1. Species Placostylus abbreviatus (Gassies, 1871) †
2. Species Placostylus bondeensis (Crosse & Souverbie, 1869)
3. Species Placostylus caledonicus (Petit de la Saussaye, 1845)
4. Species Placostylus eddystonensis (L. Pfeiffer, 1855)
5. Species Placostylus fibratus (Martyn, 1784)
6. Species Placostylus leoni F. Haas, 1935 †
7. Species Placostylus porphyrostomus (L. Pfeiffer, 1853)
8. Species Placostylus scarabus (Albers, 1854)
9. Species Placostylus senilis (Gassies, 1869) †
10. Subgenus Placostylus (Acrostylus) Clench, 1935 accepted as Malaitella Clench, 1941 accepted as Eumecostylus E. von Martens, 1860 (invalid: junior homonym of Acrostylus Cossmann, 1896; Malaitella Clench, 1941 is a replacement name)
    1. Species Placostylus (Acrostylus) acutus Clench, 1935 accepted as Eumecostylus acutus (Clench, 1935) (unaccepted > superseded combination)
    2. Species Placostylus (Acrostylus) malaitensis Clench, 1941 accepted as Eumecostylus malaitensis (Clench, 1941) (unaccepted > superseded combination)
    3. Species Placostylus (Acrostylus) ophir Clench, 1941 accepted as Eumecostylus ophir (Clench, 1941) (unaccepted > superseded combination)
11. Subgenus Placostylus (Aspastus) Albers, 1850 accepted as Aspastus Albers, 1850 (unaccepted > superseded combination)
    1. Species Placostylus (Aspastus) miltocheilus (Reeve, 1848) accepted as Aspastus miltocheilus (Reeve, 1848) (unaccepted > superseded combination)
12. Subgenus Placostylus (Basileostylus) F. Haas, 1935 accepted as Basileostylus F. Haas, 1935 (unaccepted > superseded combination)
    1. Species Placostylus (Basileostylus) bollonsi Suter, 1908 accepted as Basileostylus bollonsi (Suter, 1908) (superseded combination)
13. Subgenus Placostylus (Callistocharis) Pilsbry, 1900 accepted as Callistocharis Pilsbry, 1900 (original rank)
    1. Species Placostylus (Callistocharis) gracilis (Broderip, 1841) accepted as Callistocharis fulguratus (J. C. Jay, 1842) (unaccepted > junior subjective synonym)
    2. Species Placostylus (Callistocharis) subroseus Fulton, 1915 accepted as Callistocharis subroseus (Fulton, 1915) (original combination)
14. Subgenus Placostylus (Charis) Albers, 1850 accepted as Callistocharis Pilsbry, 1900 (unaccepted > junior homonym)
    1. Species Placostylus (Charis) hargravesi (J. C. Cox, 1871) accepted as Eumecostylus hargravesi (J. C. Cox, 1871) (unaccepted > superseded combination)
    2. Species Placostylus (Charis) hartmanni Kobelt, 1891 accepted as Poecilocharis bicolor (Hartman, 1889) (junior synonym)
    3. Species Placostylus (Charis) hebridarum Mabille, 1895 accepted as Poecilocharis bicolor (Hartman, 1889)
    4. Species Placostylus (Charis) paeteli Kobelt, 1890 accepted as Callistocharis paeteli (Kobelt, 1890) (original combination)
    5. Species Placostylus (Charis) uliginosus Kobelt, 1891 accepted as Eumecostylus uliginosus (Kobelt, 1891) (basionym)
15. Subgenus Placostylus (Eumecostylus) E. von Martens, 1860 accepted as Eumecostylus E. von Martens, 1860 (unaccepted rank)
    1. Species Placostylus (Eumecostylus) cleryi (Petit de la Saussaye, 1850) accepted as Eumecostylus cleryi (Petit de la Saussaye, 1850)
    2. Species Placostylus (Eumecostylus) foxi Clench, 1950 accepted as Eumecostylus foxi (Clench, 1950) (basionym)
    3. Species Placostylus (Eumecostylus) phenax W. F. Clapp, 1923 accepted as Eumecostylus phenax (W. F. Clapp, 1923) (basionym)
16. Subgenus Placostylus (Euplacostylus) Crosse, 1875 accepted as Euplacostylus Crosse, 1875 (unaccepted > superseded rank)
    1. Species Placostylus (Euplacostylus) cylindricus Fulton, 1907 accepted as Eumecostylus cylindricus (Fulton, 1907) (basionym)
    2. Species Placostylus (Euplacostylus) seemanni (Dohrn, 1861) represented as Euplacostylus seemanni (Dohrn, 1861)
17. Subgenus Placostylus (Leucocharis) Pilsbry, 1900 accepted as Leucocharis Pilsbry, 1900 (original rank)
    1. Species Placostylus (Leucocharis) dorseyi Dall, 1910 accepted as Partula grisea Lesson, 1831 (unaccepted > junior subjective synonym)
    2. Species Placostylus (Leucocharis) loyaltyensis (Souverbie, 1879) accepted as Leucocharis loyaltyensis (Souverbie, 1879)
    3. Species Placostylus (Leucocharis) pancheri (Crosse, 1870) accepted as Leucocharis pancheri (Crosse, 1870)
    4. Species Placostylus (Leucocharis) porphyrochila (Dautzenberg & Bernier, 1901) accepted as Leucocharis porphyrochila Dautzenberg & Bernier, 1902
18. Subgenus Placostylus (Malaitella) Clench, 1941 accepted as Placocharis Pilsbry, 1900 accepted as Eumecostylus E. von Martens, 1860 (junior synonym)
19. Subgenus Placostylus (Maoristylus) F. Haas, 1935 accepted as Maoristylus F. Haas, 1935 (superseded combination)
    1. Species Placostylus (Maoristylus) ambagiosus Suter, 1907 accepted as Placostylus ambagiosus Suter, 1907 accepted as Maoristylus ambagiosus (Suter, 1907) (superseded combination)
    2. Species Placostylus (Maoristylus) bivaricosus (Gaskoin, 1855) accepted as Maoristylus bivaricosus (Gaskoin, 1855) (unaccepted > superseded combination)
    3. Species Placostylus (Maoristylus) hongii (Lesson, 1830) accepted as Placostylus hongii (Lesson, 1830) accepted as Maoristylus hongii (Lesson, 1830)
20. Subgenus Placostylus (Placocharis) Pilsbry, 1900 accepted as Placocharis Pilsbry, 1900 accepted as Eumecostylus E. von Martens, 1860 (original rank)
    1. Species Placostylus (Placocharis) artus W. F. Clapp, 1923 accepted as Placocharis kreftii (J. C. Cox, 1872) accepted as Eumecostylus kreftii (J. C. Cox, 1872) (junior synonym)
    2. Species Placostylus (Placocharis) hargravesi (J. C. Cox, 1871) accepted as Eumecostylus hargravesi (J. C. Cox, 1871) (unaccepted > superseded combination)
    3. Species Placostylus (Placocharis) manni W. F. Clapp, 1923 accepted as Eumecostylus manni (W. F. Clapp, 1923) (unaccepted > superseded combination)
21. Subgenus Placostylus (Poecilocharis) Kobelt, 1891 accepted as Poecilocharis Kobelt, 1891 (original rank)
    1. Species Placostylus (Poecilocharis) bicolor Hartman, 1889 accepted as Poecilocharis bicolor (Hartman, 1889) (unaccepted > superseded combination)
    2. Species Placostylus (Poecilocharis) francoisi Mabille, 1895 accepted as Poecilocharis bicolor (Hartman, 1889) (junior synonym)
22. Subgenus Placostylus (Proaspastus) Clench, 1941 accepted as Eumecostylus E. von Martens, 1860 (junior synonym)
    1. Species Placostylus (Proaspastus) almiranta Clench, 1941 accepted as Eumecostylus almiranta (Clench, 1941) (basionym)
    2. Species Placostylus (Proaspastus) gallegoi Clench, 1941 accepted as Eumecostylus gallegoi (Clench, 1941) (basionym)
    3. Species Placostylus (Proaspastus) hargravesi (J. C. Cox, 1871) accepted as Eumecostylus hargravesi (J. C. Cox, 1871) (unaccepted > superseded combination)
    4. Species Placostylus (Proaspastus) sanchristovalensis (J. C. Cox, 1870) accepted as Eumecostylus sanchristovalensis (J. C. Cox, 1870) (unaccepted > superseded combination)
23. Subgenus Placostylus (Santacharis) Iredale, 1927 accepted as Santacharis Iredale, 1927
    1. Species Placostylus (Santacharis) fuligineus (L. Pfeiffer, 1854) accepted as Santacharis fuligineus (L. Pfeiffer, 1854) (unaccepted > superseded combination)
24. Species Placostylus albersi Dautzenberg & Bouge, 1923 accepted as Placostylus fibratus souvillei (Morelet, 1857) (unaccepted > junior subjective synonym, nom. nov. pro Bulimus eximius Albers, 1857, non Reeve, 1842)
25. Species Placostylus alexander (Crosse, 1855) accepted as Placostylus fibratus alexander (Crosse, 1855) (unaccepted rank)
26. Species Placostylus alienus Pilsbry, 1893 accepted as Santacharis fuligineus (L. Pfeiffer, 1854) (original combination; junior synonym)
27. Species Placostylus ambagiosus Suter, 1907 accepted as Maoristylus ambagiosus (Suter, 1907) (superseded combination)
28. Species Placostylus annibal (Souverbie, 1869) accepted as Placostylus caledonicus (Petit de la Saussaye, 1845) (unaccepted > junior subjective synonym)
29. Species Placostylus bavayi (Crosse & Marie, 1868) accepted as Placostylus eddystonensis bavayi (Crosse & Marie, 1868) (unaccepted > superseded combination)
30. Species Placostylus bivaricosus (Gaskoin, 1855) accepted as Maoristylus bivaricosus (Gaskoin, 1855)
31. Species Placostylus bollonsi Suter, 1908 accepted as Basileostylus bollonsi (Suter, 1908)
32. Species Placostylus calus E. A. Smith, 1892 accepted as Eumecostylus calus (E. A. Smith, 1892) (original combination)
33. Species Placostylus cicatricosus (Gassies, 1871) accepted as Placostylus fibratus alexander (Crosse, 1855) (unaccepted > junior subjective synonym)
34. Species Placostylus cleryi (Petit de la Saussaye, 1850) accepted as Eumecostylus cleryi (Petit de la Saussaye, 1850)
35. Species Placostylus cuniculinsulae (J. C. Cox, 1872) accepted as Placostylus bivaricosus (Gaskoin, 1855) accepted as Maoristylus bivaricosus (Gaskoin, 1855) (unaccepted > junior subjective synonym)
36. Species Placostylus dorseyi Dall, 1910 accepted as Partula grisea Lesson, 1831
37. Species Placostylus duplex (Gassies, 1871) accepted as Placostylus porphyrostomus porphyrostomus (L. Pfeiffer, 1853) (unaccepted > junior subjective synonym)
38. Species Placostylus dupuyi Kobelt, 1890 accepted as Placostylus eddystonensis bavayi (Crosse & Marie, 1868) (unaccepted > junior subjective synonym)
39. Species Placostylus elobatus (A. Gould, 1846) accepted as Callistocharis elobatus (A. Gould, 1846) (unaccepted > superseded combination)
40. Species Placostylus falcicula (Gassies, 1871) accepted as Placostylus fibratus fibratus (Martyn, 1784)
41. Species Placostylus founaki (Hombron & Jacquinot, 1847) accepted as Placocharis founaki (Hombron & Jacquinot, 1847) accepted as Eumecostylus founaki (Hombron & Jacquinot, 1847)
42. Species Placostylus francoisi Mabille, 1895 accepted as Poecilocharis bicolor (Hartman, 1889) (junior synonym)
43. Species Placostylus gizoensis Clench, 1941 accepted as Placostylus bivaricosus (Gaskoin, 1855) accepted as Maoristylus bivaricosus (Gaskoin, 1855) (junior synonym)
44. Species Placostylus goulvainensis Kobelt, 1891 accepted as Placostylus porphyrostomus smithii Kobelt, 1891 (unaccepted > junior subjective synonym)
45. Species Placostylus guestieri (Gassies, 1869) accepted as Placostylus fibratus guestieri (Gassies, 1869) (unaccepted rank)
46. Species Placostylus guppyi E. A. Smith, 1892 accepted as Eumecostylus guppyi (E. A. Smith, 1892) (unaccepted > superseded combination, original combination)
47. Species Placostylus hienguensis Crosse, 1871 accepted as Placostylus eddystonensis (L. Pfeiffer, 1855) (unaccepted > junior subjective synonym)
48. Species Placostylus hongii (Lesson, 1830) accepted as Maoristylus hongii (Lesson, 1830) (superseded combination)
49. Species Placostylus houailouensis Dautzenberg, 1902 accepted as Placostylus fibratus alexander (Crosse, 1855) (unaccepted > junior subjective synonym)
50. Species Placostylus kanalensis (L. Pfeiffer, 1877) accepted as Placostylus fibratus alexander (Crosse, 1855) (junior synonym)
51. Species Placostylus layardi Kobelt, 1891 accepted as Placostylus bondeensis rossiteri (Brazier, 1881) (unaccepted > junior subjective synonym)
52. Species Placostylus leucolenus Crosse, 1896 accepted as Placostylus fibratus fibratus (Martyn, 1784) (unaccepted > junior subjective synonym)
53. Species Placostylus loyaltyensis (Souverbie, 1879) accepted as Leucocharis loyaltyensis (Souverbie, 1879)
54. Species Placostylus mariei (Crosse & P. Fischer, 1867) accepted as Placostylus porphyrostomus mariei (Crosse & P. Fischer, 1867)
55. Species Placostylus miltocheilus (Reeve, 1848) accepted as Aspastus miltocheilus (Reeve, 1848)
56. Species Placostylus ouveanus (Mousson, 1869) accepted as Placostylus fibratus ouveanus (Mousson, 1869) (unaccepted rank)
57. Species Placostylus palmarum (Mousson, 1869) accepted as Placocharis palmarum (Mousson, 1869) accepted as Eumecostylus palmarum (Mousson, 1869)
58. Species Placostylus paravicinianus B. Rensch, 1934 accepted as Eumecostylus paravicinianus (B. Rensch, 1934) (unaccepted > superseded combination)
59. Species Placostylus poyensis Kobelt, 1891 accepted as Placostylus porphyrostomus mariei (Crosse & P. Fischer, 1867) (unaccepted > superseded combination)
60. Species Placostylus priscus A. W. B. Powell, 1938 accepted as Maoristylus ambagiosus (Suter, 1907) (synonym)
61. Species Placostylus pseudocaledonicus (Montrouzier in Crosse, 1859) accepted as Placostylus scarabus (Albers, 1854) (unaccepted > junior subjective synonym)
62. Species Placostylus pyrostomus (L. Pfeiffer, 1860) accepted as Santacharis salomonis (L. Pfeiffer, 1853) (junior synonym)
63. Species Placostylus remotus Hedley, 1898 accepted as Partula remota (Hedley, 1898) (original combination)
64. Species Placostylus salomonis (Pfeiffer, 1853) accepted as Santacharis salomonis (L. Pfeiffer, 1853) (unaccepted > superseded combination)
65. Species Placostylus sanchristovalensis (J. C. Cox, 1870) accepted as Eumecostylus sanchristovalensis (J. C. Cox, 1870) (unaccepted > superseded combination)
66. Species Placostylus savesi Crosse, 1886 accepted as Placostylus eddystonensis savesi Crosse, 1886 (unaccepted > superseded combination)
67. Species Placostylus saxtoni Kobelt, 1891 accepted as Placostylus caledonicus (Petit de la Saussaye, 1845) (unaccepted > junior subjective synonym)
68. Species Placostylus scottii (J. C. Cox, 1873) accepted as Eumecostylus scottii (J. C. Cox, 1873) (unaccepted > superseded combination)
69. Species Placostylus seemanni (Dohrn, 1861) accepted as Euplacostylus seemanni (Dohrn, 1861) (unaccepted > superseded combination)
70. Species Placostylus singularis (Morelet, 1857) accepted as Placostylus porphyrostomus porphyrostomus (L. Pfeiffer, 1853) (junior synonym)
71. Species Placostylus sinistrorsa (Crosse, 1884) accepted as Placostylus fibratus ouveanus (Mousson, 1869) (based on unavailable original name)
72. Species Placostylus smithii Kobelt, 1891 accepted as Placostylus porphyrostomus smithii Kobelt, 1891 (unaccepted > superseded combination)
73. Species Placostylus souvillei (Morelet, 1857) accepted as Placostylus fibratus souvillei (Morelet, 1857)
74. Species Placostylus stutchburyi (L. Pfeiffer, 1860) accepted as Placocharis stutchburyi (L. Pfeiffer, 1860) accepted as Eumecostylus stutchburyi (L. Pfeiffer, 1860)
75. Species Placostylus superfasciatus (Gassies, 1871) accepted as Placostylus fibratus fibratus (Martyn, 1784) (junior synonym)
76. Species Placostylus unicus B. Rensch, 1934 accepted as Eumecostylus unicus (B. Rensch, 1934) (original combination)
77. Species Placostylus corpulentus (Gassies, 1871) † (uncertain > taxon inquirendum)
78. Species Placostylus pfeifferi Kobelt, 1891 (uncertain > taxon inquirendum)

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