1. Species Periploma acutum Anelli, Rocha-Campus, dos Santos, Perinotto & Quaglio, 2006 †
2. Species Periploma aleuticum (A. Krause, 1885)
3. Species Periploma andamanicum (E. A. Smith, 1904)
4. Species Periploma beibuwanense F.-S. Xu, 1999
5. Species Periploma besshoense (Yokayama, 1924) †
6. Species Periploma camerunense Cosel, 1995
7. Species Periploma carpenteri Dall, 1896
8. Species Periploma colombianum (A. d'Orbigny, 1842) †
9. Species Periploma compressum A. d'Orbigny, 1846
10. Species Periploma coquettae van Regteren Altena, 1968
11. Species Periploma discus Stearns, 1890
12. Species Periploma fracturum Boshoff, 1968
13. Species Periploma fragile (Totten, 1835)
14. Species Periploma hendrickxi Valentich-Scott & Coan, 2010
15. Species Periploma indicum Melvill, 1898
16. Species Periploma inequale (C. B. Adams, 1842)
17. Species Periploma kaiserae Valentich-Scott & Coan, 2010
18. Species Periploma lagartillum Olsson, 1961
19. Species Periploma lenticulare G. B. Sowerby I, 1834
20. Species Periploma macphersoni Marwick, 1931 †
21. Species Periploma margaritaceum (Lamarck, 1801)
22. Species Periploma mitsuganoense Araki, 1959 †
23. Species Periploma multigranosum F.-S. Xu, 1999
24. Species Periploma nanshaense F.-S. Xu, 1999
25. Species Periploma orbiculare Guppy, 1882
26. Species Periploma ovatum A. d'Orbigny, 1846
27. Species Periploma owasense Suzuki, 1934 †
28. Species Periploma papyratium (Say, 1822)
29. Species Periploma planiusculum G. B. Sowerby I, 1834
30. Species Periploma rosewateri F. R. Bernard, 1989
31. Species Periploma sanctamarthaense Ardila & Diaz, 1998
32. Species Periploma skoglundae Valentich-Scott & Coan, 2010
33. Species Periploma stearnsii Dall, 1896
34. Species Periploma subfragile Scarlato & Kafanov, 1988
35. Species Periploma teevani Hertlein & A. M. Strong, 1946
36. Species Periploma vivarirex Stilwell, 2005 †
37. Subgenus Periploma (Albimanus) Pilsbry & Olsson, 1935 accepted as Albimanus Pilsbry & Olsson, 1935 (original combination)
    1. Species Periploma (Albimanus) pentadactylus Pilsbry & Olsson, 1935 accepted as Albimanus pentadactylus (Pilsbry & Olsson, 1935) (original combination)
38. Subgenus Periploma (Aperiploma) T. Habe, 1952 accepted as Cochlodesma Couthouy, 1839 (unaccepted > junior subjective synonym)
    1. Species Periploma (Aperiploma) otohimeae T. Habe, 1952 accepted as Pendaloma otohimeae (T. Habe, 1952) (unaccepted > superseded combination)
39. Subgenus Periploma (Cochlodesma) Couthouy, 1839 accepted as Cochlodesma Couthouy, 1839 (unaccepted > superseded rank)
    1. Species Periploma (Cochlodesma) antiqua (Conrad, 1834) † accepted as Cochlodesma antiqua (Conrad, 1834) † (unaccepted > superseded combination)
40. Species Periploma abyssorum A. E. Verrill, 1893 accepted as Periploma aleuticum (A. Krause, 1885)
41. Species Periploma acuta Anelli, Rocha-Campus, dos Santos, Perinotto & Quaglio, 2006 † accepted as Periploma acutum Anelli, Rocha-Campus, dos Santos, Perinotto & Quaglio, 2006 † (unaccepted > incorrect grammatical agreement of specific epithet)
42. Species Periploma affine A. E. Verrill & K. J. Bush, 1898 accepted as Cochlodesma affine (A. E. Verrill & K. J. Bush, 1898) (unaccepted > superseded combination)
43. Species Periploma affinis A. E. Verrill & K. J. Bush, 1898 accepted as Cochlodesma affine (A. E. Verrill & K. J. Bush, 1898) (unaccepted > incorrect grammatical agreement of specific epithet)
44. Species Periploma alaskana M. W. Williams, 1940 accepted as Periploma aleuticum (A. Krause, 1885)
45. Species Periploma andamanica (E. A. Smith, 1904) accepted as Periploma andamanicum (E. A. Smith, 1904) (incorrect gender ending)
46. Species Periploma angasi Crosse & P. Fischer, 1864 accepted as Offadesma angasi (Crosse & P. Fischer, 1864) (superseded combination)
47. Species Periploma anguliferum R. A. Philippi, 1847 accepted as Periploma inequale (C. B. Adams, 1842) (unaccepted > junior subjective synonym)
48. Species Periploma argentaria Conrad, 1837 accepted as Periploma planiusculum G. B. Sowerby I, 1834
49. Species Periploma camerunensis Cosel, 1995 accepted as Periploma camerunense Cosel, 1995 (wrong grammatical agreement of species name)
50. Species Periploma coseli Ardila & Diaz, 1998 accepted as Periploma orbiculare Guppy, 1882
51. Species Periploma discus Stearns, 1890, sensu Nicklès, 1955 accepted as Periploma camerunense Cosel, 1995 (misapplication)
52. Species Periploma fractura Boshoff, 1968 accepted as Periploma fracturum Boshoff, 1968 (incorrect grammatical agreement of specific epithet)
53. Species Periploma fragilis Scarlato, 1981 accepted as Periploma aleuticum (A. Krause, 1885)
54. Species Periploma inaequivalve Schumacher, 1817 accepted as Periploma margaritaceum (Lamarck, 1801)
55. Species Periploma inaequivalvis Schumacher, 1817 accepted as Periploma margaritaceum (Lamarck, 1801) (unaccepted > junior subjective synonym)
56. Species Periploma inequivalvis [sic] accepted as Periploma inaequivalvis Schumacher, 1817 accepted as Periploma margaritaceum (Lamarck, 1801) (unaccepted > misspelling - incorrect subsequent spelling)
57. Species Periploma japonica F. R. Bernard, 1989 accepted as Pendaloma otohimeae (T. Habe, 1952)
58. Species Periploma largillarta [sic] accepted as Periploma lagartillum Olsson, 1961 (misspelling)
59. Species Periploma leanum (Conrad, 1831) accepted as Cochlodesma leanum (Conrad, 1831)
60. Species Periploma micans Hedley, 1901 accepted as Pendaloma micans (Hedley, 1901) (superseded combination)
61. Species Periploma myrae M. E. Rogers, 1962 accepted as Halistrepta myrae (M. E. Rogers, 1962) (unaccepted > superseded combination)
62. Species Periploma obtusa Hanley, 1842 accepted as Periploma planiusculum G. B. Sowerby I, 1834
63. Species Periploma orbicularis Guppy, 1882 accepted as Periploma orbiculare Guppy, 1882 (unaccepted > misspelling - incorrect original spelling)
64. Species Periploma otohimeae T. Habe, 1952 accepted as Pendaloma otohimeae (T. Habe, 1952) (unaccepted > superseded combination)
65. Species Periploma ovata Kuroda & Horikoshi, 1958 accepted as Pendaloma otohimeae (T. Habe, 1952)
66. Species Periploma pacifica Okutani, 1962 accepted as Cochlodesma pacifica (Okutani, 1962) (unaccepted > superseded combination)
67. Species Periploma papyracea P. P. Carpenter, 1856 accepted as Periploma planiusculum G. B. Sowerby I, 1834 (unaccepted > junior subjective synonym)
68. Species Periploma papyratia [sic] accepted as Periploma papyratium (Say, 1822) (incorrect gender ending by Conrad, 1866)
69. Species Periploma pentadactylus Pilsbry & Olsson, 1935 accepted as Albimanus pentadactylus (Pilsbry & Olsson, 1935)
70. Species Periploma plane Ozaki, 1958 accepted as Pendaloma otohimeae (T. Habe, 1952)
71. Species Periploma subfragilis Scarlato & Kafanov, 1988 accepted as Periploma subfragile Scarlato & Kafanov, 1988 (unaccepted > incorrect grammatical agreement of specific epithet)
72. Species Periploma sulcata Dall, 1904 accepted as Halistrepta sulcata (Dall, 1904) (original combination)
73. Species Periploma tenerum (P. Fischer, 1882) accepted as Cochlodesma tenerum P. Fischer, 1882
74. Species Periploma topei Zinsmeister, 1984 † accepted as Thracia topei (Zinsmeister, 1984) †
75. Species Periploma undulatum A. E. Verrill, 1885 accepted as Cochlodesma undulatum (A. E. Verrill, 1885) (unaccepted > superseded combination)
76. Subgenus Periploma (Periploma) Schumacher, 1817 represented as Periploma Schumacher, 1817
    1. Species Periploma (Periploma) lagartilla Olsson, 1961 accepted as Periploma lagartillum Olsson, 1961 (unaccepted > superseded combination)
    2. Species Periploma (Periploma) kaiserae Valentich-Scott & Coan, 2010 represented as Periploma kaiserae Valentich-Scott & Coan, 2010
    3. Species Periploma (Periploma) planiusculum G. B. Sowerby I, 1834 represented as Periploma planiusculum G. B. Sowerby I, 1834
    4. Species Periploma (Periploma) skoglundae Valentich-Scott & Coan, 2010 represented as Periploma skoglundae Valentich-Scott & Coan, 2010
77. Subgenus Periploma (Septentrioploma) F. R. Bernard, 1989 represented as Periploma Schumacher, 1817
78. Species Periploma collardi G. D. Harris, 1895 † (uncertain > unassessed)
79. Species Periploma discus J. A. Gardner, 1926 † (uncertain > unassessed)
80. Species Periploma excurva P. P. Carpenter, 1856 (uncertain > nomen dubium)
81. Species Periploma neocomiensis A. d'Orbigny, 1845 † (uncertain > unassessed)
82. Species Periploma robinaldina A. d'Orbigny, 1845 † (uncertain > unassessed)
83. Species Periploma simplex A. d'Orbigny, 1845 † (uncertain > unassessed)

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