1. Species Diala albugo (R. B. Watson, 1886)
2. Species Diala exilis (Tryon, 1866)
3. Species Diala lirulata Thiele, 1930
4. Species Diala megapicalis Ponder & de Keyzer, 1992
5. Species Diala pusilla Thiele, 1930
6. Species Diala semistriata (R. A. Philippi, 1849)
7. Species Diala stephensae (F. Baker, G. D. Hanna & A. M. Strong, 1930)
8. Species Diala sulcifera (A. Adams, 1862)
9. Species Diala suturalis (A. Adams, 1853)
10. Species Diala acuta P. P. Carpenter, 1864 accepted as Pseudodiala acuta (P. P. Carpenter, 1864) (original combination)
11. Species Diala africana Bartsch, 1915 accepted as Hydrobiidae incertae sedis africana Bartsch, 1915 (original combination)
12. Species Diala almo Bartsch, 1915 accepted as Hydrobiidae incertae sedis almo (Bartsch, 1915) (original combination)
13. Species Diala cacumenata Laseron, 1956 accepted as Diala semistriata (R. A. Philippi, 1849)
14. Species Diala capensis G. B. Sowerby III, 1889 accepted as Alaba pinnae (Krauss, 1848)
15. Species Diala capensis Bartsch, 1915 accepted as Diala jordani Tomiln, 1939 accepted as Hydrobiidae incertae sedis jordani (Tomlin, 1939) (invalid; junior homonym of Diala capensis G. B. Sowerby III, 1889; Diala jordani Tomlin, 1939 is a replacement name.)
16. Species Diala cento Laseron, 1956 accepted as Diala suturalis (A. Adams, 1853) (unaccepted > junior subjective synonym)
17. Species Diala cingulifera W. H. Turton, 1932 accepted as Eatoniella cingulifera (W. H. Turton, 1932) (original combination)
18. Species Diala conica W. H. Turton, 1932 accepted as Diala semistriata (R. A. Philippi, 1849)
19. Species Diala conspicua Laseron, 1956 accepted as Diala albugo (R. B. Watson, 1886) (unaccepted > junior subjective synonym)
20. Species Diala convexa W. H. Turton, 1932 accepted as Hydrobiidae incertae sedis convexa (W. H. Turton, 1932)
21. Species Diala cornea A. Adams, 1861 accepted as Alaba cornea (A. Adams, 1861) (original combination)
22. Species Diala diffilata Laseron, 1956 accepted as Alaba diffilata (Laseron, 1956) (original combination)
23. Species Diala dubia G. B. Sowerby III, 1892 accepted as Hydrobiidae incertae sedis dubia (G. B. Sowerby III, 1892) (original combination)
24. Species Diala electrina P. P. Carpenter, 1864 accepted as Lirobarleeia electrina (P. P. Carpenter, 1864) (original combination)
25. Species Diala flammea (Pease, 1868) accepted as Diala sulcifera sulcifera (A. Adams, 1862) (unaccepted > junior subjective synonym)
26. Species Diala fossa Laseron, 1956 accepted as Diala sulcifera sulcifera (A. Adams, 1862) (unaccepted > junior subjective synonym)
27. Species Diala fragilis Thiele, 1930 accepted as Alaba fragilis (Thiele, 1930) (original combination)
28. Species Diala fuscopicta E. A. Smith, 1890 accepted as Barleeia fuscopicta (E. A. Smith, 1890) (original combination)
29. Species Diala hardyi Melvill & Standen, 1895 accepted as Diala sulcifera sulcifera (A. Adams, 1862) (unaccepted > junior subjective synonym)
30. Species Diala hartmeyeri Thiele, 1930 accepted as Alaba hartmeyeri (Thiele, 1930) (original combination)
31. Species Diala infrasulcata G. B. Sowerby III, 1892 accepted as Diala semistriata (R. A. Philippi, 1849)
32. Species Diala jordani Tomiln, 1939 accepted as Hydrobiidae incertae sedis jordani (Tomlin, 1939) (original combination)
33. Species Diala kraussi W. H. Turton, 1932 accepted as Hydrobiidae incertae sedis kraussi (W. H. Turton, 1932) (original combination)
34. Species Diala lara W. H. Turton, 1932 accepted as Pisinna lara (W. H. Turton, 1932) (original combination)
35. Species Diala lauta (A. Adams, 1862) accepted as Diala suturalis (A. Adams, 1853)
36. Species Diala leithii (E. A. Smith, 1876) accepted as Mainwaringia leithii (E. A. Smith, 1876) (unaccepted > superseded combination)
37. Species Diala leucosticta A. Adams, 1861 accepted as Alaba leucosticta (A. Adams, 1861) (original combination)
38. Species Diala lirata Laseron, 1950 accepted as Diffalaba opiniosa Iredale, 1936 (invalid: junior homonym of Diala lirata H. Adams & A. Adams, 1864)
39. Species Diala ludens Melvill & Standen, 1895 accepted as Diala albugo (R. B. Watson, 1886) (unaccepted > junior subjective synonym)
40. Species Diala macula G. Nevill, 1885 accepted as Diala varia A. Adams, 1861 accepted as Diala semistriata (R. A. Philippi, 1849) (synonym)
41. Species Diala magna Tate, 1891 accepted as Diala suturalis (A. Adams, 1853) (unaccepted > junior subjective synonym)
42. Species Diala marmorea P. P. Carpenter, 1864 accepted as Pseudodiala acuta (P. P. Carpenter, 1864)
43. Species Diala michaelseni Thiele, 1930 accepted as Styliferina michaelseni (Thiele, 1930) (unaccepted > superseded combination)
44. Species Diala monile A. Adams, 1862 accepted as Alaba monile A. Adams, 1862
45. Species Diala picta A. Adams, 1861 accepted as Alaba picta (A. Adams, 1861) (unaccepted > superseded combination)
46. Species Diala pinnae (Krauss, 1848) accepted as Alaba pinnae (Krauss, 1848)
47. Species Diala planalba Laseron, 1956 accepted as Diala semistriata (R. A. Philippi, 1849)
48. Species Diala polita Preston, 1905 accepted as Diala semistriata (R. A. Philippi, 1849) (unaccepted > junior subjective synonym)
49. Species Diala polyaulax Tomlin, 1923 accepted as Alaba polyaulax (Tomlin, 1923) (original combination)
50. Species Diala premeris Laseron, 1956 accepted as Diala sulcifera sulcifera (A. Adams, 1862) (unaccepted > junior subjective synonym)
51. Species Diala profunda Hedley, 1899 accepted as Mellitestea profunda (Hedley, 1899) (original combination)
52. Species Diala punctata Tenison Woods, 1876 accepted as Diala suturalis (A. Adams, 1853) (unaccepted > junior subjective synonym)
53. Species Diala scitula W. H. Turton, 1932 accepted as Hydrobiidae incertae sedis scitula (W. H. Turton, 1932) (original combination)
54. Species Diala scopulorum (R. B. Watson, 1886) accepted as Mellitestea scopulorum (R. B. Watson, 1886)
55. Species Diala semipellucida Preston, 1905 accepted as Alaba semipellucida (Preston, 1905) (unaccepted > superseded combination)
56. Species Diala simplex E. A. Smith, 1875 accepted as Barleeia simplex (E. A. Smith, 1875) (original combination)
57. Species Diala stricta T. Habe, 1960 accepted as Diala semistriata (R. A. Philippi, 1849) (unaccepted > junior subjective synonym)
58. Species Diala subcarinata Murdoch & Suter, 1906 accepted as Aclis subcarinata (Murdoch & Suter, 1906) (superseded combination)
59. Species Diala tenuis E. A. Smith, 1875 accepted as Styliferina tenuis (E. A. Smith, 1875) (unaccepted > superseded combination)
60. Species Diala tesselata Tenison Woods, 1876 accepted as Alaba monile A. Adams, 1862 (unaccepted > junior subjective synonym)
61. Species Diala tomlini Viader, 1938 accepted as Styliferina tomlini (Viader, 1938) (unaccepted > superseded combination)
62. Species Diala translucida Hedley, 1906 accepted as Styliferina translucida (Hedley, 1905) (unaccepted > superseded combination)
63. Species Diala trilirata Melvill, 1906 accepted as Diala semistriata (R. A. Philippi, 1849) (unaccepted > junior subjective synonym)
64. Species Diala tumerosa Laseron, 1956 accepted as Mellitestea tumerosa (Laseron, 1956) (original combination)
65. Species Diala tumida Tenison Woods, 1876 accepted as Pisinna tumida (Tenison Woods, 1876) (original combination)
66. Species Diala turrita W. H. Turton, 1932 accepted as Assimineidae incertae sedis turrita (W. H. Turton, 1932) (original combination)
67. Species Diala turritella W. H. Turton, 1932 accepted as Assimineidae incertae sedis turritella (W. H. Turton, 1932) (original combination)
68. Species Diala varia A. Adams, 1861 accepted as Diala semistriata (R. A. Philippi, 1849) (unaccepted > junior subjective synonym)
69. Species Diala vestigia Laseron, 1956 accepted as Diala semistriata (R. A. Philippi, 1849)
70. Species Diala virgata Hedley, 1899 accepted as Diala albugo (R. B. Watson, 1886) (unaccepted > junior subjective synonym)
71. Species Diala vitrea G. B. Sowerby III, 1915 accepted as Alaba picta (A. Adams, 1861)
72. Species Diala watsoni Laseron, 1956 accepted as Diala semistriata (R. A. Philippi, 1849)
73. Species Diala fragilis (Fenaux, 1943) (uncertain > taxon inquirendum)
74. Species Diala lirata H. Adams & A. Adams, 1864 (uncertain > taxon inquirendum)
75. Species Diala nodicincta H. Adams & A. Adams, 1864 (uncertain > taxon inquirendum)
76. Species Diala succincta A. Adams, 1870 (uncertain > unassessed, use in recent literature not established by editor)

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