1. Species Nodiscala bimonilifera (O. Boettger, 1902) †
2. Species Nodiscala macilenta (Cossmann, 1912) †
3. Species Nodiscala microscopica (O. Boettger, 1906) †
4. Species Nodiscala rugatina de Boury, 1912 †
5. Species Nodiscala scacchii (Hörnes, 1856) †
6. Species Nodiscala scacchii (M. Hörnes, 1856) †
7. Species Nodiscala transsylvanica (O. Boettger, 1902) †
8. Species Nodiscala ahiparana (A. W. B. Powell, 1930) accepted as Opalia ahiparana (A. W. B. Powell, 1930) (superseded combination)
9. Species Nodiscala apostolorum Iredale, 1936 accepted as Opalia apostolorum (Iredale, 1936)
10. Species Nodiscala attenuata (Pease, 1860) accepted as Opalia bicarinata (G. B. Sowerby II, 1844)
11. Species Nodiscala barbadensis (de Boury, 1913) accepted as Opalia pumilio var. moerchiana (Dall, 1889) accepted as Opalia moerchiana (Dall, 1889)
12. Species Nodiscala bardeyi Jousseaume, 1912 accepted as Opalia bardeyi (Jousseaume, 1912)
13. Species Nodiscala crystallina (P. P. Carpenter, 1864) accepted as Opalia crystallina (P. P. Carpenter, 1864)
14. Species Nodiscala dunkeri de Boury, 1890 † accepted as Opalia pumilio (Mörch, 1875)
15. Species Nodiscala elongata Jousseaume, 1912 accepted as Opalia bardeyi (Jousseaume, 1912)
16. Species Nodiscala fusoides Jousseaume, 1912 accepted as Opalia bicarinata (G. B. Sowerby II, 1844)
17. Species Nodiscala gracilis Masahito, Kuroda & T. Habe, 1971 accepted as Opalia gracilis (Masahito, Kuroda & T. Habe, 1971) (unaccepted > superseded combination)
18. Species Nodiscala japonica Okutani, 1964 accepted as Papuliscala japonica (Okutani, 1964) (unaccepted > superseded combination)
19. Species Nodiscala martis (Thiele, 1925) accepted as Opalia martis (Thiele, 1925) (unaccepted > superseded combination)
20. Species Nodiscala matajiroi Kuroda, 1954 accepted as Opalia matajiroi (Kuroda, 1954) (unaccepted > superseded combination)
21. Species Nodiscala mazatlanica (Dall, 1908) accepted as Opalia infrequens (C. B. Adams, 1852) (unaccepted > junior subjective synonym)
22. Species Nodiscala monovaricosa Kuroda & T. Habe, 1961 accepted as Opalia monovaricosa (Kuroda & T. Habe, 1961) (unaccepted > superseded combination)
23. Species Nodiscala mormulaeformis Masahito, Kuroda & T. Habe, 1971 accepted as Opalia mormulaeformis (Masahito, Kuroda & T. Habe, 1971) (unaccepted > superseded combination)
24. Species Nodiscala rissoinaeformis (Yokoyama, 1927) accepted as Opalia matajiroi (Kuroda, 1954)
25. Species Nodiscala semivaricosa de Boury, 1889 accepted as Opalia pumilio (Mörch, 1875) (junior subjective synonym)
26. Species Nodiscala sinuosocostata Landau, La Perna & Marquet, 2006 † accepted as Opalia sinuosocostata (Landau, La Perna & Marquet, 2006) †
27. Species Nodiscala spongiosa (P. P. Carpenter, 1864) accepted as Opalia spongiosa P. P. Carpenter, 1864
28. Species Nodiscala tremperi (Bartsch, 1927) accepted as Opalia infrequens (C. B. Adams, 1852) (unaccepted > junior subjective synonym)
29. Species Nodiscala zelandica H. J. Finlay, 1930 accepted as Opalia zelandica (H. J. Finlay, 1930) (superseded combination)
30. Species Nodiscala bouryi Jousseaume, 1894 (uncertain > taxon inquirendum, original combination)

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