) O. Boettger, 1878 represented as Albinaria Vest, 1867
63. Subgenus Clausilia (Hemiphaedusa) O. Boettger, 1877 accepted as Hemiphaedusa O. Boettger, 1877 (unaccepted > superseded combination)
64. Subgenus Clausilia (Hemizaptyx) Pilsbry, 1905 accepted as Zaptyx (Hemizaptyx) Pilsbry, 1905 represented as Zaptyx Pilsbry, 1900
65. Subgenus Clausilia (Herilla) H. Adams & A. Adams, 1855 accepted as Herilla H. Adams & A. Adams, 1855 (original rank)
66. Subgenus Clausilia (Hetaera) O. Boettger, 1877 accepted as Euxina O. Boettger, 1877
67. Subgenus Clausilia (Heteroptycha) Westerlund, 1884 accepted as Montenegrina O. Boettger, 1877 (unaccepted > junior subjective synonym)
68. Subgenus Clausilia (Heterozaptyx) Pilsbry, 1906 accepted as Heterozaptyx Pilsbry, 1906 accepted as Zaptyx Pilsbry, 1900 (unaccepted > superseded rank)
69. Subgenus Clausilia (Hollabrunnella) H. Nordsieck, 2007 † accepted as Hollabrunnella H. Nordsieck, 2007 † (unaccepted > superseded rank)
70. Subgenus Clausilia (Idiozaptyx) Pilsbry, 1909 accepted as Zaptyx Pilsbry, 1900 (junior synonym)
71. Subgenus Clausilia (Idyla) H. Adams & A. Adams, 1855 accepted as Idyla H. Adams & A. Adams, 1855 (original rank)
72. Subgenus Clausilia (Imitatrix) Westerlund, 1884 accepted as Lampedusa (Imitatrix) Westerlund, 1884 represented as Lampedusa O. Boettger, 1877
73. Subgenus Clausilia (Index) O. Boettger, 1877 accepted as Mucronaria (Index) O. Boettger, 1877 represented as Mucronaria O. Boettger, 1877 (unaccepted > superseded combination, basionym)
74. Subgenus Clausilia (Interstriata) O. Boettger, 1878 accepted as Albinaria (Interstriata) O. Boettger, 1878 accepted as Albinaria (Mirabellina) O. Boettger, 1878 represented as Albinaria Vest, 1867 (unaccepted > junior subjective synonym)
75. Subgenus Clausilia (Iphigenia) J. E. Gray, 1840 accepted as Iphigenia J. E. Gray, 1840 accepted as Alinda H. Adams & A. Adams, 1855 (unaccepted > superseded rank)
76. Subgenus Clausilia (Isabellaria) Vest, 1867 accepted as Isabellaria Vest, 1867 (original rank)
77. Subgenus Clausilia (Itala) O. Boettger, 1877 accepted as Itala O. Boettger, 1877 accepted as Charpentieria Stabile, 1864 (original rank)
78. Subgenus Clausilia (Ithyption) Dean, 1918 accepted as Alopia H. Adams & A. Adams, 1855
79. Subgenus Clausilia (Kuzmicia) Brusina, 1870 accepted as Alinda H. Adams & A. Adams, 1855 (junior synonym)
80. Subgenus Clausilia (Laciniaria) Hartmann, 1842 accepted as Laciniaria W. Hartmann, 1842 (original name)
81. Subgenus Clausilia (Laconica) O. Boettger, 1878 accepted as Albinaria (Laconica) O. Boettger, 1878 represented as Albinaria Vest, 1867
82. Subgenus Clausilia (Laevissima) O. Boettger, 1877 accepted as Laevissima O. Boettger, 1877 accepted as Delima W. Hartmann, 1842 (unaccepted > superseded combination)
83. Subgenus Clausilia (Laminifera) O. Boettger, 1863 accepted as Laminifera O. Boettger, 1863 † (considered a separate genus)
84. Subgenus Clausilia (Lampedusa) O. Boettger, 1877 accepted as Lampedusa O. Boettger, 1877 (unaccepted > superseded combination)
85. Subgenus Clausilia (Lombardiella) H. Nordsieck, 2013 represented as Clausilia Draparnaud, 1805
86. Subgenus Clausilia (Lopadusaria) Monterosato, 1892 accepted as Lampedusa O. Boettger, 1877 (Invalid: unjustified emendation of Lampedusa)
87. Subgenus Clausilia (Luchuphaedusa) Pilsbry, 1901 accepted as Stereophaedusa (Luchuphaedusa) Pilsbry, 1901 represented as Stereophaedusa O. Boettger, 1877 (unaccepted > superseded combination)
88. Subgenus Clausilia (Macedonica) O. Boettger, 1877 accepted as Macedonica O. Boettger, 1877 (unaccepted > superseded rank)
89. Subgenus Clausilia (Macrodontes) Swainson, 1840 accepted as Macrodontes Swainson, 1840 accepted as Odontostomus H. Beck, 1837 (unaccepted > junior subjective synonym)
90. Subgenus Clausilia (Macrophaedusa) Möllendorff, 1883 accepted as Macrophaedusa Möllendorff, 1883 (unaccepted combination)
91. Subgenus Clausilia (Macroptychia) O. Boettger, 1877 accepted as Macroptychia O. Boettger, 1877 (unaccepted > superseded rank)
92. Subgenus Clausilia (Marpessa) J. E. Gray, 1821 accepted as Marpessa J. E. Gray, 1821 accepted as Cochlodina A. Férussac, 1821
93. Subgenus Clausilia (Mauritanica) O. Boettger, 1879 accepted as Mauritanica O. Boettger, 1879
94. Subgenus Clausilia (Medora) H. Adams & A. Adams, 1855 accepted as Medora H. Adams & A. Adams, 1855 (original rank)
95. Subgenus Clausilia (Megaleuxina) O. Boettger, 1877 accepted as Elia (Megaleuxina) O. Boettger, 1877 represented as Elia H. Adams & A. Adams, 1855 (unaccepted > superseded combination, basionym)
96. Subgenus Clausilia (Megalophaedusa) O. Boettger, 1877 accepted as Megalophaedusa O. Boettger, 1877
97. Subgenus Clausilia (Mentissa) H. Adams & A. Adams, 1855 accepted as Mentissa H. Adams & A. Adams, 1855 (original rank)
98. Subgenus Clausilia (Mentissoidea) O. Boettger, 1877 accepted as Mentissoidea O. Boettger, 1877 (unaccepted > superseded combination)
99. Subgenus Clausilia (Metazaptyx) Pilsbry, 1905 accepted as Zaptyx (Zaptyx) Pilsbry, 1900 represented as Zaptyx Pilsbry, 1900 (junior synonym)
100. Subgenus Clausilia (Micropontica) O. Boettger, 1881 (unaccepted, original rank)
101. Subgenus Clausilia (Mira) O. Boettger, 1877 (unaccepted > junior homonym, Invalid: junior homonym of Mira Schellenberg, 1803 [Diptera])
102. Subgenus Clausilia (Mirabellina) O. Boettger, 1878 (unaccepted)
103. Subgenus Clausilia (Montenegrina) O. Boettger, 1877 (unaccepted, original rank)
104. Subgenus Clausilia (Mucronaria) O. Boettger, 1877 (unaccepted, original rank)
105. Subgenus Clausilia (Munda) O. Boettger, 1878 (unaccepted, invalid: junior homonym of Munda Stal, 1877 [Orthoptera]; Mundaria Lindholm, 1924, and Cathariella are replacement names)
106. Subgenus Clausilia (Naevosa) O. Boettger, 1878 (unaccepted)
107. Subgenus Clausilia (Nenia) H. Adams & A. Adams, 1855 (unaccepted > superseded rank)
108. Subgenus Clausilia (Neostyriaca) A. J. Wagner, 1920 (unaccepted > superseded combination, original name and rank)
109. Subgenus Clausilia (Nesiophaedusa) Pilsbry, 1905 (unaccepted)
110. Subgenus Clausilia (Oligoptychia) O. Boettger, 1877 (unaccepted, Invalid: junior objective synonym of Idyla)
111. Subgenus Clausilia (Oligozaptyx) Pilsbry, 1905 (unaccepted, junior synonym)
112. Subgenus Clausilia (Olympia) Vest, 1867 (unaccepted > junior homonym, invalid: junior homonym of Olympia Risso, 1826 [Crustacea]; Olympicola is a replacement name )
113. Subgenus Clausilia (Oophaedusa) Pilsbry, 1905 (unaccepted > superseded rank)
114. Subgenus Clausilia (Oospira) W. T. Blanford, 1872 (unaccepted)
115. Subgenus Clausilia (Paestana) Westerlund, 1884 (unaccepted)
116. Subgenus Clausilia (Papillifera) W. Hartmann, 1842 (unaccepted, original name)
117. Subgenus Clausilia (Papillina) Moquin-Tandon, 1856 (unaccepted > junior subjective synonym)
118. Subgenus Clausilia (Paraphaedusa) O. Boettger, 1899 (unaccepted > superseded combination)
119. Subgenus Clausilia (Parazaptyx) Pilsbry, 1905 (unaccepted, basionym)
120. Subgenus Clausilia (Peneptychia) Westerlund, 1884 (unaccepted > junior objective synonym)
121. Subgenus Clausilia (Phaedusa) H. Adams & A. Adams, 1855 (unaccepted, original rank)
122. Subgenus Clausilia (Piceata) O. Boettger, 1877 (unaccepted > junior subjective synonym)
123. Subgenus Clausilia (Pirostoma) Möllendorff, 1873 (unaccepted, unjustified emendation)
124. Subgenus Clausilia (Pliodiptychia) H. Nordsieck, 1978 † (unaccepted > superseded rank)
125. Subgenus Clausilia (Plioptychia) O. Boettger, 1877 † (unaccepted > junior subjective synonym)
126. Subgenus Clausilia (Polloneria) Sacco, 1886 † (unaccepted > superseded rank)
127. Subgenus Clausilia (Polyptychia) O. Boettger, 1877 (unaccepted > junior homonym, Junior homonym of Polyptychia Felder, 1874 [Lepidoptera])
128. Subgenus Clausilia (Proalbinaria) O. Boettger, 1895 † (unaccepted > superseded rank)
129. Subgenus Clausilia (Profuga) O. Boettger, 1878 (unaccepted)
130. Subgenus Clausilia (Pseudalinda) O. Boettger, 1877 (unaccepted > superseded combination)
131. Subgenus Clausilia (Pseudidyla) O. Boettger, 1877 † (unaccepted > superseded rank)
132. Subgenus Clausilia (Pseudonenia) O. Boettger, 1877 (unaccepted > superseded combination)
133. Subgenus Clausilia (Pupa) Draparnaud, 1801 (unaccepted > junior subjective synonym)
134. Subgenus Clausilia (Pupella) Swainson, 1840 (unaccepted > junior subjective synonym, invalid: junior homonym of Pupella Bory de Saint-Vincent, 1827 [Protozoa])
135. Subgenus Clausilia (Pyrostoma) Vest, 1867 (unaccepted > junior objective synonym)
136. Subgenus Clausilia (Quadriplicata) O. Boettger, 1878 (unaccepted > superseded rank)
137. Subgenus Clausilia (Reinia) Kobelt, 1876 (unaccepted > superseded combination)
138. Subgenus Clausilia (Rhipsauchenia) O. Boettger, 1890 (unaccepted > junior subjective synonym)
139. Subgenus Clausilia (Robusta) O. Boettger, 1877 (unaccepted > superseded combination)
140. Subgenus Clausilia (Scopulosa) O. Boettger, 1878 (unaccepted)
141. Subgenus Clausilia (Selenoptyx) Pilsbry, 1908 (unaccepted, unaccepted combination)
142. Subgenus Clausilia (Semirugata) O. Boettger, 1877 (unaccepted > superseded combination)
143. Subgenus Clausilia (Sericata) O. Boettger, 1878 (unaccepted > junior subjective synonym)
144. Subgenus Clausilia (Serrulina) Mousson, 1873 (unaccepted)
145. Subgenus Clausilia (Siciliaria) Vest, 1867 (unaccepted > superseded rank)
146. Subgenus Clausilia (Spoliata) Frankenberger, 1913 (unaccepted)
147. Subgenus Clausilia (Stereophaedusa) O. Boettger, 1877 (unaccepted > superseded combination, original name)
148. Subgenus Clausilia (Stereozaptyx) Pilsbry, 1905 (unaccepted > superseded combination)
149. Subgenus Clausilia (Stigmatica) O. Boettger, 1877 (unaccepted > superseded combination)
150. Subgenus Clausilia (Strangulata) Westerlund, 1884 (unaccepted)
151. Subgenus Clausilia (Striata) O. Boettger, 1878 (unaccepted)
152. Subgenus Clausilia (Strigillaria) Vest, 1867 (unaccepted)
153. Subgenus Clausilia (Strobeliella) H. Nordsieck, 1977 (alternative representation)
154. Subgenus Clausilia (Strobilus) Anton, 1838 (unaccepted)
155. Subgenus Clausilia (Strumosa) O. Boettger, 1877 (unaccepted, original rank)
156. Subgenus Clausilia (Teres) O. Boettger, 1878 (unaccepted)
157. Subgenus Clausilia (Thalestris) Lindholm, 1913 (unaccepted, Invalid: junior homonym of Thalestris Claus, 1860 [Crustacea])
158. Subgenus Clausilia (Thaumatoptyx) Pilsbry, 1908 (unaccepted, original combination)
159. Subgenus Clausilia (Tirolica) O. Boettger, 1877 (unaccepted > junior subjective synonym)
160. Subgenus Clausilia (Triloba) Vest, 1867 (unaccepted > superseded rank)
161. Subgenus Clausilia (Triptychia) F. Sandberger, 1875 † (unaccepted > superseded rank)
162. Subgenus Clausilia (Tyrannophaedusa) Pilsbry, 1900 (unaccepted > superseded combination, basionym)
163. Subgenus Clausilia (Uncinaria) Vest, 1867 (unaccepted)
164. Subgenus Clausilia (Wagneria) Hesse, 1912 (unaccepted > junior homonym, non Wagneria Robineau-Desvoidy, 1830 [Diptera], and others)
165. Subgenus Clausilia (Westerlundella) Lindholm, 1924 (unaccepted > superseded rank)
166. Subgenus Clausilia (Zaptyx) Pilsbry, 1900 (unaccepted)
167. Species Clausilia abietina Dupuy, 1849 (unaccepted, original rank)
168. Species Clausilia aborensis Godwin-Austen, 1918 (unaccepted, original combination)
169. Species Clausilia abrupta Küster, 1847 (unaccepted, original combination)
170. Species Clausilia abyssoclista O. Boettger, 1883 (unaccepted, original name)
171. Species Clausilia acanthula Heude, 1885 (unaccepted, original combination and rank)
172. Species Clausilia acicula Cantraine, 1835 (uncertain > taxon inquirendum)
173. Species Clausilia aciculata Bavay & Dautzenberg, 1909 (unaccepted, original combination)
174. Species Clausilia acridula Rossmässler, 1836 (unaccepted, junior synonym)
175. Species Clausilia acrolepta E. von Martens, 1876 (unaccepted > junior subjective synonym)
176. Species Clausilia acrostoma Bavay & Dautzenberg, 1909 (unaccepted, original combination)
177. Species Clausilia aculus W. H. Benson, 1842 (unaccepted, original combination)
178. Species Clausilia adamsiana L. Pfeiffer, 1861 (unaccepted, original combination)
179. Species Clausilia adaucta Gredler, 1889 (unaccepted, invalid; not A. & G. Villa, 1841, Euphaedusa gredleri is a replacement name)
180. Species Clausilia adaucta Porro, 1841 (uncertain > taxon inquirendum)
181. Species Clausilia adelina Küster, 1847 (unaccepted, junior synonym)
182. Species Clausilia adjacensis Shuttleworth, 1843 (unaccepted, original combination)
183. Species Clausilia adposita Strobel, 1854 (uncertain, invalid; not Charpentier, 1852)
184. Species Clausilia adspirationis L. Pfeiffer, 1868 (unaccepted, junior synonym)
185. Species Clausilia aenea Pilsbry, 1903 (unaccepted, original combination)
186. Species Clausilia aenigmatica Sykes, 1893 (uncertain > taxon inquirendum)
187. Species Clausilia aethiops Möllendorff, 1882 (unaccepted, original combination)
188. Species Clausilia affinis R. A. Philippi, 1836 (unaccepted > superseded combination, basionym)
189. Species Clausilia agesilaos O. Boettger, 1878 (unaccepted, incorrect subsequent spelling)
190. Species Clausilia agesilaus E. von Martens, 1873 (unaccepted, basionym)
191. Species Clausilia aggesta O. Boettger, 1878 (unaccepted, original combination)
192. Species Clausilia agna Pilsbry, 1902 (unaccepted, original combination)
193. Species Clausilia agnata L. Pfeiffer, 1842 (unaccepted, original combination)
194. Species Clausilia agnella Charpentier, 1852 (unaccepted, junior synonym)
195. Species Clausilia agrigentina Westerlund, 1890 (unaccepted > junior subjective synonym)
196. Species Clausilia albersi Bourguignat, 1852 (unaccepted > superseded combination, original name)
197. Species Clausilia albescens Menke, 1830 (unaccepted, original name)
198. Species Clausilia albescens Rossmässler, 1836 (unaccepted > junior homonym, invalid: not Menke, 1830)
199. Species Clausilia albicosta O. Boettger, 1877 (unaccepted, original combination)
200. Species Clausilia albida L. Pfeiffer, 1846 (unaccepted, junior synonym)
201. Species Clausilia albocincta L. Pfeiffer, 1841 (unaccepted, original combination)
202. Species Clausilia alboguttata J. A. Wagner, 1829 (unaccepted > junior subjective synonym)
203. Species Clausilia alboguttulata Küster, 1850 (unaccepted, a junior synonym)
204. Species Clausilia albolabris L. Pfeiffer, 1848 (unaccepted, junior synonym)
205. Species Clausilia almissana Küster, 1847 (unaccepted, original combination)
206. Species Clausilia altecostata L. Pfeiffer, 1866 (unaccepted, original combination)
207. Species Clausilia alternata Möllendorff, 1896 (unaccepted > superseded combination, unaccepted combination)
208. Species Clausilia alticola E. von Martens, 1891 (unaccepted, original combination)
209. Species Clausilia amiatae E. von Martens, 1873 (unaccepted > superseded combination)
210. Species Clausilia amoena L. Pfeiffer, 1848 (unaccepted, original combination)
211. Species Clausilia amorgia O. Boettger, 1878 (unaccepted, basionym)
212. Species Clausilia amphiodon Reuss, 1861 † (unaccepted > superseded combination)
213. Species Clausilia anatolica J. R. Roth, 1839 (unaccepted, original name)
214. Species Clausilia andecola Morelet, 1863 (unaccepted > superseded combination)
215. Species Clausilia andusiensis Coutagne, 1886 (unaccepted, basionym)
216. Species Clausilia angistoma Küster, 1876 (unaccepted, junior synonym)
217. Species Clausilia angistoma Rossmässler, 1835 (unaccepted, junior synonym)
218. Species Clausilia angrandi Morelet, 1863 (unaccepted > superseded combination)
219. Species Clausilia anguina L. Pfeiffer, 1866 (unaccepted, junior synonym)
220. Species Clausilia angulata A. Schmidt, 1868 (unaccepted, junior synonym)
221. Species Clausilia angustata E. A. Bielz, 1859 (unaccepted, original combination)
222. Species Clausilia angustella L. Pfeiffer, 1866 (unaccepted, junior synonym)
223. Species Clausilia angusticollis Küster, 1876 (unaccepted, original combination)
224. Species Clausilia annandalei Preston, 1915 (unaccepted, original combination)
225. Species Clausilia antilopina Heude, 1885 (unaccepted, original combination)
226. Species Clausilia antiochica Kobelt, 1892 (unaccepted > nomen nudum)
227. Species Clausilia antiperversa (A. Férussac, 1832) (unaccepted > junior subjective synonym)
228. Species Clausilia antiqua (Matheron, 1832) † (unaccepted > junior homonym, junior homonym of Pupa antiqua Zieten, 1832; Pupa subantiqua is a replacement name)
229. Species Clausilia antiqua Zieten, 1832 † (unaccepted > superseded combination)
230. Species Clausilia antiquior K. Miller, 1907 † (unaccepted > superseded combination)
231. Species Clausilia aperta Küster, 1861 (unaccepted, original combination)
232. Species Clausilia apfelbecki Sturany, 1907 (unaccepted, original combination)
233. Species Clausilia aphrodite O. Boettger, 1883 (unaccepted, original name)
234. Species Clausilia aplostoma Heude, 1885 (unaccepted, original combination)
235. Species Clausilia approximans A. Schmidt, 1856 (unaccepted, original combination)
236. Species Clausilia aprivora Heude, 1887 (unaccepted, junior synonym)
237. Species Clausilia aptychia Möllendorff, 1882 (unaccepted, junior synonym)
238. Species Clausilia aquila L. Pfeiffer, 1846 (unaccepted, original combination)
239. Species Clausilia arakana Stoliczka, 1872 (unaccepted, original combination)
240. Species Clausilia aratorum Pilsbry, 1903 (unaccepted, original combination)
241. Species Clausilia arcadica L. Pfeiffer, 1868 (unaccepted, original combination)
242. Species Clausilia ardouiniana Heude, 1885 (unaccepted, original combination)
243. Species Clausilia armata Küster, 1844 (unaccepted, original combination)
244. Species Clausilia articulata F. Sandberger, 1862 † (unaccepted > superseded combination)
245. Species Clausilia artifina Heude, 1885 (unaccepted, original combination)
246. Species Clausilia asperata Pilsbry, 1905 (unaccepted, original combination)
247. Species Clausilia astropalia O. Boettger, 1883 (unaccepted, original name)
248. Species Clausilia attenuata Rossmässler, 1835 (unaccepted, original combination)
249. Species Clausilia attrita O. Boettger, 1877 (unaccepted, unaccepted combination)
250. Species Clausilia aulacophora Pilsbry, 1900 (unaccepted, original combination)
251. Species Clausilia aurantiaca O. Boettger, 1877 (unaccepted > superseded combination)
252. Species Clausilia auregani Bavay & Dautzenberg, 1904 (unaccepted, original combination)
253. Species Clausilia auricoma Bavay & Dautzenberg, 1899 (unaccepted, original combination)
254. Species Clausilia auriformis Mousson, 1859 (unaccepted > junior subjective synonym, original name)
255. Species Clausilia avia Charpentier, 1852 (unaccepted, original combination)
256. Species Clausilia awajiensis Pilsbry, 1900 (unaccepted, basionym)
257. Species Clausilia azumai Pilsbry, 1905 (unaccepted, unaccepted combination)
258. Species Clausilia babeensis Bavay & Dautzenberg, 1899 (unaccepted, original combination)
259. Species Clausilia bacillum Hanley & Theobald, 1870 (unaccepted > superseded combination, original combination)
260. Species Clausilia backanensis Bavay & Dautzenberg, 1899 (unaccepted, junior synonym)
261. Species Clausilia bajula A. Schmidt, 1868 (unaccepted, original name)
262. Species Clausilia baldensis Charpentier, 1852 (unaccepted, original combination)
263. Species Clausilia balsamo Strobel, 1850 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
264. Species Clausilia balsamoi Strobel, 1850 (unaccepted, superseded rank and combination)
265. Species Clausilia banatica Küster, 1860 (unaccepted, junior synonym)
266. Species Clausilia bargesi Bourguignat, 1868 (unaccepted > junior subjective synonym, original name)
267. Species Clausilia basileensis Rossmässler, 1835 (unaccepted, junior synonym)
268. Species Clausilia bathyclista O. Boettger, 1879 (unaccepted, original name)
269. Species Clausilia baudii Pini, 1885 (uncertain > taxon inquirendum)
270. Species Clausilia baudoni Michaud, 1862 †
271. Species Clausilia bavayana Hagenmüller, 1884 (unaccepted > superseded combination, original name)
272. Species Clausilia bavayi Lindholm, 1924 (unaccepted, original combination)
273. Species Clausilia baziniana Heude, 1890 (unaccepted, original combination)
274. Species Clausilia beaumonti Haime, 1855 † (uncertain)
275. Species Clausilia belcheri L. Pfeiffer, 1850 (unaccepted)
276. Species Clausilia belemnites O. Boettger & Schmacker, 1894 (unaccepted, original combination)
277. Species Clausilia bellotti Strobel, 1854 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
278. Species Clausilia belluccii Issel, 1880 (unaccepted, junior synonym)
279. Species Clausilia belone O. Boettger, 1879 (unaccepted, junior synonym)
280. Species Clausilia bengalensis L. Pfeiffer, 1842 (uncertain > unassessed)
281. Species Clausilia bengasiana Gambetta, 1925 (unaccepted)
282. Species Clausilia bergeri Rossmässler, 1836 (unaccepted, original combination)
283. Species Clausilia bernardii L. Pfeiffer, 1861 (unaccepted, original combination)
284. Species Clausilia berthaudi Michaud, 1877 † (unaccepted > junior subjective synonym)
285. Species Clausilia berthei Nicolas, 1894 † (unaccepted > junior subjective synonym)
286. Species Clausilia biasolettiana Charpentier, 1852 (unaccepted)
287. Species Clausilia bicarinata Rossmässler, 1839 (unaccepted, original combination)
288. Species Clausilia bicolor Charpentier, 1852 (unaccepted)
289. Species Clausilia bicolor L. Pfeiffer, 1846 (uncertain > taxon inquirendum)
290. Species Clausilia bicristata Rossmässler, 1839 (unaccepted, original combination)
291. Species Clausilia bidens (Linnaeus, 1758) (unaccepted, superseded generic combination)
292. Species Clausilia bidentata (Strøm, 1765)
293. Species Clausilia bielzii L. Pfeiffer, 1849 (unaccepted, original combination)
294. Species Clausilia bifrons A. Schmidt, 1868 (unaccepted, junior synonym)
295. Species Clausilia bigibbosa Charpentier, 1847 (unaccepted, original name)
296. Species Clausilia bilabiata Rossmässler, 1839 (unaccepted, junior synonym)
297. Species Clausilia bilabiata J. A. Wagner, 1829 (unaccepted > superseded combination)
298. Species Clausilia bilabrata E. A. Smith, 1876 (unaccepted, original combination)
299. Species Clausilia billeti H. Fischer, 1898 (unaccepted, original combination)
300. Species Clausilia binaria Heude, 1887 (unaccepted, original combination)
301. Species Clausilia binotata Rossmässler, 1836 (unaccepted, original combination)
302. Species Clausilia biplicata (Montagu, 1803) (unaccepted > superseded combination)
303. Species Clausilia bipustulata A. Schmidt, 1868 (unaccepted, junior synonym)
304. Species Clausilia birugata Charpentier, 1852 (unaccepted > junior subjective synonym, original name)
305. Species Clausilia bisdelineata Heude, 1885 (unaccepted, original combination)
306. Species Clausilia bitorquata Rossmässler, 1857 (unaccepted, original combination)
307. Species Clausilia blanci E. von Martens, 1876 (unaccepted > superseded combination)
308. Species Clausilia blanda Rossmässler, 1836 (unaccepted, original combination)
309. Species Clausilia blandiana L. Pfeiffer, 1856 (unaccepted, original combination)
310. Species Clausilia boeotica Küster, 1861 (unaccepted, junior synonym)
311. Species Clausilia boettgeriana Paulucci, 1878 (unaccepted, original combination)
312. Species Clausilia bogatensis E. A. Bielz, 1856 (unaccepted > superseded combination, original name)
313. Species Clausilia boissieri Charpentier, 1847 (unaccepted > superseded combination, original name)
314. Species Clausilia bonelli E. von Martens, 1873 (unaccepted > superseded combination)
315. Species Clausilia bonneti A. Letourneux, 1887 (unaccepted, junior synonym)
316. Species Clausilia bonthainensis P. Sarasin & F. Sarasin, 1899 (unaccepted, original combination)
317. Species Clausilia borisi P. Hesse, 1912 (unaccepted, junior synonym)
318. Species Clausilia borneensis L. Pfeiffer, 1855 (unaccepted, original combination)
319. Species Clausilia bosnensis Zelebor, 1868 (unaccepted > misspelling - incorrect subsequent spelling)
320. Species Clausilia bosnica Brancsik, 1897 (unaccepted)
321. Species Clausilia bosniensis Vest, 1867 (unaccepted > superseded combination)
322. Species Clausilia bosniensis Zelebor, 1868 (unaccepted, junior synonym)
323. Species Clausilia bouddah Bavay & Dautzenberg, 1912 (unaccepted, original combination)
324. Species Clausilia bourcieri Küster, 1853 (unaccepted, original combination)
325. Species Clausilia bourdoti Cossmann, 1889 † (unaccepted > superseded combination)
326. Species Clausilia bourguignati Charpentier, 1852 (uncertain > taxon inquirendum)
327. Species Clausilia braunii Rossmässler, 1836 (unaccepted > superseded combination)
328. Species Clausilia brembina Strobel, 1850 (unaccepted > superseded combination, original name)
329. Species Clausilia brevicollis L. Pfeiffer, 1849 (unaccepted, original combination)
330. Species Clausilia breviluna Möllendorff, 1901 (unaccepted, junior synonym)
331. Species Clausilia brevior E. von Martens, 1877 (unaccepted > junior subjective synonym, invalid; not Pfeiffer, 1868)
332. Species Clausilia breviplica Möllendorff, 1886 (unaccepted > superseded rank)
333. Species Clausilia brevis Cantraine, 1835 (uncertain > taxon inquirendum)
334. Species Clausilia brevis K. Miller, 1907 † (uncertain > nomen dubium, invalid; not Cantraine, 1835)
335. Species Clausilia broderseni O. Boettger & Schmacker, 1894 (unaccepted, original combination)
336. Species Clausilia brugnoneana Pini, 1885 (unaccepted > junior subjective synonym)
337. Species Clausilia brunnea Rossmässler, 1839 (unaccepted, original combination)
338. Species Clausilia buccinella Heude, 1887 (unaccepted, original combination)
339. Species Clausilia bulbus W. H. Benson, 1863 (unaccepted, original combination)
340. Species Clausilia bulgarica Küster, 1855 (unaccepted, junior synonym)
341. Species Clausilia bulgariensis L. Pfeiffer, 1848 (unaccepted, original combination)
342. Species Clausilia bulimiformis F. Sandberger, 1858 † (unaccepted > junior objective synonym)
343. Species Clausilia bulimina Gredler, 1892 (unaccepted > superseded combination, basionym)
344. Species Clausilia bulimoides A. Braun, 1843 † (unaccepted > superseded combination)
345. Species Clausilia bulla L. Pfeiffer, 1848 (unaccepted, junior synonym)
346. Species Clausilia burmanica Gude, 1914 (unaccepted, original combination)
347. Species Clausilia buschii Küster, 1844 (unaccepted, original combination)
348. Species Clausilia byzantina Charpentier, 1852 (unaccepted, original combination)
349. Species Clausilia caerulea Deshayes, 1835 (unaccepted, original combination)
350. Species Clausilia calacarae R. A. Philippi, 1844 (unaccepted > superseded combination)
351. Species Clausilia callifera Küster, 1853 (unaccepted, original combination)
352. Species Clausilia callistoma Bavay & Dautzenberg, 1899 (unaccepted, original combination)
353. Species Clausilia callistomella Bavay & Dautzenberg, 1900 (unaccepted, original combination)
354. Species Clausilia callocincta Küster, 1861 (unaccepted, junior synonym)
355. Species Clausilia callosa L. Pfeiffer, 1842 (unaccepted > junior subjective synonym, junior synonym)
356. Species Clausilia calopleura Ancey, 1888 (unaccepted > superseded combination)
357. Species Clausilia caloptyx Pilsbry, 1902 (unaccepted, original combination)
358. Species Clausilia cambojensis L. Pfeiffer, 1861 (unaccepted, original combination)
359. Species Clausilia campanica Michelin, 1832 † (unaccepted > superseded combination)
360. Species Clausilia campylauchen O. Boettger, 1883 (unaccepted, original name)
361. Species Clausilia cana Held, 1836 (unaccepted, orignal combination)
362. Species Clausilia canaliculata L. Pfeiffer, 1850 (uncertain > taxon inquirendum)
363. Species Clausilia canalifera Rossmässler, 1836 (unaccepted, original combination)
364. Species Clausilia cancellata A. Schmidt, 1868 (unaccepted, junior synonym)
365. Species Clausilia candida L. Pfeiffer, 1850 (unaccepted, original combination)
366. Species Clausilia candidescens Rossmässler, 1835 (unaccepted, original combination)
367. Species Clausilia candidilabris Porro, 1841 (unaccepted > junior subjective synonym)
368. Species Clausilia canescens Charpentier, 1852 (unaccepted, original combination)
369. Species Clausilia cantrainei Deshayes, 1851 (unaccepted)
370. Species Clausilia capillacea Rossmässler, 1836 (unaccepted, original combination)
371. Species Clausilia capocestiana L. Pfeiffer, 1866 (unaccepted, junior synonym)
372. Species Clausilia carinthiaca A. Schmidt, 1856 (unaccepted, original combination)
373. Species Clausilia carissima Rossmässler, 1839 (unaccepted, original combination)
374. Species Clausilia carpathia O. Boettger, 1883 (unaccepted, original name)
375. Species Clausilia caryostoma Möllendorff, 1882 (unaccepted, basionym)
376. Species Clausilia castalia J. R. Roth, 1856 (unaccepted, original name)
377. Species Clausilia castanea A. Schmidt, 1868 (unaccepted, junior synonym)
378. Species Clausilia castrensis Mousson, 1859 (unaccepted, original name)
379. Species Clausilia catalonica Fagot, 1884 (uncertain > taxon inquirendum)
380. Species Clausilia cataphracta L. Pfeiffer, 1848 (unaccepted, junior synonym)
381. Species Clausilia cattaroensis Rossmässler, 1835 (unaccepted, original combination)
382. Species Clausilia caucasica A. Schmidt, 1868 (unaccepted, original name)
383. Species Clausilia cazioti Bavay & Dautzenberg, 1909 (unaccepted, original combination)
384. Species Clausilia cecilei L. Pfeiffer, 1847 (unaccepted, incorrect subsequent spelling)
385. Species Clausilia cecillei R. A. Philippi, 1847 (unaccepted > superseded combination)
386. Species Clausilia cecillii L. Pfeiffer, 1847 (unaccepted, original combination)
387. Species Clausilia cedretorum Bourguignat, 1863 (uncertain > taxon inquirendum)
388. Species Clausilia celebensis E. A. Smith, 1896 (unaccepted, original combination)
389. Species Clausilia celsa Gredler, 1892 (unaccepted, original combination)
390. Species Clausilia cerata Rossmässler, 1836 (unaccepted, original combination)
391. Species Clausilia ceresolensis H. Nordsieck, 2013 †
392. Species Clausilia cervicalis Bavay & Dautzenberg, 1909 (unaccepted, original combination)
393. Species Clausilia cetivora Heude, 1882 (unaccepted, original combination and rank)
394. Species Clausilia ceylanica W. H. Benson, 1863 (unaccepted)
395. Species Clausilia chacaensis Lubomirski, 1880 (unaccepted, basionym)
396. Species Clausilia charlotia Risso, 1826 (unaccepted, junior synonym)
397. Species Clausilia charpentieri L. Pfeiffer, 1850 (unaccepted, original combination)
398. Species Clausilia chersonensis L. Pfeiffer, 1841 (unaccepted, junior synonym)
399. Species Clausilia chiemhoaensis Sykes, 1902 (unaccepted)
400. Species Clausilia chinensis L. Pfeiffer, 1849 (uncertain > unassessed)
401. Species Clausilia cholerigena Heude, 1889 (unaccepted, original combination)
402. Species Clausilia chondriformis De Cristofori & Jan, 1832 (uncertain > taxon inquirendum)
403. Species Clausilia circinnata Heude, 1890 (uncertain > taxon inquirendum)
404. Species Clausilia circumdata L. Pfeiffer, 1848 (unaccepted, original combination)
405. Species Clausilia cladoptyx Pilsbry, 1905 (unaccepted, basionym)
406. Species Clausilia clandestina Rossmässler, 1857 (unaccepted, original combination)
407. Species Clausilia clara O. Boettger, 1878 (unaccepted, junior synonym)
408. Species Clausilia clathra L. Pfeiffer, 1868 (unaccepted, junior synonym)
409. Species Clausilia clathrata E. A. Bielz, 1856 (unaccepted, original combination and rank)
410. Species Clausilia clava F. Sandberger, 1875 † (unaccepted > superseded combination)
411. Species Clausilia clavata Rossmässler, 1836 (unaccepted > superseded combination)
412. Species Clausilia claviformis L. Pfeiffer, 1850 (unaccepted, basionym)
413. Species Clausilia clavulus Heude, 1887 (unaccepted, original combination and rank)
414. Species Clausilia coccygea Gredler, 1888 (unaccepted, original combination)
415. Species Clausilia cochinchinensis L. Pfeiffer, 1841 (unaccepted, original combination)
416. Species Clausilia coerulea Rossmässler, 1835 (unaccepted, inaccepted emendation)
417. Species Clausilia cognata O. Boettger, 1877 (uncertain > unassessed)
418. Species Clausilia colbeauiana L. Pfeiffer, 1861 (unaccepted > junior subjective synonym, original name)
419. Species Clausilia colchica L. Pfeiffer, 1857 (unaccepted, junior synonym)
420. Species Clausilia colombeliana Heude, 1882 (unaccepted, junior synonym)
421. Species Clausilia comensis L. Pfeiffer, 1849 (unaccepted, original combination)
422. Species Clausilia commena Retowski, 1889 (unaccepted, junior synonym)
423. Species Clausilia comminuta Heude, 1890 (uncertain > taxon inquirendum)
424. Species Clausilia commutata Rossmässler, 1836 (unaccepted, junior synonym)
425. Species Clausilia compressa L. Pfeiffer, 1850 (unaccepted, original combination)
426. Species Clausilia comta L. Pfeiffer, 1842 (unaccepted, junior synonym)
427. Species Clausilia concilians E. A. Bielz, 1853 (unaccepted, junior synonym)
428. Species Clausilia conemenosi O. Boettger, 1883 (unaccepted, original name)
429. Species Clausilia confinata L. Pfeiffer, 1859 (unaccepted, junior synonym)
430. Species Clausilia conformata L. Pfeiffer, 1853 (unaccepted, junior synonym)
431. Species Clausilia confusa O. Boettger, 1878 (unaccepted, original combination)
432. Species Clausilia conica Anton, 1838 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
433. Species Clausilia conjuncta Küster, 1860 (unaccepted, original combination)
434. Species Clausilia consentanea A. Schmidt, 1868 (unaccepted, original name)
435. Species Clausilia conspersa L. Pfeiffer, 1848 (unaccepted, original combination)
436. Species Clausilia conspurcata Rossmässler, 1836 (unaccepted, original combination)
437. Species Clausilia constellata Heude, 1887 (unaccepted, original combination)
438. Species Clausilia contaminata Rossmässler, 1835 (unaccepted, original combination)
439. Species Clausilia contorta de Boissy, 1848 † (unaccepted > superseded combination)
440. Species Clausilia cookei Preston, 1912 (unaccepted > superseded combination)
441. Species Clausilia corcyrensis Mousson, 1859 (unaccepted, original name)
442. Species Clausilia cornea Philippi, 1846 (unaccepted > superseded combination, basionym)
443. Species Clausilia cornea L. Pfeiffer, 1842 (unaccepted > nomen nudum)
444. Species Clausilia corpulenta L. Pfeiffer, 1848 (unaccepted > superseded combination, basionym)
445. Species Clausilia corpulenta L. Pfeiffer, 1868 (unaccepted > nomen nudum, junior synonym)
446. Species Clausilia corrugata L. Pfeiffer, 1842 (unaccepted, junior synonym)
447. Species Clausilia corticina L. Pfeiffer, 1842 (unaccepted, original combination)
448. Species Clausilia corynodes Held, 1836 (unaccepted > superseded combination)
449. Species Clausilia cossoni A. Letourneux, 1887 (unaccepted)
450. Species Clausilia costata (C. Pfeiffer, 1828) (unaccepted, superseded rank and combination)
451. Species Clausilia costicollis L. Pfeiffer, 1848 (unaccepted, junior synonym)
452. Species Clausilia costulata Brusina, 1866 (unaccepted > junior subjective synonym)
453. Species Clausilia costulata De Cristofori & Jan, 1832 (unaccepted > junior subjective synonym, invalid: junior homonym of Clausilia costulata Lamarck, 1822)
454. Species Clausilia costulata Lamarck, 1822 (unaccepted > junior subjective synonym)
455. Species Clausilia coudeini Bavay & Dautzenberg, 1899 (unaccepted, original combination)
456. Species Clausilia crassicostata L. Pfeiffer, 1856 (unaccepted, original combination)
457. Species Clausilia crassilabris Rossmässler, 1836 (unaccepted, original combination)
458. Species Clausilia crenata F. Sandberger, 1871 † (unaccepted > superseded combination)
459. Species Clausilia crenilabium Pilsbry, 1901 (unaccepted)
460. Species Clausilia crenulata Rossmässler, 1836 (unaccepted > junior homonym, non Clausilia crenulata Risso, 1826)
461. Species Clausilia cretensis Rossmässler, 1836 (unaccepted, original combination)
462. Species Clausilia crispula L. Pfeiffer, 1839 (unaccepted, original name)
463. Species Clausilia cristata Rossmässler, 1836 (unaccepted, junior synonym)
464. Species Clausilia cristatella Küster, 1861 (unaccepted, original combination)
465. Species Clausilia critia E. A. Bielz, 1853 (uncertain > taxon inquirendum)
466. Species Clausilia croatica L. Pfeiffer, 1866 (unaccepted, junior synonym)
467. Species Clausilia crossei Hidalgo, 1869 (unaccepted)
468. Species Clausilia cruciata (S. Studer, 1820)
469. Species Clausilia cruda Rossmässler, 1835 (unaccepted, junior synonym)
470. Species Clausilia cumingiana L. Pfeiffer, 1845 (unaccepted, original combination)
471. Species Clausilia curta Rossmässler, 1836 (unaccepted, original combination)
472. Species Clausilia curta Anton, 1838 (uncertain, invalid; not Rossmässler, 1836)
473. Species Clausilia curzolana Küster, 1861 (unaccepted, junior synonym)
474. Species Clausilia cusmichii Walderdorff, 1864 (unaccepted > junior subjective synonym)
475. Species Clausilia cuspidata Held, 1836 (unaccepted, orignal combination)
476. Species Clausilia cuvieri Delafond & Depéret, 1893 † (unaccepted > superseded combination)
477. Species Clausilia cyclostoma L. Pfeiffer, 1850 (unaccepted, original combination)
478. Species Clausilia cylindrella Heude, 1887 (unaccepted, original combination)
479. Species Clausilia cylindrelliformis Bourguignat, 1855 (unaccepted > superseded combination, original name)
480. Species Clausilia cylindrica L. Pfeiffer, 1846 (unaccepted > superseded combination)
481. Species Clausilia cylindricollis Küster, 1861 (unaccepted, junior synonym)
482. Species Clausilia cymatodes Pilsbry, 1905 (unaccepted, original combination)
483. Species Clausilia dacica L. Pfeiffer, 1848 (unaccepted, original combination)
484. Species Clausilia daemonorum Pilsbry, 1902 (unaccepted, original combination)
485. Species Clausilia dalli Pilsbry, 1902 (unaccepted > superseded combination, basionym)
486. Species Clausilia dalmatina Rossmässler, 1835 (unaccepted, original combination)
487. Species Clausilia dautzenbergi Morlet, 1893 (unaccepted, original combination)
488. Species Clausilia davidiana Bourguignat, 1868 (unaccepted > junior subjective synonym, original name)
489. Species Clausilia dazueri L. Pfeiffer, 1868 (unaccepted > superseded combination, original name)
490. Species Clausilia deburghiae Paulucci, 1878 (unaccepted, basionym)
491. Species Clausilia decapitata Pilsbry, 1902 (unaccepted > superseded combination)
492. Species Clausilia decemplicata Sacco, 1886 † (unaccepted > superseded combination)
493. Species Clausilia decipiens Rossmässler, 1835 (unaccepted, junior synonym)
494. Species Clausilia decisa Rossmässler, 1836 (unaccepted, junior synonym)
495. Species Clausilia decollata Potiez & Michaud, 1838 (unaccepted > junior subjective synonym)
496. Species Clausilia decorata L. Pfeiffer, 1848 (unaccepted, junior synonym)
497. Species Clausilia decurtata Heude, 1885 (unaccepted, original combination)
498. Species Clausilia decussata E. von Martens, 1877 (unaccepted > superseded combination)
499. Species Clausilia deenia Cantraine, 1835 (uncertain > taxon inquirendum)
500. Species Clausilia degenerata Pilsbry, 1905 (unaccepted)
501. Species Clausilia degeneris Preston, 1911 (unaccepted, original combination)
502. Species Clausilia deglupta O. Boettger, 1878 (unaccepted > junior subjective synonym)
503. Species Clausilia dehmi (H. Nordsieck, 2007) † (unaccepted > superseded combination)
504. Species Clausilia delavayana Heude, 1885 (unaccepted, original combination)
505. Species Clausilia delesserti Bourguignat, 1853 (unaccepted > junior subjective synonym, original name)
506. Species Clausilia deltostoma R. T. Lowe, 1831 (unaccepted, basionym)
507. Species Clausilia deltostoma Küster, 1860 (unaccepted, junior synonym)
508. Species Clausilia demangei Bavay & Dautzenberg, 1909 (unaccepted, original combination)
509. Species Clausilia denegabilis Küster, 1847 (unaccepted > junior subjective synonym)
510. Species Clausilia denegabilis L. Pfeiffer, 1848 (unaccepted, junior synonym)
511. Species Clausilia denitculata Reuss, 1861 † (unaccepted > junior homonym, junior secondary homonym of C. denticulata (Olivier, 1801); C. schwageri is a replacement name)
512. Species Clausilia densestriata Rossmässler, 1836 (unaccepted, original combination)
513. Species Clausilia densicostulata F. Sandberger, 1871 † (unaccepted > superseded combination)
514. Species Clausilia denticulata (Olivier, 1801) (unaccepted, superseded generic combination)
515. Species Clausilia depauperata R. T. Lowe, 1863 (unaccepted > superseded combination, basionym)
516. Species Clausilia deperdita Oppenheim, 1890 † (unaccepted > superseded combination)
517. Species Clausilia deplana L. Pfeiffer, 1841 (unaccepted, junior synonym)
518. Species Clausilia derasa Mousson, 1863 (unaccepted > superseded combination)
519. Species Clausilia detersa Rossmässler, 1836 (unaccepted, junior synonym)
520. Species Clausilia dextrogyra Bavay & Dautzenberg, 1909 (unaccepted, original combination)
521. Species Clausilia dextrorsa O. Boettger, 1877 (unaccepted, original combination)
522. Species Clausilia diaconalis Heude, 1889 (unaccepted, original combination and rank)
523. Species Clausilia diaphana Küster, 1861 (unaccepted, junior synonym)
524. Species Clausilia dichroa Bavay & Dautzenberg, 1899 (unaccepted, original combination)
525. Species Clausilia difficilis Retowski, 1889 (unaccepted, original combination)
526. Species Clausilia digamma O. Boettger, 1878 (unaccepted, junior synonym)
527. Species Clausilia digonoptyx O. Boettger, 1877 (unaccepted > superseded combination, basionym)
528. Species Clausilia diminuta L. Pfeiffer, 1846 (unaccepted, original combination)
529. Species Clausilia discolor L. Pfeiffer, 1846 (unaccepted > superseded combination)
530. Species Clausilia disjuncta Mortillet, 1853 (unaccepted, original combination)
531. Species Clausilia distans L. Pfeiffer, 1865 (unaccepted, original combination)
532. Species Clausilia distantilirata G. B. Sowerby II, 1877 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)
533. Species Clausilia distinguenda Rossmässler, 1836 (unaccepted, junior synonym)
534. Species Clausilia distinguenda Möllendorff, 1873 (uncertain > taxon inquirendum, invalid, not Rossmässler, 1836)
535. Species Clausilia divergens Küster, 1876 (unaccepted, junior synonym)
536. Species Clausilia dohrni L. Pfeiffer, 1861 (unaccepted, original combination)
537. Species Clausilia doriae Pini, 1885 (uncertain > taxon inquirendum, original name)
538. Species Clausilia drakakisi Maltzan, 1884 (unaccepted, basionym)
539. Species Clausilia dubia Draparnaud, 1805
540. Species Clausilia dubiosa Clessin, 1882 (unaccepted, basionym)
541. Species Clausilia duboisi Charpentier, 1852 (unaccepted, original combination)
542. Species Clausilia ducalis Kobelt, 1876 (unaccepted > superseded combination, original name)
543. Species Clausilia duella Mabille, 1887 (unaccepted, original combination)
544. Species Clausilia dunkeri L. Pfeiffer, 1850 (unaccepted, basionym)
545. Species Clausilia duporti Bavay & Dautzenberg, 1915 (unaccepted, basionym)
546. Species Clausilia dutaillyana Bourguignat, 1868 (unaccepted > superseded combination, original name)
547. Species Clausilia dystherata Jickeli, 1874 (unaccepted, original combination)
548. Species Clausilia eastlakeana Möllendorff, 1882 (unaccepted, original combination)
549. Species Clausilia eburnea L. Pfeiffer, 1855 (unaccepted, original combination)
550. Species Clausilia echigoensis Pilsbry, 1903 (unaccepted > superseded combination, basionym)
551. Species Clausilia echo Pilsbry, 1909 (unaccepted, original combination)
552. Species Clausilia eckingensis F. Sandberger, 1875 † (unaccepted > superseded combination)
553. Species Clausilia edmondi de Boissy, 1848 † (unaccepted > superseded combination)
554. Species Clausilia egena Küster, 1860 (unaccepted, junior synonym)
555. Species Clausilia ehrenbergii J. R. Roth, 1855 (unaccepted > junior subjective synonym)
556. Species Clausilia eichwaldi Siemaschko, 1847 (unaccepted, junior synonym)
557. Species Clausilia elata Rossmässler, 1836 (unaccepted, original combination)
558. Species Clausilia elatior Ancey, 1885 (uncertain > unassessed, use in recent literature not established by editor)
559. Species Clausilia elegans Cantraine, 1835 (uncertain > taxon inquirendum)
560. Species Clausilia elegans T. Hutton, 1837 (unaccepted > nomen nudum)
561. Species Clausilia elegans L. Pfeiffer, 1839 (unaccepted > junior homonym, not Cantraine, 1835)
562. Species Clausilia elegans E. A. Bielz, 1852 (unaccepted > junior homonym, invalid; not Cantraine, 1835)
563. Species Clausilia elegantula L. Pfeiffer, 1848 (unaccepted, junior synonym)
564. Species Clausilia elisabethae Möllendorff, 1881 (unaccepted, original combination)
565. Species Clausilia elongata Cantraine, 1835 (uncertain > taxon inquirendum)
566. Species Clausilia emersoniana Pilsbry, 1913 (uncertain > taxon inquirendum)
567. Species Clausilia entospira Pilsbry, 1901 (unaccepted, original combination)
568. Species Clausilia epistomium Küster, 1845 (unaccepted, original combination)
569. Species Clausilia equestris Küster, 1860 (unaccepted, junior synonym)
570. Species Clausilia eris L. Pfeiffer, 1866 (unaccepted, original combination)
571. Species Clausilia erivanensis Issel, 1865 (unaccepted, junior synonym)
572. Species Clausilia erjaveci O. Boettger, 1879 (unaccepted > junior subjective synonym)
573. Species Clausilia escheri F. Sandberger, 1875 † (unaccepted > superseded combination)
574. Species Clausilia euholostoma Pilsbry, 1900 (unaccepted, original combination)
575. Species Clausilia eumeces O. Boettger, 1889 (unaccepted > superseded combination)
576. Species Clausilia eupleura Bavay & Dautzenberg, 1899 (unaccepted, original combination)
577. Species Clausilia eurystoma E. von Martens, 1877 (unaccepted > junior subjective synonym)
578. Species Clausilia euzieriana Bourguignat, 1870 (unaccepted, basionym)
579. Species Clausilia evae Sykes, 1896 (unaccepted, original combination)
580. Species Clausilia exarata Rossmässler, 1835 (unaccepted, original combination)
581. Species Clausilia excellens L. Pfeiffer, 1861 (unaccepted)
582. Species Clausilia excurrens E. von Martens, 1864 (unaccepted > superseded combination)
583. Species Clausilia exesa Spix, 1827 (unaccepted)
584. Species Clausilia exilis L. Pfeiffer, 1842 (unaccepted, junior synonym)
585. Species Clausilia exoptata A. Schmidt, 1856 (unaccepted > superseded combination, original name)
586. Species Clausilia expansilabris O. Boettger, 1877 (unaccepted > superseded combination, basionym)
587. Species Clausilia extensa L. Pfeiffer, 1865 (unaccepted, original combination)
588. Species Clausilia faberi O. Boettger & Schmacker, 1894 (unaccepted, original combination)
589. Species Clausilia falcifera Bavay & Dautzenberg, 1899 (unaccepted, original combination)
590. Species Clausilia fallax Rossmässler, 1836 (unaccepted > superseded combination, original combination)
591. Species Clausilia falliciosa Küster, 1855 (unaccepted, junior synonym)
592. Species Clausilia falsani Locard, 1883 † (unaccepted > junior subjective synonym)
593. Species Clausilia familiaris Monterosato, 1892 (unaccepted > junior subjective synonym)
594. Species Clausilia fargesiana Heude, 1885 (unaccepted, original combination)
595. Species Clausilia fargesianella Heude, 1885 (unaccepted, original combination)
596. Species Clausilia fauciata Rossmässler, 1857 (unaccepted > junior subjective synonym, junior synonym)
597. Species Clausilia fausta A. Schmidt, 1868 (unaccepted, junior synonym)
598. Species Clausilia festiva Küster, 1856 (unaccepted > superseded combination, basionym)
599. Species Clausilia filialis E. von Martens, 1903 (unaccepted, original combination)
600. Species Clausilia filippina Heude, 1882 (unaccepted, original combination)
601. Species Clausilia filocostulata Lubomirski, 1880 (unaccepted, original combination)
602. Species Clausilia filograna Rossmässler, 1836 (unaccepted, original combination)
603. Species Clausilia filosa Mousson, 1863 (unaccepted > superseded combination, original combination)
604. Species Clausilia filumna L. Pfeiffer, 1866 (unaccepted, junior synonym)
605. Species Clausilia fimbriata Rossmässler, 1835 (unaccepted > superseded combination, original name)
606. Species Clausilia firmata Mousson, 1856 (unaccepted, supressed senior synonym)
607. Species Clausilia fischeri Michaud, 1862 † (unaccepted > superseded combination)
608. Species Clausilia fistulata Bavay & Dautzenberg, 1909 (unaccepted, original combination)
609. Species Clausilia fitzgeraldae O. Boettger, 1879 (unaccepted, original combination)
610. Species Clausilia flammulata L. Pfeiffer, 1850 (unaccepted, original combination)
611. Species Clausilia flava Küster, 1857 (unaccepted, junior synonym)
612. Species Clausilia flaveola Bavay & Dautzenberg, 1915 (unaccepted, junior synonym)
613. Species Clausilia flavescens Heude, 1884 (unaccepted, junior synonym)
614. Species Clausilia forbesiana L. Pfeiffer, 1846 (unaccepted, original combination)
615. Species Clausilia formosa Rossmässler, 1835 (unaccepted, original combination)
616. Species Clausilia formosa L. Pfeiffer, 1848 (unaccepted, superseded generic combination)
617. Species Clausilia fortunei L. Pfeiffer, 1852 (unaccepted, junior synonym)
618. Species Clausilia foveicollis Charpentier, 1852 (unaccepted, junior synonym)
619. Species Clausilia franciscana Möllendorff, 1885 (unaccepted, original combination)
620. Species Clausilia frater A. Schmidt, 1868 (unaccepted, junior synonym)
621. Species Clausilia fraterminor Gredler, 1892 (unaccepted > superseded combination, basionym)
622. Species Clausilia fraudigera Rossmässler, 1839 (unaccepted, original combination)
623. Species Clausilia frauenfeldi Rossmässler, 1856 (unaccepted, original combination)
624. Species Clausilia freyeri L. Pfeiffer, 1848 (unaccepted, junior synonym)
625. Species Clausilia freyi Bavay & Dautzenberg, 1899 (unaccepted, original combination)
626. Species Clausilia frigida Heude, 1884 (unaccepted, junior synonym)
627. Species Clausilia friniana Heude, 1890 (unaccepted, original combination)
628. Species Clausilia fritillaria Frivaldszky, 1835 (unaccepted > junior subjective synonym, basionym)
629. Species Clausilia frivaldskyana Rossmässler, 1839 (unaccepted, original combination)
630. Species Clausilia fuchsiana Heude, 1885 (unaccepted, original combination)
631. Species Clausilia fulcrata Rossmässler, 1836 (unaccepted, original combination)
632. Species Clausilia fulcrata Paulucci, 1879 (unaccepted, original combination)
633. Species Clausilia fuliginea L. Pfeiffer, 1868 (unaccepted, junior synonym)
634. Species Clausilia fulvella Heude, 1882 (unaccepted, original combination and rank)
635. Species Clausilia funiculum Mousson, 1856 (unaccepted, original combination)
636. Species Clausilia fusangensis Möllendorff, 1882 (unaccepted, junior synonym)
637. Species Clausilia fusca De Betta, 1852 (unaccepted > superseded combination, basionym)
638. Species Clausilia fusiformis W. T. Blanford, 1865 (unaccepted, original combination)
639. Species Clausilia fusorium Mousson, 1876 (unaccepted > junior subjective synonym)
640. Species Clausilia fussiana E. A. Bielz, 1852 (unaccepted, junior synonym)
641. Species Clausilia gaasensis Tournouër, 1882 † (uncertain > taxon inquirendum)
642. Species Clausilia galeata Rossmässler, 1839 (unaccepted, original combination)
643. Species Clausilia gastrolepta Rossmässler, 1836 (unaccepted, original combination)
644. Species Clausilia gaudryi Bourguignat, 1868 (unaccepted > superseded combination, original name)
645. Species Clausilia gebennica Fontannes, 1884 † (unaccepted > superseded combination)
646. Species Clausilia gemina Gredler, 1881 (unaccepted, original combination)
647. Species Clausilia genezerethana Tristram, 1865 (unaccepted > superseded combination, original name)
648. Species Clausilia geophila L. Pfeiffer, 1848 (unaccepted, junior synonym)
649. Species Clausilia gereti Bavay & Dautzenberg, 1900 (unaccepted, junior synonym)
650. Species Clausilia gerlachi Möllendorff, 1881 (unaccepted, original combination)
651. Species Clausilia giardi H. Fischer, 1898 (unaccepted, original combination)
652. Species Clausilia gibbosula Deshayes, 1870 (unaccepted, original combination)
653. Species Clausilia gibbula Rossmässler, 1836 (unaccepted, original combination)
654. Species Clausilia giraudi Bourguignat, 1885 (unaccepted, junior synonym)
655. Species Clausilia gisota Bavay & Dautzenberg, 1899 (unaccepted > superseded combination)
656. Species Clausilia glabella L. Pfeiffer, 1865 (unaccepted, original combination)
657. Species Clausilia glabrata L. Pfeiffer, 1842 (unaccepted, junior synonym)
658. Species Clausilia glabricollis L. Pfeiffer, 1866 (unaccepted, original combination)
659. Species Clausilia glorifica Rossmässler, 1856 (unaccepted, junior synonym)
660. Species Clausilia glorifica Charpentier, 1852 (unaccepted, original combination)
661. Species Clausilia gobanzi L. Pfeiffer, 1868 (unaccepted, junior synonym)
662. Species Clausilia goldfussi O. Boettger, 1883 (unaccepted, original name)
663. Species Clausilia goldi Walderdorff, 1864 (unaccepted, original combination)
664. Species Clausilia gospici L. Pfeiffer, 1866 (unaccepted, junior synonym)
665. Species Clausilia gouldiana L. Pfeiffer, 1857 (unaccepted, original combination)
666. Species Clausilia graciae Pilsbry, 1902 (unaccepted, junior synonym)
667. Species Clausilia gracilicosta Rossmässler, 1836 (unaccepted, original combination)
668. Species Clausilia graciliformis L. Pfeiffer, 1866 (unaccepted, original combination)
669. Species Clausilia gracilior A. Schmidt, 1868 (unaccepted, invalid; not Mousson, 1863)
670. Species Clausilia gracilis C. Pfeiffer, 1821 (unaccepted > junior subjective synonym, original name)
671. Species Clausilia gracilispira Möllendorff, 1882 (unaccepted, original combination)
672. Species Clausilia graeca L. Pfeiffer, 1850 (unaccepted, junior synonym)
673. Species Clausilia grandis Klein, 1846 † (unaccepted > junior homonym, junior homonym of Clausilia similis var. grandis Rossmässler, 1838; Triptychia kleini is a replacement name)
674. Species Clausilia grangeri Bavay & Dautzenberg, 1899 (unaccepted > superseded combination)
675. Species Clausilia granulosa Sykes, 1900 (unaccepted, junior synonym)
676. Species Clausilia gravida Küster, 1860 (unaccepted, original combination)
677. Species Clausilia grayana L. Pfeiffer, 1846 (unaccepted, original combination)
678. Species Clausilia grimmeri L. Pfeiffer, 1848 (unaccepted > superseded rank, basionym)
679. Species Clausilia grisea Deshayes, 1835 (unaccepted, original combination)
680. Species Clausilia grohmanniana Rossmässler, 1836 (unaccepted, original combination)
681. Species Clausilia grossa Rossmässler, 1835 (unaccepted, original combination)
682. Species Clausilia grossa Gistel, 1848 (uncertain > taxon inquirendum)
683. Species Clausilia grossa L. Pfeiffer, 1848 (unaccepted, junior synonym)
684. Species Clausilia guicciardii J. R. Roth, 1856 (unaccepted > superseded combination, original name)
685. Species Clausilia gulo E. A. Bielz, 1859 (unaccepted, original combination)
686. Species Clausilia gustavi O. Boettger, 1880 (unaccepted, original combination)
687. Species Clausilia hakonensis Pilsbry, 1902 (unaccepted, original combination)
688. Species Clausilia hamata O. Boettger, 1888 (unaccepted, original combination)
689. Species Clausilia hamonvillei Bavay & Dautzenberg, 1899 (unaccepted > junior subjective synonym, original combination)
690. Species Clausilia hanleyana L. Pfeiffer, 1850 (unaccepted, junior synonym)
691. Species Clausilia hasta Küster, 1857 (unaccepted, junior synonym)
692. Species Clausilia hebes A. Schmidt, 1868 (unaccepted, junior synonym)
693. Species Clausilia hectica Küster, 1860 (unaccepted, junior synonym)
694. Species Clausilia hedenborgi L. Pfeiffer, 1850 (unaccepted > superseded combination, original name)
695. Species Clausilia hedleyi Pilsbry, 1905 (unaccepted, original combination)
696. Species Clausilia heldii Küster, 1844 (uncertain > taxon inquirendum)
697. Species Clausilia helenae Küster, 1876 (unaccepted, original combination)
698. Species Clausilia helvetica F. Sandberger, 1875 † (unaccepted > junior homonym, junior homonym of Clausilia helvetica Bourguignat, 1862; Triptychia mayeri is a replacement name)
699. Species Clausilia helvola Küster, 1853 (unaccepted, original combination)
700. Species Clausilia hensaniensis Gredler, 1901 (unaccepted, original combination)
701. Species Clausilia hepatica Küster, 1855 (unaccepted, junior synonym)
702. Species Clausilia heracleensis O. Boettger, 1883 (unaccepted, original name)
703. Species Clausilia hereditaria Westerlund, 1898 (uncertain > unassessed)
704. Species Clausilia hetaera L. Pfeiffer, 1848 (unaccepted)
705. Species Clausilia heterochroa Westerlund, 1894 (unaccepted > superseded combination)
706. Species Clausilia heteroptyx Pilsbry, 1902 (unaccepted, invalid; not Boettger, 1883)
707. Species Clausilia heterostropha Risso, 1826 (unaccepted > junior subjective synonym)
708. Species Clausilia heudeana Möllendorff, 1882 (unaccepted, original combination)
709. Species Clausilia hians O. Boettger, 1878 (unaccepted, original name)
710. Species Clausilia hickonis O. Boettger, 1877 (unaccepted, original combination)
711. Species Clausilia hierosolymitana Bourguignat, 1868 (unaccepted, junior synonym)
712. Species Clausilia higoensis Pilsbry, 1901 (unaccepted, junior synonym)
713. Species Clausilia hilgendorfi E. von Martens, 1877 (unaccepted > junior subjective synonym)
714. Species Clausilia hiraseana Pilsbry, 1901 (unaccepted, original combination)
715. Species Clausilia hirasei Pilsbry, 1900 (unaccepted, original combination)
716. Species Clausilia holotrema Pilsbry, 1902 (unaccepted > superseded combination, basionym)
717. Species Clausilia homalorhaphe L. Pfeiffer, 1850 (unaccepted, original combination)
718. Species Clausilia hondana Pilsbry, 1900 (uncertain > unassessed)
719. Species Clausilia honorifica L. Pfeiffer, 1853 (unaccepted, junior synonym)
720. Species Clausilia hosayaka Pilsbry, 1905 (unaccepted, original combination)
721. Species Clausilia houdasi Cossmann, 1889 † (unaccepted > superseded combination)
722. Species Clausilia houssayi H. Fischer, 1898 (unaccepted, junior synonym)
723. Species Clausilia huebneri L. Pfeiffer, 1848 (unaccepted, basionym)
724. Species Clausilia huet Mortillet, 1853 (unaccepted, original combination)
725. Species Clausilia humilis Küster, 1860 (unaccepted, junior synonym)
726. Species Clausilia hunana Gredler, 1881 (unaccepted, unaccepted combination and rank)
727. Species Clausilia hungerfordiana Möllendorff, 1882 (unaccepted, original combination)
728. Species Clausilia hupeana Gredler, 1892 (unaccepted > superseded combination, basionym)
729. Species Clausilia hyperaptyx Pilsbry, 1905 (unaccepted, original combination)
730. Species Clausilia hyperolia E. von Martens, 1877 (unaccepted > junior subjective synonym)
731. Species Clausilia hyperoptyx Pilsbry, 1900 (unaccepted, basionym)
732. Species Clausilia iberica J. R. Roth, 1850 (unaccepted, original name)
733. Species Clausilia idaea L. Pfeiffer, 1850 (unaccepted, original combination)
734. Species Clausilia ikiensis Pilsbry, 1905 (unaccepted, original combination)
735. Species Clausilia imitatrix O. Boettger, 1879 (unaccepted, original name)
736. Species Clausilia impura Küster, 1857 (unaccepted, junior synonym)
737. Species Clausilia inaequalis A. Schmidt, 1868 (unaccepted, original name)
738. Species Clausilia inanis Bavay & Dautzenberg, 1909 (unaccepted, original combination)
739. Species Clausilia incerta Küster, 1861 (unaccepted > superseded combination, original name)
740. Species Clausilia incisa Küster, 1876 (unaccepted, junior synonym)
741. Species Clausilia incommoda O. Boettger, 1878 (unaccepted, junior synonym)
742. Species Clausilia inconstans Mousson, 1859 (unaccepted > superseded combination, original name)
743. Species Clausilia incrustata O. Boettger, 1883 (unaccepted, original name)
744. Species Clausilia index Mousson, 1863 (unaccepted > superseded combination, original name)
745. Species Clausilia indifferens F. Sandberger, 1870 † (unaccepted > superseded combination)
746. Species Clausilia indigena A. Schmidt, 1868 (unaccepted, junior synonym)
747. Species Clausilia indurata Heude, 1887 (unaccepted, original combination)
748. Species Clausilia infantilis Gredler, 1890 (unaccepted, original combination)
749. Species Clausilia infecta Heude, 1887 (unaccepted, junior synonym)
750. Species Clausilia infirma Fagot, 1879 (uncertain > taxon inquirendum)
751. Species Clausilia inopinata Traub, 1938 † (unaccepted > superseded combination)
752. Species Clausilia inserta Porro, 1841 (unaccepted, original combination)
753. Species Clausilia insignis A. Gould, 1843 (unaccepted, original combination)
754. Species Clausilia inspersa Charpentier, 1852 (unaccepted > junior subjective synonym, original name)
755. Species Clausilia insularis Heude, 1882 (unaccepted, original combination and rank)
756. Species Clausilia intercedens A. Schmidt, 1857 (unaccepted > superseded combination, basionym)
757. Species Clausilia interlamellaris E. von Martens, 1876 (unaccepted > superseded combination)
758. Species Clausilia intermedia L. Pfeiffer, 1847 (unaccepted, original combination)
759. Species Clausilia interrupta (C. Pfeiffer, 1828) (unaccepted > superseded combination)
760. Species Clausilia intricata Mousson, 1859 (unaccepted > superseded combination, original name)
761. Species Clausilia intrusa A. Schmidt, 1868 (unaccepted, junior synonym)
762. Species Clausilia inuncta L. Pfeiffer, 1849 (unaccepted, junior synonym)
763. Species Clausilia inversa Heude, 1887 (unaccepted, original combination)
764. Species Clausilia ioes W. H. Benson, 1852 (unaccepted, incorrect subsequent spelling)
765. Species Clausilia ios W. H. Benson, 1852 (unaccepted, basionym)
766. Species Clausilia iotaptyx Pilsbry, 1900 (unaccepted, original combination)
767. Species Clausilia irregularis Rossmässler, 1835 (unaccepted, original combination)
768. Species Clausilia isabellina L. Pfeiffer, 1842 (unaccepted, original combination)
769. Species Clausilia ischna Pilsbry, 1901 (unaccepted, junior synonym)
770. Species Clausilia itala G. von Martens, 1824 (unaccepted > superseded combination)
771. Species Clausilia jacobiana Pilsbry, 1902 (unaccepted > superseded combination, basionym)
772. Species Clausilia janinensis Mousson, 1859 (unaccepted > superseded combination, original name)
773. Species Clausilia janseniana Heude, 1885 (unaccepted, original combination and rank)
774. Species Clausilia japonica Crosse, 1871 (unaccepted > superseded combination, basionym)
775. Species Clausilia javana L. Pfeiffer, 1841 (unaccepted, original combination)
776. Species Clausilia jemjemensis Connolly, 1928 (unaccepted, original combination)
777. Species Clausilia joinvillensis Bourguignat, 1869 † (uncertain > taxon inquirendum)
778. Species Clausilia joncheryensis Deshayes, 1863 † (unaccepted > superseded combination)
779. Species Clausilia jonica L. Pfeiffer, 1866 (unaccepted, original combination)
780. Species Clausilia josephinae O. Boettger, 1880 (unaccepted, basionym)
781. Species Clausilia judaica Bourguignat, 1868 (unaccepted > junior subjective synonym, original name)
782. Species Clausilia jugularis Vest, 1859 (unaccepted > superseded combination, original combination)
783. Species Clausilia julii Gredler, 1887 (unaccepted, junior synonym)
784. Species Clausilia junghuhni Küster, 1844 (unaccepted)
785. Species Clausilia karsteniana Dohrn, 1860 (unaccepted, original combination)
786. Species Clausilia kelantanense Sykes, 1902 (unaccepted, original combination)
787. Species Clausilia kelantanensis Sykes, 1902 (unaccepted, original combination)
788. Species Clausilia kephissiae J. R. Roth, 1855 (unaccepted, original name)
789. Species Clausilia kikaiensis Pilsbry, 1905 (unaccepted, original combination)
790. Species Clausilia klaptoczi Sturany, 1908 (unaccepted, original combination)
791. Species Clausilia kobeltiana Küster, 1876 (unaccepted, original combination)
792. Species Clausilia kobensis E. A. Smith, 1876 (uncertain > taxon inquirendum)
793. Species Clausilia kokeilii L. Pfeiffer, 1848 (unaccepted, junior synonym)
794. Species Clausilia kolenatii Siemaschko, 1847 (unaccepted, junior synonym)
795. Species Clausilia kreglingeri L. Pfeiffer, 1866 (unaccepted, original combination)
796. Species Clausilia krueperi L. Pfeiffer, 1866 (unaccepted, original combination)
797. Species Clausilia kuesteri Rossmässler, 1836 (unaccepted, original combination)
798. Species Clausilia kurozuensis Pilsbry, 1902 (unaccepted, original combination)
799. Species Clausilia kutschigii Küster, 1847 (unaccepted, junior synonym)
800. Species Clausilia kutschigii L. Pfeiffer, 1848 (unaccepted, junior synonym)
801. Species Clausilia kyusyuensis Kuroda, 1945 (unaccepted, junior synonym)
802. Species Clausilia labiata G. B. Sowerby II, 1877 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)
803. Species Clausilia labiocrassa L. Pfeiffer, 1848 (unaccepted, junior synonym)
804. Species Clausilia labrosa Heude, 1887 (unaccepted, junior synonym)
805. Species Clausilia labyrinthoides Sykes, 1898 (unaccepted, original combination)
806. Species Clausilia labyrinthus Anton, 1838 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
807. Species Clausilia lactea Rossmässler, 1839 (unaccepted, junior synonym)
808. Species Clausilia laevicollis Charpentier, 1852 (unaccepted)
809. Species Clausilia laevigata L. Pfeiffer, 1842 (unaccepted, junior synonym)
810. Species Clausilia laevissima Rossmässler, 1833 (unaccepted, original combination)
811. Species Clausilia lamellata Rossmässler, 1836 (unaccepted, original combination)
812. Species Clausilia lamellosa J. A. Wagner, 1829 (unaccepted, original combination)
813. Species Clausilia laminata (Montagu, 1803) (unaccepted > superseded combination)
814. Species Clausilia lamothei Ancey, 1906 (uncertain > unassessed)
815. Species Clausilia lanceolata Benoit, 1882 (unaccepted > junior subjective synonym)
816. Species Clausilia lantenoisi Dautzenberg & H. Fischer, 1906 (unaccepted, original combination)
817. Species Clausilia lanzai Dunker, 1857 (unaccepted, junior synonym)
818. Species Clausilia largillierti R. A. Philippi, 1847 (uncertain > taxon inquirendum)
819. Species Clausilia lartetii Dupuy, 1850 † (unaccepted > superseded combination)
820. Species Clausilia latens L. Pfeiffer, 1853 (unaccepted, junior synonym)
821. Species Clausilia laterradii Grateloup, 1840 (unaccepted, original combination)
822. Species Clausilia latestriata A. Schmidt, 1856 (unaccepted)
823. Species Clausilia latilabris J. A. Wagner, 1829 (unaccepted, original combination)
824. Species Clausilia latilunellaris O. Boettger & Schmacker, 1894 (unaccepted > superseded combination)
825. Species Clausilia laurentiana Möllendorff, 1885 (unaccepted, original combination)
826. Species Clausilia lavillei Dautzenberg & H. Fischer, 1906 (unaccepted, original combination)
827. Species Clausilia laxa Küster, 1860 (unaccepted, original combination)
828. Species Clausilia lederi O. Boettger, 1878 (unaccepted)
829. Species Clausilia lemani Gude, 1914 (unaccepted > superseded combination, basionym)
830. Species Clausilia lemyrei Bavay & Dautzenberg, 1899 (unaccepted, original combination)
831. Species Clausilia lepidospira Heude, 1889 (unaccepted, original combination)
832. Species Clausilia leprevieri Pallary, 1929 (unaccepted, original combination)
833. Species Clausilia lesinacensis L. Pfeiffer, 1841 (unaccepted, junior synonym)
834. Species Clausilia lesinensis Küster, 1847 (unaccepted, original combination)
835. Species Clausilia lessonae Issel, 1865 (unaccepted, original combination)
836. Species Clausilia leucophryna L. Pfeiffer, 1862 (unaccepted, original combination)
837. Species Clausilia leucorhaphe O. Boettger, 1878 (unaccepted, original combination)
838. Species Clausilia leucospira Heude, 1882 (unaccepted, junior synonym)
839. Species Clausilia leucostemma Küster, 1861 (unaccepted, junior synonym)
840. Species Clausilia leucostigma Rossmässler, 1836 (unaccepted, original combination)
841. Species Clausilia leucostoma Küster, 1850 (unaccepted, original combination)
842. Species Clausilia lewisi Ancey, 1887 (uncertain > taxon inquirendum)
843. Species Clausilia liebetruti Charpentier, 1852 (unaccepted > superseded combination, basionym)
844. Species Clausilia ligurica Pini, 1885 (uncertain > taxon inquirendum)
845. Species Clausilia limbata F. Sandberger, 1875 † (unaccepted > superseded combination)
846. Species Clausilia lindholmi Lindholm, 1912 (unaccepted, original combination)
847. Species Clausilia lineolata Held, 1836 (unaccepted, orignal combination)
848. Species Clausilia lischkeana Charpentier, 1852 (unaccepted, original combination)
849. Species Clausilia litotes A. Schmidt, 1868 (unaccepted > superseded combination)
850. Species Clausilia livens E. A. Bielz, 1853 (unaccepted > superseded combination)
851. Species Clausilia livida Menke, 1828 (unaccepted, original name)
852. Species Clausilia llavorsiana Fagot, 1884 (uncertain > taxon inquirendum)
853. Species Clausilia loczyi O. Boettger, 1884 (unaccepted, original combination)
854. Species Clausilia loloensis Heude, 1890 (unaccepted, junior synonym)
855. Species Clausilia longicollis Küster, 1876 (unaccepted, junior synonym)
856. Species Clausilia longiplicata Pilsbry, 1908 (unaccepted, original combination)
857. Species Clausilia longispina Heude, 1885 (unaccepted, original combination)
858. Species Clausilia longurio O. Boettger & Schmacker, 1894 (unaccepted > superseded combination)
859. Species Clausilia lopadusae Calcara, 1846 (unaccepted, original combination)
860. Species Clausilia lopedusae L. Pfeiffer, 1848 (unaccepted > misspelling - incorrect subsequent spelling)
861. Species Clausilia lorraini Menke, 1857 (unaccepted, original combination)
862. Species Clausilia loryi Michaud, 1862 † (unaccepted > superseded combination)
863. Species Clausilia lowei Albers, 1852 (unaccepted, original name)
864. Species Clausilia loxostoma W. H. Benson, 1836 (unaccepted, original combination)
865. Species Clausilia lucida Menke, 1830 (uncertain > unassessed)
866. Species Clausilia lunatica Heude, 1888 (unaccepted, original combination)
867. Species Clausilia lunellaris L. Pfeiffer, 1849 (unaccepted, original combination)
868. Species Clausilia lypra Mabille, 1887 (unaccepted, original combination)
869. Species Clausilia macarana Rossmässler, 1833 (unaccepted, junior synonym)
870. Species Clausilia macascarensis G. B. Sowerby I, 1828 (unaccepted, original combination)
871. Species Clausilia macedonica Rossmässler, 1839 (unaccepted > superseded combination, original combination)
872. Species Clausilia macilenta Rossmässler, 1842 (unaccepted, original combination)
873. Species Clausilia macluriana Risso, 1826 (unaccepted > junior subjective synonym)
874. Species Clausilia macrosoma Cantraine, 1835 (unaccepted, incorrect original spelling (printing error))
875. Species Clausilia macrostoma Cantraine, 1835 (unaccepted, original combination)
876. Species Clausilia macrostoma Küster, 1854 (unaccepted, invalid; not Cantraine, 1835)
877. Species Clausilia maculata Rossmässler, 1836 (unaccepted, basionym)
878. Species Clausilia maculosa Deshayes, 1835 (unaccepted, original combination)
879. Species Clausilia madensis C. Fuss, 1855 (unaccepted > superseded combination)
880. Species Clausilia maesta O. Boettger, 1877 (unaccepted > nomen nudum, new comb. for Helix maesta Férussac, 1821 without description)
881. Species Clausilia magalhaesi Trindade, 1953 † (unaccepted > superseded combination)
882. Species Clausilia magistra G. B. Sowerby III, 1892 (unaccepted, original combination)
883. Species Clausilia magnaciana Heude, 1882 (unaccepted, original combination)
884. Species Clausilia magnacianella Heude, 1882 (unaccepted, junior synonym)
885. Species Clausilia magnifica L. Pfeiffer, 1859 (unaccepted, junior synonym)
886. Species Clausilia magnilabris Zelebor, 1868 (unaccepted, junior synonym)
887. Species Clausilia magniventris Küster, 1853 (unaccepted, junior synonym)
888. Species Clausilia mairei Bavay & Dautzenberg, 1909 (unaccepted, original combination)
889. Species Clausilia makassarensis Sykes, 1897 (unaccepted, original combination)
890. Species Clausilia malleolata R. A. Philippi, 1867 (unaccepted > superseded combination)
891. Species Clausilia mamertina Benoit, 1843 (unaccepted > junior subjective synonym)
892. Species Clausilia manca Wenz, 1919 † (unaccepted > superseded combination)
893. Species Clausilia manselli O. Boettger, 1883 (unaccepted, original combination)
894. Species Clausilia mansuyi Dautzenberg & H. Fischer, 1908 (unaccepted, original combination)
895. Species Clausilia maranhonensis Albers, 1854 (unaccepted, original combination)
896. Species Clausilia marcelia Risso, 1826 (uncertain > nomen dubium)
897. Species Clausilia marchesettii Stossich, 1883 (unaccepted > junior subjective synonym)
898. Species Clausilia marcki L. Pfeiffer, 1868 (unaccepted, original combination)
899. Species Clausilia margaritacea Heude, 1887 (unaccepted, junior synonym)
900. Species Clausilia margaritifera Bavay & Dautzenberg, 1909 (unaccepted, original combination)
901. Species Clausilia marginata Rossmässler, 1835 (unaccepted, original combination)
902. Species Clausilia marginata Held, 1836 (unaccepted, homonym; non Clausilia marginata Rossmässler, 1835)
903. Species Clausilia marisi A. Schmidt, 1868 (unaccepted, original name)
904. Species Clausilia maritima Küster, 1876 (unaccepted, junior synonym)
905. Species Clausilia marteli Dautzenberg, 1915 (unaccepted, original combination)
906. Species Clausilia martensi E. von Martens, 1861 (unaccepted > superseded combination)
907. Species Clausilia masoni Theobald, 1864 (unaccepted > superseded combination)
908. Species Clausilia mastodontofila Sismonda, 1852 † (unaccepted > superseded combination)
909. Species Clausilia mathildae Westerlund, 1878 (unaccepted > superseded combination)
910. Species Clausilia maxima Grateloup, 1828 † (unaccepted > superseded combination)
911. Species Clausilia medlycotti Tristram, 1865 (unaccepted > superseded combination, original name)
912. Species Clausilia meisneriana Shuttleworth, 1843 (unaccepted, original combination)
913. Species Clausilia melvilli Sykes, 1893 (unaccepted, original combination)
914. Species Clausilia menelaus E. von Martens, 1873 (unaccepted, original combination)
915. Species Clausilia meroniana Heude, 1888 (unaccepted, original combination)
916. Species Clausilia meschendorferi E. A. Bielz, 1858 (unaccepted, original combination)
917. Species Clausilia messenica E. von Martens, 1876 (unaccepted > superseded combination)
918. Species Clausilia metria Mabille, 1889 (uncertain > taxon inquirendum)
919. Species Clausilia michahellis Küster, 1850 (unaccepted, original combination)
920. Species Clausilia michaudiana L. Pfeiffer, 1848 (unaccepted, original combination)
921. Species Clausilia michelottii Michaud, 1862 † (unaccepted > superseded combination)
922. Species Clausilia micropeas Möllendorff, 1882 (unaccepted, original combination)
923. Species Clausilia microstoma Küster, 1844 (uncertain > unassessed)
924. Species Clausilia mikado Pilsbry, 1900 (unaccepted > superseded combination, basionym)
925. Species Clausilia mikawa Pilsbry, 1905 (unaccepted, original combination)
926. Species Clausilia milleri L. Pfeiffer, 1850 (unaccepted, original combination)
927. Species Clausilia minahassae P. Sarasin & F. Sarasin, 1899 (unaccepted, original combination)
928. Species Clausilia minima C. Pfeiffer, 1821 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
929. Species Clausilia minor Pirona, 1865 (unaccepted, junior homonym of Clausilia minor Küster, 1850)
930. Species Clausilia minuscula Küster, 1876 (unaccepted, junior synonym)
931. Species Clausilia mirabilis A. Schmidt, 1868 (unaccepted > nomen oblitum, name attributed to Parreyss)
932. Species Clausilia mitylena Albers, 1857 (unaccepted, junior synonym)
933. Species Clausilia modesta Rossmässler, 1836 (unaccepted, junior synonym)
934. Species Clausilia moellendorffi E. von Martens, 1874 (unaccepted > superseded combination)
935. Species Clausilia moellendorffiana Heude, 1882 (unaccepted, original combination)
936. Species Clausilia moesta Rossmässler, 1839 (unaccepted, original combination)
937. Species Clausilia mofellana A. Schmidt, 1868 (unaccepted, junior synonym)
938. Species Clausilia moirati Bavay & Dautzenberg, 1909 (unaccepted, original combination)
939. Species Clausilia molonis De Gregorio, 1880 † (uncertain > taxon inquirendum)
940. Species Clausilia moluccensis E. von Martens, 1864 (unaccepted > superseded combination)
941. Species Clausilia monelasmus Pilsbry, 1900 (unaccepted > superseded combination, basionym)
942. Species Clausilia monilifera L. Pfeiffer, 1866 (unaccepted, junior synonym)
943. Species Clausilia moniziana R. T. Lowe, 1852 (unaccepted > superseded rank)
944. Species Clausilia montana L. Pfeiffer, 1847 (unaccepted > junior subjective synonym, original name)
945. Species Clausilia montenegrina L. Pfeiffer, 1848 (unaccepted, original combination)
946. Species Clausilia moritzii Mousson, 1849 (unaccepted > junior subjective synonym, original name)
947. Species Clausilia moschina Gredler, 1888 (unaccepted, original combination)
948. Species Clausilia mouhoti L. Pfeiffer, 1863 (unaccepted, original combination)
949. Species Clausilia mucida Rossmässler, 1835 (unaccepted, original combination)
950. Species Clausilia multidentata Rossmässler, 1839 (unaccepted, junior synonym)
951. Species Clausilia multilamellata Mousson, 1856 (unaccepted, supressed senior synonym)
952. Species Clausilia munda Rossmässler, 1836 (unaccepted, original combination)
953. Species Clausilia munus Pilsbry, 1901 (unaccepted)
954. Species Clausilia muralis Küster, 1860 (unaccepted, original combination)
955. Species Clausilia muraria A. Schmidt, 1868 (unaccepted, original name)
956. Species Clausilia nagashimana Pilsbry, 1905 (unaccepted, basionym)
957. Species Clausilia nakadae Pilsbry, 1909 (unaccepted > unjustified emendation)
958. Species Clausilia nakadai Pilsbry, 1902 (unaccepted)
959. Species Clausilia nana Küster, 1857 (unaccepted, junior synonym)
960. Species Clausilia nana L. Pfeiffer, 1842 (unaccepted, junior synonym)
961. Species Clausilia nankingensis Heude, 1882 (unaccepted, original combination and rank)
962. Species Clausilia narentana A. Schmidt, 1868 (unaccepted, original combination)
963. Species Clausilia nectarina L. Pfeiffer, 1848 (unaccepted, junior synonym)
964. Species Clausilia negropontina L. Pfeiffer, 1850 (unaccepted, original combination)
965. Species Clausilia neniopsis Pilsbry, 1902 (unaccepted, original combination)
966. Species Clausilia nervosa A. Schmidt, 1868 (unaccepted > junior subjective synonym, original name)
967. Species Clausilia neumeyeri Küster, 1847 (unaccepted, junior synonym)
968. Species Clausilia nevilliana Möllendorff, 1882 (unaccepted, original combination)
969. Species Clausilia nigricans Maton & Rackett, 1807 (unaccepted, junior synonym)
970. Species Clausilia nishinoshimana Pilsbry, 1909 (unaccepted, original combination)
971. Species Clausilia nitida L. Pfeiffer, 1848 (unaccepted, junior synonym)
972. Species Clausilia nitidescens L. Pfeiffer, 1842 (unaccepted, junior synonym)
973. Species Clausilia nitidula L. Pfeiffer, 1848 (unaccepted, junior synonym)
974. Species Clausilia nivea L. Pfeiffer, 1855 (unaccepted, original combination)
975. Species Clausilia nobilis L. Pfeiffer, 1848 (unaccepted, original combination)
976. Species Clausilia nodulifera E. von Martens, 1877 (unaccepted > junior subjective synonym)
977. Species Clausilia nolani Pilsbry, 1900 (uncertain > unassessed)
978. Species Clausilia nomichosi A. Letourneux, 1884 (uncertain > unassessed)
979. Species Clausilia notabilis Küster, 1876 (unaccepted, junior synonym)
980. Species Clausilia novigentiensis Deshayes, 1863 † (uncertain > taxon inquirendum)
981. Species Clausilia numidica A. Letourneux, 1870 (uncertain > unassessed)
982. Species Clausilia nympha Schmidt, 1868 (unaccepted > junior subjective synonym)
983. Species Clausilia obesa E. von Martens, 1867 (unaccepted > superseded combination)
984. Species Clausilia obesa L. Pfeiffer, 1861 (unaccepted, original combination)
985. Species Clausilia obesiuscula R. T. Lowe, 1863 (unaccepted, original combination)
986. Species Clausilia oblita G. B. Sowerby II, 1877 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)
987. Species Clausilia obliterata Hsü, 1936 † (unaccepted > junior subjective synonym)
988. Species Clausilia oblonga Anton, 1838 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
989. Species Clausilia obscura A. Schmidt, 1868 (unaccepted, junior synonym)
990. Species Clausilia obtusa C. Pfeiffer, 1821 (uncertain > taxon inquirendum)
991. Species Clausilia ochracea Küster, 1857 (unaccepted, junior synonym)
992. Species Clausilia odontochila Schmacker & O. Boettger, 1891 (unaccepted > superseded combination)
993. Species Clausilia oertzeni O. Boettger, 1889 (unaccepted, original name)
994. Species Clausilia okinoerabuensis Pilsbry, 1905 (unaccepted, basionym)
995. Species Clausilia oleata Rossmässler, 1842 (unaccepted, junior synonym)
996. Species Clausilia oligocaenica K. Miller, 1907 † (unaccepted > superseded combination)
997. Species Clausilia olivacea Cantraine, 1835 (uncertain > taxon inquirendum)
998. Species Clausilia olivieri J. R. Roth, 1839 (unaccepted, original name)
999. Species Clausilia olympica L. Pfeiffer, 1848 (unaccepted > superseded combination, basionym)
1000. Species Clausilia ominosa Rossmässler, 1835 (unaccepted, junior synonym)

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