1. Species Cyclostrema amabile (Dall, 1889)
2. Species Cyclostrema bibi Espinosa, Ortea & Fernández-Garcés, 2007
3. Species Cyclostrema cancellatum Marryat, 1819
4. Species Cyclostrema carinatum H. Adams, 1873
5. Species Cyclostrema charmophron Melvill, 1906
6. Species Cyclostrema cingulatum (R. A. Philippi, 1852)
7. Species Cyclostrema crassiolatum Strebel, 1908
8. Species Cyclostrema densilaminata Verco, 1907
9. Species Cyclostrema depressispira (Ludbrook, 1941) †
10. Species Cyclostrema dunkeri Tryon, 1888
11. Species Cyclostrema eumares Melvill, 1904
12. Species Cyclostrema exiguum (R. A. Philippi, 1849)
13. Species Cyclostrema filipino S.-I Huang, 2023
14. Species Cyclostrema huesonicum (Dall, 1927)
15. Species Cyclostrema japonicum Sakurai & Habe, 1977
16. Species Cyclostrema martini P. J. Fischer, 1921 †
17. Species Cyclostrema mccullochae A. M. Strong & Hertlein, 1939
18. Species Cyclostrema mcleani (Sohl, 1998) †
19. Species Cyclostrema placens (Melvill & Standen, 1901)
20. Species Cyclostrema pompholyx Dall, 1889
21. Species Cyclostrema prominulum Melvill & Standen, 1903
22. Species Cyclostrema quadricarinatum Melvill & Standen, 1901
23. Species Cyclostrema solariellum Melvill, 1893
24. Species Cyclostrema somedi Ladd, 1982 †
25. Species Cyclostrema spinosa Tenison Woods, 1877
26. Species Cyclostrema stillicidiatum Yokoyama, 1922 †
27. Species Cyclostrema subexcavatum Tryon, 1888
28. Species Cyclostrema torridum Hedley, 1909
29. Species Cyclostrema tortuganum (Dall, 1927)
30. Species Cyclostrema varilirata (Ludbrook, 1941) †
31. Subgenus Cyclostrema (Aorotrema) Schwengel & T. L. McGinty, 1942 accepted as Aorotrema Schwengel & T. L. McGinty, 1942 (original combination)
    1. Species Cyclostrema (Aorotrema) pontogenes Schwengel & T. L. McGinty, 1942 accepted as Aorotrema pontogenes (Schwengel & T. L. McGinty, 1942) (original combination)
32. Subgenus Cyclostrema (Cynisca) H. Adams & A. Adams, 1854 accepted as Cynisca H. Adams & A. Adams, 1854 accepted as Cinysca Kilburn, 1970 (Invalid: junior homonym of Cynisca Gray, 1844; Cinysca Kilburn, 1970 is a replacement name)
    1. Species Cyclostrema (Cynisca) granulata A. Adams, 1854 accepted as Cyclostrema (Cynisca) granulatum A. Adams, 1854 accepted as Cinysca granulata (A. Adams, 1854) (nomen nudum)
    2. Species Cyclostrema (Cynisca) granulatum A. Adams, 1854 accepted as Cinysca granulata (A. Adams, 1854)
33. Subgenus Cyclostrema (Daronia) A. Adams, 1861 accepted as Daronia A. Adams, 1861 (original rank)
    1. Species Cyclostrema (Daronia) cyclotina A. Adams, 1864 accepted as Daronia cyclotina A. Adams, 1864 (basionym)
    2. Species Cyclostrema (Daronia) jaffaensis Verco, 1909 accepted as Eudaronia jaffaensis (Verco, 1909) (basionym)
    3. Species Cyclostrema (Daronia) nitens (I. Lea, 1833) † accepted as Heliconoides nitens (I. Lea, 1833) †
    4. Species Cyclostrema (Daronia) subdisjuncta H. Adams, 1868 accepted as Cyclostrema subdisjunctum H. Adams, 1868 accepted as Tubiola subdisjuncta (H. Adams, 1868) (incorrect grammatical agreement of specific epithet)
    5. Species Cyclostrema (Daronia) subdisjunctum H. Adams, 1868 accepted as Cyclostrema subdisjunctum H. Adams, 1868 accepted as Tubiola subdisjuncta (H. Adams, 1868) (basionym)
34. Subgenus Cyclostrema (Delphinoidea) T. Brown, 1827 accepted as Delphinoidea T. Brown, 1827
    1. Species Cyclostrema (Delphinoidea) prestoni Melvill, 1906 accepted as Srilankaia prestoni (Melvill, 1906) (unaccepted > superseded combination)
    2. Species Cyclostrema (Delphinoidea) subnitidum O. Boettger, 1906 † accepted as Skenea subnitida (O. Boettger, 1906) †
    3. Species Cyclostrema (Delphinoidea) kostejanum O. Boettger, 1902 † (uncertain > unassessed)
35. Subgenus Cyclostrema (Granigyra) Dall, 1889 accepted as Granigyra Dall, 1889
    1. Species Cyclostrema (Granigyra) limatum Dall, 1889 accepted as Granigyra limata (Dall, 1889) (unaccepted > superseded combination)
36. Subgenus Cyclostrema (Lydiphnis) Melvill, 1906 accepted as Circulus Jeffreys, 1865 (unaccepted > junior subjective synonym, original combination)
    1. Species Cyclostrema (Lydiphnis) euchilopteron Melvill, 1903 accepted as Lydiphnis euchilopteron (Melvill & Standen, 1903) accepted as Circulus euchilopteron (Melvill & Standen, 1903)
    2. Species Cyclostrema (Lydiphnis) verreauxii (P. Fischer, 1857) accepted as Cyclostremiscus verreauxii (P. Fischer, 1857)
37. Subgenus Cyclostrema (Microtheca) [sic] accepted as Microthyca A. Adams, 1863 (misspelling)
    1. Species Microtheca acidalia Melvill & Standen, 1899 accepted as Microthyca acidalia Melvill & Standen, 1899 accepted as Pseudoliotia acidalia (Melvill & Standen, 1899) (misspelling of genus)
    2. Species Microtheca laevis Thiele, 1925 accepted as Microthyca laevis Thiele, 1925
38. Subgenus Cyclostrema (Moerchia) A. Adams, 1860 accepted as Moerchia A. Adams, 1860
39. Subgenus Cyclostrema (Tubiola) A. Adams, 1863 accepted as Tubiola A. Adams, 1863
    1. Species Cyclostrema (Tubiola) cornuella (A. Adams, 1860) accepted as Tubiola cornuella (A. Adams, 1860)
    2. Species Cyclostrema (Tubiola) innocens Preston, 1915 accepted as Coliracemata innocens (Preston, 1915) (unaccepted > superseded combination)
    3. Species Cyclostrema (Tubiola) nivea [sic] accepted as Tubiola nivea (Gmelin, 1791) (incorrect gender ending)
    4. Species Cyclostrema (Tubiola) semisculptum E. von Martens, 1904 accepted as Zetela semisculpta (E. von Martens, 1904) (superseded combination)
    5. Species Cyclostrema (Tubiola) subdisjuncta H. Adams, 1868 accepted as Tubiola subdisjuncta (H. Adams, 1868) (unaccepted > superseded combination)
    6. Species Cyclostrema (Tubiola) nugatorium Melvill, 1910 (uncertain > taxon inquirendum)
40. Species Cyclostrema adamsi Bartsch, 1911 accepted as Cyclostremiscus adamsi (Bartsch, 1911) (original combination)
41. Species Cyclostrema affine Jeffreys, 1883 accepted as Anekes affinis (Jeffreys, 1883) (original combination)
42. Species Cyclostrema affine A. E. Verrill, 1884 accepted as Skenea proxima (Tryon, 1888) accepted as Lissospira proxima Tryon, 1888 (unaccepted > junior homonym, non Jeffreys, 1883)
43. Species Cyclostrema alfredense Bartsch, 1915 accepted as Parviturbo alfredensis (Bartsch, 1915)
44. Species Cyclostrema ammonoceras A. Adams, 1863 accepted as Munditiella ammonoceras (A. Adams, 1863) (original combination)
45. Species Cyclostrema anaglyptum A. Adams, 1863 accepted as Pseudoliotia anaglypta (A. Adams, 1863) (original combination)
46. Species Cyclostrema angulata A. Adams, 1850 accepted as Circulus angulatus (A. Adams, 1850) (original combination)
47. Species Cyclostrema annellarium Melvill & Standen, 1903 accepted as Munditiella archeri (Tryon, 1888)
48. Species Cyclostrema annuliferum Dautzenberg, 1910 accepted as Vitrinella annulifera (Dautzenberg, 1910)
49. Species Cyclostrema anxium Hedley, 1909 accepted as Cyclostremiscus anxium [sic] accepted as Cyclostremiscus anxius (Hedley, 1909) (superseded combination)
50. Species Cyclostrema archeri Tryon, 1888 accepted as Munditiella archeri (Tryon, 1888)
51. Species Cyclostrema areolatum G. O. Sars, 1878 accepted as Skenea areolata (G. O. Sars, 1878) (original combination)
52. Species Cyclostrema baldridgei Bartsch, 1911 accepted as Cyclostremiscus baldridgae (Bartsch, 1911) (original combination; incorrect gender ending)
53. Species Cyclostrema bartschi Mansfield, 1930 † accepted as Cyclostremiscus bartschi (Mansfield, 1930) † (unaccepted > superseded combination)
54. Species Cyclostrema basistriatum Jeffreys, 1877 accepted as Skenea basistriata (Jeffreys, 1877) (original combination)
55. Species Cyclostrema bastowi Gatliff, 1906 accepted as Orbitestella bastowi (Gatliff, 1906) (original combination)
56. Species Cyclostrema bicarinata Guppy, 1866 † accepted as Cyclostremiscus beauii (P. Fischer, 1857) accepted as Circulus angulatus (A. Adams, 1850) (unaccepted > junior subjective synonym)
57. Species Cyclostrema biporcatum A. Adams, 1863 accepted as Circulus biporcatus (A. Adams, 1863) (original combination)
58. Species Cyclostrema bithynoides Monterosato, 1880 accepted as Lissomphalia bithynoides (Monterosato, 1880) (original combination)
59. Species Cyclostrema bithynoides Jeffreys, 1883 accepted as Anekes inflata Warén, 1992 accepted as Granigyra inflata (Warén, 1992) (preoccupied by Cyclostrema bythinoides Monterosato, 1890)
60. Species Cyclostrema bruniensis C. E. Beddome, 1883 accepted as Zalipais bruniense (C. E. Beddome, 1885) accepted as Laevilitorina bruniensis (C. E. Beddome, 1883) (original combination)
61. Species Cyclostrema bushae Dautzenberg & H. Fischer, 1907 accepted as Pseudoliotia pulchella (Dunker, 1860)
62. Species Cyclostrema bushi Dautzenberg & H. Fischer, 1907 accepted as Cyclostrema bushae Dautzenberg & H. Fischer, 1907 accepted as Pseudoliotia pulchella (Dunker, 1860) (incorrect gender of genitive (named after a woman))
63. Species Cyclostrema calameli Jousseaume, 1872 accepted as Cyclostremiscus calameli (Jousseaume, 1872) (original combination)
64. Species Cyclostrema calypso Melvill & Standen, 1912 accepted as Brookula calypso (Melvill & Standen, 1912) accepted as Benthobrookula calypso (Melvill & Standen, 1912) (original combination)
65. Species Cyclostrema cancellata Marryat, 1819 accepted as Cyclostrema cancellatum Marryat, 1819 (incorrect grammatical agreement of specific epithet)
66. Species Cyclostrema caperatum Tate, 1899 accepted as Vitrinella caperata (Tate, 1899) (original combination)
67. Species Cyclostrema catenoides Monterosato, 1877 accepted as Skenea catenoides (Monterosato, 1877) (original combination)
68. Species Cyclostrema charopa Tate, 1899 accepted as Microdiscula charopa (Tate, 1889) (original combination)
69. Species Cyclostrema cingulatum Dunker, 1860 accepted as Cyclostrema dunkeri Tryon, 1888 (invalid: secondary junior homonym of Cyclostrema cingulatum (Philippi, 1852); C. dunkeri is a replacement name)
70. Species Cyclostrema cingulatum A. E. Verrill, 1884 accepted as Rugulina verrilli (Tryon, 1888) (unaccepted > junior homonym, invalid: junior homonym of Cyclostrema cingulatum Dunker, 1859; C. verrilli is a replacement name)
71. Species Cyclostrema cinguliferum A. Adams, 1850 accepted as Circulus cinguliferus (A. Adams, 1850) (unaccepted > superseded combination)
72. Species Cyclostrema cistronium Dall, 1889 accepted as Aorotrema cistronium (Dall, 1889) (unaccepted > superseded combination)
73. Species Cyclostrema coatsianum Melvill & Standen, 1912 accepted as Lodderia coatsiana (Melvill & Standen, 1912) (original combination)
74. Species Cyclostrema conicum R. B. Watson, 1886 accepted as Benthobrookula conica (R. B. Watson, 1880) (unaccepted > superseded combination)
75. Species Cyclostrema conspicuum Monterosato, 1880 accepted as Akritogyra conspicua (Monterosato, 1880) (original combination)
76. Species Cyclostrema cookeanum (Dall, 1918) accepted as Macrarene cookeana (Dall, 1918)
77. Species Cyclostrema cornuspira Chapman & Crespin, 1928 † accepted as Microdiscula cornuspira (Chapman & Crespin, 1928) †
78. Species Cyclostrema crassicostatum Strebel, 1908 accepted as Liotella crassicostata (Strebel, 1908) (original combination)
79. Species Cyclostrema crebresculptum Tate, 1899 accepted as Brookula crebresculpta (Tate, 1899) (original combination)
80. Species Cyclostrema cristata G. B. Sowerby III, 1900 accepted as Pseudoliotia cristata (G. B. Sowerby III, 1900)
81. Species Cyclostrema cubitale Hedley, 1907 accepted as Cirsonella cubitalis (Hedley, 1907) (superseded combination)
82. Species Cyclostrema dalli A. E. Verrill, 1882 accepted as Lissospira dalli (A. E. Verrill, 1882) (original combination)
83. Species Cyclostrema dautzenbergianum Ancey, 1898 accepted as Skeneoides exilissima (R. A. Philippi, 1844) (junior synonym)
84. Species Cyclostrema decussatum Pelseneer, 1903 accepted as Brookula decussata (Pelseneer, 1903) (original combination)
85. Species Cyclostrema delectabile Tate, 1899 accepted as Circulus delectabilis (Tate, 1899) (original combination)
86. Species Cyclostrema denselaminatum Verco, 1907 accepted as Cyclostrema densilaminata Verco, 1907 (invalid: incorrect gender of species epithet)
87. Species Cyclostrema depressum Monterosato, 1880 accepted as Dikoleps depressa (Monterosato, 1880) (original combination)
88. Species Cyclostrema diaphanum A. E. Verrill, 1884 accepted as Skenea diaphana (A. E. Verrill, 1884) (original combination)
89. Species Cyclostrema diegensis Bartsch, 1907 accepted as Orbitestella diegensis (Bartsch, 1907) (original combination)
90. Species Cyclostrema duplicatum Lischke, 1872 accepted as Circulus duplicatus (Lischke, 1872) (original combination)
91. Species Cyclostrema elegans A. Adams, 1850 accepted as Adeorbis elegans (A. Adams, 1850) (original combination)
92. Species Cyclostrema euchilopteron Melvill & Standen, 1903 accepted as Circulus euchilopteron (Melvill & Standen, 1903) (unaccepted > superseded combination)
93. Species Cyclostrema eumorpha Suter, 1908 accepted as Lodderia eumorpha (Suter, 1908) accepted as Parviturbo eumorpha (Suter, 1908)
94. Species Cyclostrema eupoietum Melvill, 1904 accepted as Leucorhynchia eupoietum (Melvill, 1904) (unaccepted > superseded combination)
95. Species Cyclostrema fenestratum Chaster, 1896 accepted as Parviturbo fenestratus (Chaster, 1896) (original combination)
96. Species Cyclostrema fluctuata F. W. Hutton, 1883 accepted as Argalista fluctuata (F. W. Hutton, 1883) (superseded combination)
97. Species Cyclostrema fluctuatum F. W. Hutton, 1883 accepted as Argalista fluctuata (F. W. Hutton, 1883) (superseded combination with corrected gender ending)
98. Species Cyclostrema funnazzense De Gregorio, 1889 accepted as Cirsonella romettensis (Granata Grillo, 1877)
99. Species Cyclostrema fuscopiperata W. H. Turton, 1932 accepted as Peasiella fuscopiperata (W. H. Turton, 1932)
100. Species Cyclostrema gaudens Melvill & Standen, 1912 accepted as Munditia gaudens (Melvill & Standen, 1912) (unaccepted > superseded combination)
101. Species Cyclostrema godeti Dautzenberg & H. Fischer, 1907 accepted as Pseudoliotia godeti (Dautzenberg & H. Fischer, 1907) (original combination)
102. Species Cyclostrema gordana Hertlein & A. M. Strong, 1951 accepted as Cyclostremiscus gordanus (Hertlein & A. M. Strong, 1951)
103. Species Cyclostrema granulatum A. Adams, 1854 accepted as Cinysca granulata (A. Adams, 1854) (nomen nudum)
104. Species Cyclostrema granulum Dall, 1889 accepted as Parviturbo granulum (Dall, 1889) (unaccepted > superseded combination)
105. Species Cyclostrema gravieri E. Lamy, 1909 accepted as Ethminolia gravieri (E. Lamy, 1909)
106. Species Cyclostrema gyalum Melvill, 1904 accepted as Circulus gyalum (Melvill, 1904) (unaccepted > superseded combination)
107. Species Cyclostrema harriettae Petterd, 1884 accepted as Circulus harriettae (Petterd, 1884) (original combination)
108. Species Cyclostrema helicoides F. W. Hutton, 1877 † accepted as Circulus helicoides (F. W. Hutton, 1877) † (superseded combination)
109. Species Cyclostrema henjamense Melvill & Standen, 1903 accepted as Pseudoliotia henjamensis (Melvill & Standen, 1903) (unaccepted > superseded combination)
110. Species Cyclostrema homalon Verco, 1907 accepted as Circulus harriettae (Petterd, 1884)
111. Species Cyclostrema humile Pelseneer, 1903 accepted as Lissotesta humilis (Pelseneer, 1903) (original combination)
112. Species Cyclostrema iheringi Dautzenberg & H. Fischer, 1897 accepted as Retigyra iheringi (Dautzenberg & H. Fischer, 1897) (original combination)
113. Species Cyclostrema immaculata Tenison Woods, 1877 accepted as Munditia subquadrata (Tenison Woods, 1879) (unaccepted > junior subjective synonym)
114. Species Cyclostrema inconspicua W. H. Turton, 1932 accepted as Homalopoma rotundatum (G. B. Sowerby III, 1892) accepted as Microcollonia rotundata (G. B. Sowerby III, 1892)
115. Species Cyclostrema inscripta Tate, 1899 accepted as Zalipais inscripta (Tate, 1899) (original combination)
116. Species Cyclostrema interruptum (C. B. Adams, 1850) accepted as Parviturboides interruptus (C. B. Adams, 1850) (unaccepted > superseded combination)
117. Species Cyclostrema jaffaensis Verco, 1909 accepted as Eudaronia jaffaensis (Verco, 1909) (original combination)
118. Species Cyclostrema johnstoni C. E. Beddome, 1883 accepted as Chunula johnstoni (C. E. Beddome, 1883) accepted as Liotella johnstoni (C. E. Beddome, 1883) (original combination)
119. Species Cyclostrema josephi Tenison Woods, 1877 accepted as Charisma josephi (Tenison Woods, 1877) (original combination)
120. Species Cyclostrema kilcundae Gatliff & Gabriel, 1914 accepted as Liotella kilcundae (Gatliff & Gabriel, 1914) (original combination)
121. Species Cyclostrema lacteum Jousseaume, 1872 accepted as Circulus laevis (Kiener, 1838) (unaccepted > junior subjective synonym)
122. Species Cyclostrema laeve (Kiener, 1838) accepted as Pygmaeorota laevis (Kiener, 1838) accepted as Circulus laevis (Kiener, 1838)
123. Species Cyclostrema laevis [sic] (Kiener, 1838) accepted as Circulus laevis (Kiener, 1838) (incorrect gender ending)
124. Species Cyclostrema lamellata Yokoyama, 1927 accepted as Metalycaeus nipponensis (Reinhardt, 1877) (junior synonym)
125. Species Cyclostrema lamyi Fischer-Piette & Nicklès, 1946 accepted as Vitrinella annulifera (Dautzenberg, 1910)
126. Species Cyclostrema liratulum Pelseneer, 1903 accepted as Lissotesta liratula (Pelseneer, 1903) (original combination)
127. Species Cyclostrema lissum Suter, 1908 accepted as Zalipais lissa (Suter, 1908) (original combination)
128. Species Cyclostrema lowei F. Baker, G. D. Hanna & A. M. Strong, 1938 accepted as Cyclostremiscus lowei (F. Baker, G. D. Hanna & A. M. Strong, 1938)
129. Species Cyclostrema marchei Jousseaume, 1872 accepted as Circulus marchei (Jousseaume, 1872)
130. Species Cyclostrema mariae F. Baker, G. D. Hanna & A. M. Strong, 1938 accepted as Lydiphnis mariae (F. Baker, G. D. Hanna & A. M. Strong, 1938)
131. Species Cyclostrema mayii Tate, 1899 accepted as Microcarina mayii (Tate, 1899) (original combination)
132. Species Cyclostrema megalomphalus Cossmann, 1919 † accepted as Circulus megalomphalus (Cossmann, 1919) † (original combination)
133. Species Cyclostrema meridionale Melvill & Standen, 1912 accepted as Munditia meridionalis (Melvill & Standen, 1912) (unaccepted > superseded combination)
134. Species Cyclostrema messanensis G. Seguenza, 1876 (unaccepted > superseded combination)
135. Species Cyclostrema micans A. Adams, 1850 (unaccepted, original combination)
136. Species Cyclostrema micra Petterd, 1884 (unaccepted, invalid: junior homonym of Cyclostrema micra Tenison-Woods, 1877; C. charopa is a replacement name)
137. Species Cyclostrema micra Tenison Woods, 1877 (unaccepted, original combination)
138. Species Cyclostrema microscopicum Gatliff & Gabriel, 1910 (unaccepted, original combination)
139. Species Cyclostrema militare Jousseaume, 1872 (unaccepted > superseded combination)
140. Species Cyclostrema millipunctatum Friele, 1886 (unaccepted, original combination)
141. Species Cyclostrema minutum Jeffreys, 1883 (unaccepted)
142. Species Cyclostrema mirandum Bartsch, 1918 (unaccepted, dubious synonym)
143. Species Cyclostrema modestum A. Gould, 1859 (unaccepted, original combination)
144. Species Cyclostrema monterosatoi Ancey, 1898 (unaccepted)
145. Species Cyclostrema nitens (R. A. Philippi, 1844) (unaccepted > superseded combination)
146. Species Cyclostrema nitidum A. Adams, 1850 (unaccepted > superseded combination)
147. Species Cyclostrema nivea [sic] (unaccepted, incorrect gender ending)
148. Species Cyclostrema normani Dautzenberg & H. Fischer, 1897 (unaccepted, original combination)
149. Species Cyclostrema novemcarinatum Melvill, 1906 (unaccepted > superseded combination)
150. Species Cyclostrema obliquata F. W. Hutton, 1885 † (unaccepted, junior subjective synonym)
151. Species Cyclostrema obsoleta Cossmann, 1888 † (unaccepted > superseded combination)
152. Species Cyclostrema ocrinium Melvill & Standen, 1901 (unaccepted, original combination)
153. Species Cyclostrema octoliratum P. P. Carpenter, 1856 (unaccepted, original combination)
154. Species Cyclostrema pachyston Verco, 1907 (unaccepted, original combination)
155. Species Cyclostrema pellucida E. A. Smith, 1910 (unaccepted, original combination)
156. Species Cyclostrema pentagona Gabb, 1873 † (unaccepted > superseded combination)
157. Species Cyclostrema pentegoniostoma P. P. Carpenter, 1856 (unaccepted > superseded combination)
158. Species Cyclostrema peterseni Friele, 1877 (unaccepted, original combination)
159. Species Cyclostrema plana A. Adams, 1850 (unaccepted > superseded combination)
160. Species Cyclostrema planorbulum A. Adams, 1850 (unaccepted > superseded combination)
161. Species Cyclostrema planulata G. B. Sowerby III, 1892 (unaccepted, original combination)
162. Species Cyclostrema ponsonbyi Dautzenberg & H. Fischer, 1897 (unaccepted, original combination)
163. Species Cyclostrema pontogenes Schwengel & T. L. McGinty, 1942 (unaccepted, unaccepted combination)
164. Species Cyclostrema porcellana Tate & May, 1900 (unaccepted, original combination)
165. Species Cyclostrema prestoni Melvill, 1906 (unaccepted)
166. Species Cyclostrema profundum Friele, 1879 (unaccepted, original combination)
167. Species Cyclostrema proximum Tryon, 1888 (unaccepted)
168. Species Cyclostrema pruinosum Chaster, 1896 (unaccepted, original combination)
169. Species Cyclostrema pulchellum Dunker, 1860 (unaccepted, original combination)
170. Species Cyclostrema quinquecarinatum Melvill, 1906 (unaccepted > superseded combination)
171. Species Cyclostrema richardi Dautzenberg & H. Fischer, 1896 (unaccepted, original combination)
172. Species Cyclostrema roseotincta E. A. Smith, 1872 (unaccepted)
173. Species Cyclostrema roseotincta W. H. Turton, 1932 (unaccepted > junior homonym, junior primary homonym of Cyclostrema roseotincta E. A. Smith, 1872; Cyclostrema tomlini W. H. Turton, 1933 is a replacement name)
174. Species Cyclostrema rotundata G. B. Sowerby III, 1892 (unaccepted > superseded combination, original combination)
175. Species Cyclostrema rugulosum G. O. Sars, 1878 (unaccepted > superseded combination)
176. Species Cyclostrema sanibelense Pilsbry, 1939 (unaccepted > junior subjective synonym)
177. Species Cyclostrema schrammi [sic] (unaccepted > misspelling - incorrect subsequent spelling)
178. Species Cyclostrema schrammii P. Fischer, 1857 (unaccepted > superseded combination)
179. Species Cyclostrema sculptile (Garrett, 1873) (unaccepted > superseded combination)
180. Species Cyclostrema semisculptum E. von Martens, 1904 (unaccepted, superseded combination)
181. Species Cyclostrema simile Jeffreys, 1883 (unaccepted, original combination)
182. Species Cyclostrema solutum di Geronimo, 1974 (unaccepted)
183. Species Cyclostrema sphaeroidea S. V. Wood, 1842 † (unaccepted > superseded combination)
184. Species Cyclostrema spiceri F. Baker, G. D. Hanna & A. M. Strong, 1938 (unaccepted)
185. Species Cyclostrema spirula A. Adams, 1850 (unaccepted > superseded combination)
186. Species Cyclostrema striolatum G. O. Sars, 1878 (unaccepted > junior subjective synonym)
187. Species Cyclostrema subalveolatum Fekih & Gougerot, 1977 (unaccepted)
188. Species Cyclostrema subdisjuncta H. Adams, 1868 (unaccepted, incorrect grammatical agreement of specific epithet)
189. Species Cyclostrema subdisjunctum H. Adams, 1868 (unaccepted, original combination)
190. Species Cyclostrema subtatei Suter, 1907 (unaccepted, superseded combination)
191. Species Cyclostrema sulcatum A. Adams, 1850 (unaccepted, original combination)
192. Species Cyclostrema sulcatum R. B. Watson, 1886 (unaccepted, invalid: junior homonym of Cyclostrema sulcatum A. Adams, 1850; C. watsoni is a replacement name)
193. Species Cyclostrema supremum Melvill & Standen, 1903 (unaccepted > superseded combination)
194. Species Cyclostrema susonis Tenison Woods, 1877 (unaccepted, junior subjective synonym)
195. Species Cyclostrema tatei Angas, 1879 (unaccepted, original combination)
196. Species Cyclostrema tenerum Jeffreys, 1883 (unaccepted, original combination)
197. Species Cyclostrema thomasi Pilsbry, 1945 (unaccepted, Invalid: secondary junior homonym of Vitrinella thomasi Bartsch, 1918; Vitrinella solaris is a replacement name)
198. Species Cyclostrema tornatum A. Adams, 1864 (unaccepted > superseded combination)
199. Species Cyclostrema tricarinata E. A. Smith, 1872 (unaccepted, Invalid: junior secondary homonym of Adeorbis tricarinatus S.V. Wood, 1852; Circulus smithi is a replacement name )
200. Species Cyclostrema trochoides Friele, 1876 (unaccepted, original combination)
201. Species Cyclostrema turbinum Dall, 1889 (unaccepted, original combination)
202. Species Cyclostrema turgidum Odhner, 1912 (unaccepted, original combination)
203. Species Cyclostrema turritum Gaglini, 1987 (unaccepted, original combination)
204. Species Cyclostrema umbilicostriatum Gaglini, 1987 (unaccepted, original combination)
205. Species Cyclostrema valvatoides Jeffreys, 1883 (unaccepted, original combination)
206. Species Cyclostrema veleronis A. M. Strong & Hertlein, 1947 (unaccepted, original combination)
207. Species Cyclostrema vercoi Gatliff & Gabriel, 1914 (unaccepted, original combination)
208. Species Cyclostrema verrilli Tryon, 1888 (unaccepted, original combination)
209. Species Cyclostrema virginiae Jousseaume, 1872 (unaccepted, original combination)
210. Species Cyclostrema watsoni Tryon, 1888 (unaccepted > superseded combination)
211. Species Cyclostrema weldii Tenison Woods, 1877 (unaccepted, superseded combination)
212. Species Cyclostrema willei Friele, 1886 (unaccepted)
213. Species Cyclostrema xantusi Bartsch, 1907 (unaccepted > superseded combination)
214. Species Cyclostrema zacalles Mazÿck, 1913 (unaccepted > junior subjective synonym)
215. Species Cyclostrema aenigmatica W. H. Turton, 1932 (uncertain > taxon inquirendum)
216. Species Cyclostrema alternans Ryckholt, 1860 † (uncertain > taxon inquirendum)
217. Species Cyclostrema alveolatum Jousseaume, 1872 (uncertain > taxon inquirendum)
218. Species Cyclostrema biconcava Ryckholt, 1860 † (uncertain > taxon inquirendum)
219. Species Cyclostrema captiva Ryckholt, 1860 † (uncertain > taxon inquirendum)
220. Species Cyclostrema carbonnieri Jousseaume, 1881 (uncertain > taxon inquirendum)
221. Species Cyclostrema contabulatum Tate, 1899 (uncertain > taxon inquirendum)
222. Species Cyclostrema decurrens Ryckholt, 1860 † (uncertain > taxon inquirendum)
223. Species Cyclostrema dispar G. B. Sowerby III, 1900 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)
224. Species Cyclostrema dollfusi Dautzenberg & H. Fischer, 1896 (uncertain > unassessed)
225. Species Cyclostrema eburnea G. Nevill & H. Nevill, 1875 (uncertain > taxon inquirendum)
226. Species Cyclostrema euchilopteronoides Schepman, 1913 (uncertain > taxon inquirendum, status in recent literature not researched by editor)
227. Species Cyclostrema excavata P. P. Carpenter, 1856 (uncertain > taxon inquirendum)
228. Species Cyclostrema fraenata Ryckholt, 1860 † (uncertain > taxon inquirendum)
229. Species Cyclostrema fuscopicta W. H. Turton, 1932 (uncertain > taxon inquirendum)
230. Species Cyclostrema inflata G. B. Sowerby III, 1892 (uncertain > taxon inquirendum)
231. Species Cyclostrema minuscula W. H. Turton, 1932 (uncertain > taxon inquirendum)
232. Species Cyclostrema nevilli H. Adams, 1868 (uncertain > unassessed)
233. Species Cyclostrema philippii Issel, 1869 (uncertain > taxon inquirendum)
234. Species Cyclostrema problematica W. H. Turton, 1932 (uncertain > taxon inquirendum)
235. Species Cyclostrema profuga Ryckholt, 1860 † (uncertain > taxon inquirendum)
236. Species Cyclostrema quinquestriatum Melvill, 1912 (uncertain > unassessed, use in recent literature not established by editor)
237. Species Cyclostrema semisulcatum Issel, 1869 (uncertain > taxon inquirendum)
238. Species Cyclostrema smithi Dautzenberg & H. Fischer, 1897 (uncertain > taxon inquirendum)
239. Species Cyclostrema spiculigerum Melvill, 1912 (uncertain > unassessed, use in recent literature not established by editor)
240. Species Cyclostrema striata Gabb, 1873 † (uncertain > unassessed)
241. Species Cyclostrema supraplana Ryckholt, 1860 † (uncertain > taxon inquirendum)
242. Species Cyclostrema sykesi Dautzenberg & H. Fischer, 1897 (uncertain > taxon inquirendum)
243. Species Cyclostrema tomlini W. H. Turton, 1833 (uncertain > taxon inquirendum)
244. Species Cyclostrema tredecimlineatum Melvill, 1910 (uncertain > unassessed)

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