1. Species Scala polonica Harzhauser & Landau, 2025 †
2. Subgenus Scala (Abyssiscala) de Boury, 1911 accepted as Eccliseogyra Dall, 1892 (unaccepted > junior subjective synonym)
3. Subgenus Scala (Acrilla) H. Adams, 1860 accepted as Acrilla H. Adams, 1860
   1. Species Scala (Acrilla) brandenburgi O. Boettger, 1906 † accepted as Punctiscala brandenburgi (O. Boettger, 1906) †
   2. Species Scala (Acrilla) cophinodes Melvill, 1904 accepted as Epitonium cophinodes (Melvill, 1904) (basionym)
   3. Species Scala (Acrilla) cuisensis de Boury, 1887 † accepted as Acrilla cuisensis (de Boury, 1887) † (unaccepted > superseded combination)
   4. Species Scala (Acrilla) essomiensis de Boury, 1887 † accepted as Acrilla essomiensis (de Boury, 1887) † (unaccepted > superseded combination)
   5. Species Scala (Acrilla) fayellensis de Boury, 1887 † accepted as Acrilla fayellensis (de Boury, 1887) † (unaccepted > superseded combination)
   6. Species Scala (Acrilla) gallica de Boury, 1887 † accepted as Acrilla gallica (de Boury, 1887) † (unaccepted > superseded combination)
   7. Species Scala (Acrilla) hedleyi de Boury, 1913 accepted as Amaea hedleyi (de Boury, 1912) (superseded combination)
   8. Species Scala (Acrilla) recreata de Boury, 1921 accepted as Epitonium kraussi (Nyst, 1873) (junior synonym)
   9. Species Scala (Acrilla) retifera Dall, 1889 accepted as Amaea retifera (Dall, 1889)
   10. Species Scala (Acrilla) weigandi Böse, 1910 † accepted as Acrilla weigandi (Böse, 1910) † accepted as Amaea ferminiana (Dall, 1908) (unaccepted > junior subjective synonym)
   11. Species Scala (Acrilla) xeniae O. Boettger, 1906 † accepted as Clathroscala xeniae (O. Boettger, 1906) † (unaccepted > superseded combination)
   12. Species Scala (Acrilla) jogjacartensis K. Martin, 1931 † (uncertain > taxon inquirendum)
4. Subgenus Scala (Acrilloscala) Sacco, 1890 accepted as Acrilloscala Sacco, 1890 (unaccepted > superseded rank)
   1. Species Scala (Acrilloscala) chameriacensis de Boury, 1913 † accepted as Acrilloscala chameriacensis (de Boury, 1913) † (unaccepted > superseded combination)
5. Subgenus Scala (Amaea) H. Adams & A. Adams, 1853 accepted as Amaea H. Adams & A. Adams, 1853 (original rank)
   1. Species Scala (Amaea) thielei de Boury, 1913 accepted as Amaea thielei (de Boury, 1913)
6. Subgenus Scala (Boreoscala) Kobelt, 1902 accepted as Boreoscala Kobelt, 1902 (original rank)
7. Subgenus Scala (Circuloscala) de Boury, 1886 † accepted as Circuloscala de Boury, 1886 † (unaccepted > superseded rank)
   1. Species Scala (Circuloscala) exspectata de Boury, 1913 † accepted as Epitonium subscalare (A. d'Orbigny, 1852) † (unaccepted > junior subjective synonym)
   2. Species Scala (Circuloscala) couturieauxi Glibert, 1938 † (uncertain > unassessed)
8. Subgenus Scala (Cirratiscala) de Boury, 1909 accepted as Epitonium Röding, 1798
   1. Species Cirratiscala undulatissima (G. B. Sowerby II, 1874) accepted as Epitonium irregulare (G. B. Sowerby II, 1844)
9. Subgenus Scala (Cirsotrema) Mörch, 1852 accepted as Cirsotrema Mörch, 1852 (unaccepted combination)
   1. Species Scala (Cirsotrema) bavayi de Boury, 1913 accepted as Cirsotrema varicosum (Lamarck, 1822) (unaccepted > junior subjective synonym)
   2. Species Scala (Cirsotrema) corolla Melvill & Standen, 1903 accepted as Opalia corolla (Melvill & Standen, 1903) (basionym)
   3. Species Scala (Cirsotrema) joubini de Boury, 1913 accepted as Cirsotrema varicosum (Lamarck, 1822) (junior subjective synonym)
   4. Species Scala (Cirsotrema) mammosa Melvill & Standen, 1903 accepted as Opalia mammosa (Melvill & Standen, 1903) (unaccepted > superseded combination)
   5. Species Scala (Cirsotrema) montereyensis Dall, 1907 accepted as Opalia montereyensis (Dall, 1907) (unaccepted > superseded combination)
   6. Species Scala (Cirsotrema) morchi Angas, 1871 accepted as Plastiscala morchi (Angas, 1871) (unaccepted > superseded combination)
   7. Species Scala (Cirsotrema) optima Melvill & Standen, 1903 accepted as Amaea optima (Melvill & Standen, 1903) (unaccepted > superseded combination)
   8. Species Scala (Cirsotrema) pallaryi de Boury, 1913 accepted as Cirsotrema pumiceum (Brocchi, 1814) (unaccepted > junior subjective synonym)
   9. Species Scala (Cirsotrema) texta E. A. Smith, 1903 accepted as Opalia texta (E. A. Smith, 1903) (basionym)
10. Subgenus Scala (Cirsotremopsis) Thiele, 1928 accepted as Cirsotrema Mörch, 1852 (uncertain synonym)
11. Subgenus Scala (Clathrus) Agassiz, 1837 accepted as Epitonium Röding, 1798
    1. Species Scala (Clathrus) communis (Lamarck, 1822) accepted as Epitonium clathrus (Linnaeus, 1758)
    2. Species Scala (Clathrus) gloriola Melvill & Standen, 1901 accepted as Epitonium gloriolum (Melvill & Standen, 1901) (unaccepted > superseded combination)
    3. Species Scala (Clathrus) histriaca [sic] accepted as Epitonium clathrus (Linnaeus, 1758) (misspelling of histricosa Jousseaume, 1912)
    4. Species Scala (Clathrus) melvilli Schepman, 1909 accepted as Epitonium melvilli (Schepman, 1909) (unaccepted > superseded combination)
    5. Species Scala (Clathrus) oligocostata Bałuk, 1975 † accepted as Nitidiscala oligocostata (Bałuk, 1975) † (unaccepted > superseded combination)
    6. Species Scala (Clathrus) proxima (de Boury, 1890) † accepted as Epitonium proximum (de Boury, 1890) †
    7. Species Scala (Clathrus) spinosa (Bonelli, 1826) † accepted as Clathrus spinosus (Bonelli, 1826) † (unaccepted > superseded combination)
12. Subgenus Scala (Claviscala) de Boury, 1909 accepted as Claviscala de Boury, 1909 (original rank)
13. Subgenus Scala (Confusiscala) de Boury, 1909 † accepted as Confusiscala de Boury, 1909 † (unaccepted > superseded rank)
14. Subgenus Scala (Connexiscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
    1. Species Scala (Connexiscala) cultellicosta de Boury, 1913 accepted as Epitonium cultellicostum (de Boury, 1913)
15. Subgenus Scala (Constantia) A. Adams, 1860 accepted as Constantia A. Adams, 1860
    1. Species Scala (Constantia) intertexta Melvill & Standen, 1903 accepted as Berthais egregia (A. Adams, 1863) (unaccepted > junior subjective synonym)
16. Subgenus Scala (Coroniscala) de Boury, 1909 † accepted as Cirsotrema (Coroniscala) de Boury, 1909 † represented as Cirsotrema Mörch, 1852
17. Subgenus Scala (Cycloscala) Dall, 1889 accepted as Cycloscala Dall, 1889
    1. Species Scala (Cycloscala) dunkeriana Dall, 1889 accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842) (unaccepted > junior subjective synonym)
    2. Species Scala (Cycloscala) inconstans de Boury, 1913 accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842) (synonym)
18. Subgenus Scala (Cylindriscala) de Boury, 1909 accepted as Cylindriscala de Boury, 1909 (original rank)
19. Subgenus Scala (Decussiscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (synonym)
20. Subgenus Scala (Dentiscala) de Boury, 1886 accepted as Opalia H. Adams & A. Adams, 1853
    1. Species Scala (Dentiscala) aurifila Dall, 1889 accepted as Opalia aurifila (Dall, 1889) (unaccepted > superseded combination)
    2. Species Scala (Dentiscala) crenata (Linnaeus, 1758) accepted as Opalia crenata (Linnaeus, 1758) (unaccepted > superseded combination)
    3. Species Scala (Dentiscala) gereti de Boury, 1913 accepted as Opalia gereti (de Boury, 1913) (unaccepted > superseded combination)
    4. Species Scala (Dentiscala) hellenica (Forbes, 1844) accepted as Opalia hellenica (Forbes, 1844) accepted as Opalia coronata (R. A. Philippi & Scacchi, 1840)
    5. Species Scala (Dentiscala) turriformis de Boury, 1913 (uncertain > unassessed)
21. Subgenus Scala (Depressiscala) de Boury, 1909 accepted as Depressiscala de Boury, 1909 accepted as Epitonium Röding, 1798
22. Subgenus Scala (Discoscala) Sacco, 1890 accepted as Amaea H. Adams & A. Adams, 1853
    1. Species Scala (Discoscala) edgari de Boury, 1912 accepted as Cirsotrema edgari (de Boury, 1912) (superseded combination)
23. Subgenus Scala (Eburniscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (synonym)
24. Subgenus Scala (Elegantiscala) de Boury, 1911 accepted as Cirsotrema Mörch, 1852
    1. Species Scala (Elegantiscala) marteli de Boury, 1913 accepted as Amaea marteli (de Boury, 1913) (basionym)
    2. Species Scala (Elegantiscala) splendida de Boury, 1913 accepted as Amaea splendida (de Boury, 1913) (unaccepted > superseded combination)
25. Subgenus Scala (Epitonium) Röding, 1798 accepted as Epitonium Röding, 1798
    1. Species Scala (Epitonium) parvicostata P. Marshall, 1917 † accepted as Proscala parvicostata (P. Marshall, 1917) † (superseded combination)
    2. Species Scala (Epitonium) simplex P. Marshall, 1917 † accepted as Bittiscala simplex (P. Marshall, 1917) † (superseded combination)
26. Subgenus Scala (Filiscala) de Boury, 1911 accepted as Filiscala de Boury, 1911
27. Subgenus Scala (Firmiscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (synonym)
    1. Species Scala (Firmiscala) multicostata (G. B. Sowerby II, 1844) accepted as Epitonium multicostatum (G. B. Sowerby II, 1844) (unaccepted > superseded combination)
28. Subgenus Scala (Foliaceiscala) de Boury, 1912 accepted as Epitonium Röding, 1798
    1. Species Scala (Foliaceiscala) grossicingulata de Boury, 1913 accepted as Amaea grossicingulata (de Boury, 1913) (superseded combination)
    2. Species Scala (Foliaceiscala) venusta Fenaux, 1943 accepted as Epitonium venustum (Fenaux, 1943) accepted as Epitonium immaculatum (G. B. Sowerby II, 1844) (unaccepted > superseded combination)
29. Subgenus Scala (Foveoscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (synonym)
30. Subgenus Scala (Fuscoscala) Sacco, 1890 accepted as Epitonium Röding, 1798
    1. Species Scala (Fuscoscala) viaderi Fenaux, 1938 accepted as Epitonium viaderi (Fenaux, 1938) (unaccepted > superseded combination)
    2. Species Scala (Fuscoscala) moorei Harmer, 1920 † (uncertain > unassessed)
31. Subgenus Scala (Glabriscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (a junior synonym)
32. Subgenus Scala (Globiscala) de Boury, 1909 accepted as Globiscala de Boury, 1909 (unaccepted > superseded rank)
    1. Species Scala (Globiscala) papyracea de Boury, 1912 accepted as Globiscala bullata (G. B. Sowerby II, 1844)
33. Subgenus Scala (Graciliscala) de Boury, 1909 accepted as Epitonium (Graciliscala) de Boury, 1909 accepted as Epitonium (Laeviscala) de Boury, 1909 represented as Epitonium Röding, 1798
    1. Species Scala (Graciliscala) rostrata (Jousseaume, 1912) accepted as Epitonium rostratum (Jousseaume, 1912)
34. Subgenus Scala (Gyroscala) de Boury, 1887 accepted as Gyroscala de Boury, 1887
    1. Species Scala (Gyroscala) vasconiensis de Boury, 1911 † accepted as Epitonium subscalare (A. d'Orbigny, 1852) † (unaccepted > junior subjective synonym)
    2. Species Scala (Gyroscala) canhami Harmer, 1920 † (uncertain > unassessed)
    3. Species Scala (Gyroscala) inedita Harmer, 1920 † (uncertain > unassessed)
35. Subgenus Scala (Hemiacirsa) de Boury, 1890 accepted as Acirsa Mörch, 1857
36. Subgenus Scala (Hyaloscala) de Boury, 1890 accepted as Epitonium Röding, 1798
    1. Species Scala (Hyaloscala) gradaticostata Fenaux, 1938 accepted as Epitonium gradaticostatum (Fenaux, 1938)
    2. Species Scala (Hyaloscala) reconducta de Boury, 1921 accepted as Epitonium kraussi (Nyst, 1873) (synonym)
37. Subgenus Scala (Innesiscala) de Boury, 1912 accepted as Epitonium Röding, 1798 (a junior synonym)
38. Subgenus Scala (Labeoscala) de Boury, 1912 accepted as Epitonium (Labeoscala) de Boury, 1912 represented as Epitonium Röding, 1798
    1. Species Scala (Labeoscala) labeo Jousseaume, 1912 accepted as Epitonium labeo (Jousseaume, 1912) (basionym)
    2. Species Scala (Labeoscala) perimensis Jousseaume, 1912 accepted as Epitonium perimense (Jousseaume, 1912) (original combination)
39. Subgenus Scala (Laeviscala) de Boury, 1909 accepted as Epitonium Röding, 1798
    1. Species Scala (Laeviscala) godfreyi Cotton, 1939 accepted as Epitonium godfreyi (Cotton, 1938)
40. Subgenus Scala (Lamelliscala) de Boury, 1909 accepted as Epitonium (Lamelliscala) de Boury, 1909 represented as Epitonium Röding, 1798
41. Subgenus Scala (Lepidoscala) de Boury, 1920 † accepted as Lepidiscala de Boury, 1917 accepted as Epitonium Röding, 1798
    1. Species Scala (Lepidoscala) cavelli Harmer, 1920 † (uncertain > unassessed)
42. Subgenus Scala (Limiscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (basionym)
43. Subgenus Scala (Linctoscala) Monterosato, 1890 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
    1. Species Scala (Linctoscala) inclusa Harmer, 1920 † (uncertain > unassessed)
44. Subgenus Scala (Lineoscala) de Boury, 1909 accepted as Epitonium Röding, 1798
45. Subgenus Scala (Liriscala) de Boury, 1909 accepted as Boreoscala Kobelt, 1902 (objective synonym)
46. Subgenus Scala (Littoriniscala) de Boury, 1887 † accepted as Amaea (Littoriniscala) de Boury, 1887 † represented as Amaea H. Adams & A. Adams, 1853
    1. Species Scala (Littoriniscala) lapparenti de Boury, 1887 † accepted as Amaea lapparenti (de Boury, 1887) † (unaccepted > superseded combination)
47. Subgenus Scala (Longiscala) de Boury, 1909 accepted as Epitonium Röding, 1798
48. Subgenus Scala (Mammiscala) de Boury, 1909 † accepted as Cirsotrema Mörch, 1852
    1. Species Scala (Mammiscala) ralphi de Boury, 1909 † accepted as Cirsotrema ralphi (de Boury, 1909) † accepted as Acrilla ralphi (de Boury, 1909) † (unaccepted > superseded combination)
49. Subgenus Scala (Mazescala) Iredale, 1936 accepted as Epitonium Röding, 1798
    1. Species Scala (Mazescala) beachportensis Cotton & Godfrey, 1938 accepted as Epitonium beachportense (Cotton & Godfrey, 1938)
50. Subgenus Scala (Minutiscala) de Boury, 1909 accepted as Epitonium Röding, 1798
51. Subgenus Scala (Mirilliscala) de Boury, 1922 accepted as Epitonium Röding, 1798
52. Subgenus Scala (Narvaliscala) Iredale, 1936 accepted as Narvaliscala Iredale, 1936
    1. Species Scala (Narvaliscala) flindersi Cotton & Godfrey, 1938 accepted as Narvaliscala flindersi (Cotton & Godfrey, 1938)
53. Subgenus Scala (Nitidiscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
54. Subgenus Scala (Nodiscala) de Boury, 1890 accepted as Opalia H. Adams & A. Adams, 1853
    1. Species Scala (Nodiscala) martis Thiele, 1925 accepted as Opalia martis (Thiele, 1925) (unaccepted > superseded combination)
    2. Species Scala (Nodiscala) minervae Thiele, 1925 accepted as Opalia minervae (Thiele, 1925) (unaccepted > superseded combination)
    3. Species Scala (Nodiscala) subcrassa Cotton & Godfrey, 1938 accepted as Opalia subcrassa (Cotton & Godfrey, 1938)
    4. Species Scala (Nodiscala) sumatrensis Thiele, 1925 accepted as Opalia sumatrensis (Thiele, 1925) (unaccepted > superseded combination)
55. Subgenus Scala (Opalia) H. Adams & A. Adams, 1853 accepted as Opalia H. Adams & A. Adams, 1853
    1. Species Scala (Opalia) discobolaria Dall, 1889 accepted as Cerithidea costata (da Costa, 1778) accepted as Cerithideopsis costata (da Costa, 1778)
    2. Species Scala (Opalia) gaini de Boury, 1923 accepted as Opalia gaini (de Boury, 1923)
    3. Species Scala (Opalia) humerosa Schepman, 1909 accepted as Opalia humerosa (Schepman, 1909) accepted as Cylindriscala humerosa (Schepman, 1909) (unaccepted > superseded combination)
    4. Species Scala (Opalia) nierstraszi Schepman, 1909 accepted as Gregorioiscala nierstraszi (Schepman, 1909) (unaccepted > superseded combination)
    5. Species Scala (Opalia) sibogae Schepman, 1909 accepted as Cylindriscala sibogae (Schepman, 1909) (unaccepted > superseded combination)
    6. Species Scala (Opalia) subvaricosa Mörch, 1875 accepted as Opalia pumilio (Mörch, 1875) (homonym and synonym)
    7. Species Scala (Opalia) xenicima Melvill & Standen, 1903 accepted as Gyroscala xenicima (Melvill & Standen, 1903) (unaccepted > superseded combination)
    8. Species Scala (Opalia) calvertensis G. C. Martin, 1904 † (uncertain > unassessed)
    9. Species Scala (Opalia) debouryi Dall, 1890 † (uncertain > unassessed)
    10. Species Scala (Opalia) prunicola G. C. Martin, 1904 † (uncertain > unassessed)
    11. Species Scala (Opalia) reticulata G. C. Martin, 1904 † (uncertain > unassessed)
56. Subgenus Scala (Papuliscala) de Boury, 1911 accepted as Papuliscala de Boury, 1911 (original rank)
57. Subgenus Scala (Papyriscala) de Boury, 1909 accepted as Epitonium Röding, 1798
58. Subgenus Scala (Parviscala) de Boury, 1887 accepted as Epitonium Röding, 1798
59. Subgenus Scala (Perlucidiscala) de Boury, 1912 accepted as Epitonium Röding, 1798 (a junior synonym)
    1. Species Scala (Perlucidiscala) perlucida Jousseaume, 1912 accepted as Epitonium perlucidum (Jousseaume, 1912)
60. Subgenus Scala (Plastiscala) Iredale, 1936 accepted as Acirsa Mörch, 1857 (unaccepted > junior subjective synonym)
    1. Species Scala (Plastiscala) verconis Cotton, 1939 accepted as Plastiscala verconis (Cotton, 1939) (unaccepted > superseded combination)
61. Subgenus Scala (Plesioacirsa) de Boury, 1909 accepted as Acirsa Mörch, 1857
    1. Species Scala (Plesioacirsa) chatwini Harmer, 1920 † accepted as Acirsa penepolaris (S. V. Wood, 1872) † (unaccepted > junior subjective synonym)
    2. Species Scala (Plesioacirsa) martensi de Boury, 1913 accepted as Acirsa martensi (de Boury, 1913) (basionym)
62. Subgenus Scala (Pliciscala) de Boury, 1887 accepted as Opalia (Pliciscala) de Boury, 1887 represented as Opalia H. Adams & A. Adams, 1853
63. Subgenus Scala (Pseudacirsa) Kobelt, 1903 accepted as Acirsa Mörch, 1857
    1. Species Scala (Pseudacirsa) sarsii Kobelt, 1903 accepted as Gregorioiscala sarsii (Kobelt, 1903) (basionym)
64. Subgenus Scala (Pseudoacirsa) de Boury, 1909 accepted as Pseudoacirsa de Boury, 1909 accepted as Acirsa Mörch, 1857 (original rank)
65. Subgenus Scala (Pyramiscala) de Boury, 1909 † accepted as Opalia H. Adams & A. Adams, 1853
66. Subgenus Scala (Recticuliscala) de Boury, 1909 accepted as Epitonium Röding, 1798
67. Subgenus Scala (Resticuliscala) de Boury, 1911 accepted as Scala (Recticuliscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (unaccepted > unjustified emendation)
68. Subgenus Scala (Scala) Mörch, 1852 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
    1. Species Scala (Scala) couturieri de Boury, 1913 accepted as Epitonium couturieri (de Boury, 1913) (unaccepted > superseded combination, genus is a junior synonym)
69. Subgenus Scala (Scaliola) A. Adams, 1860 accepted as Scaliola A. Adams, 1860 (unaccepted > superseded combination)
    1. Species Scala (Scaliola) bella A. Adams, 1860 accepted as Scaliola bella (A. Adams, 1860) (unaccepted > superseded combination)
70. Subgenus Scala (Sodaliscala) de Boury, 1909 accepted as Epitonium (Sodaliscala) de Boury, 1909 represented as Epitonium Röding, 1798 (a junior synonym)
    1. Species Scala (Sodaliscala) opposita de Boury, 1921 accepted as Epitonium oppositum (de Boury, 1921) (basionym)
71. Subgenus Scala (Spiniscala) de Boury, 1900 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
    1. Species Scala (Spiniscala) spinosa (Bonelli, 1826) † accepted as Scalaria spinosa Bonelli, 1826 † accepted as Clathrus spinosus (Bonelli, 1826) † (unaccepted > superseded combination)
72. Subgenus Scala (Sthenorytis) Conrad, 1863 accepted as Sthenorytis Conrad, 1863
    1. Species Scala (Sthenorhytis) belaurita Dall, 1889 accepted as Sthenorytis pernobilis (P. Fischer & Bernardi, 1857) (unaccepted > junior subjective synonym)
    2. Species Scala (Sthenorhytis) mazyckii Dall, 1896 † (uncertain > unassessed)
    3. Species Scala (Sthenorytis) stearnsii Dall, 1892 † (uncertain > unassessed)
73. Subgenus Scala (Striatiscala) de Boury, 1909 † accepted as Striatiscala de Boury, 1909
74. Subgenus Scala (Subuliscala) de Boury, 1909 † accepted as Subuliscala de Boury, 1909 † (unaccepted > superseded rank)
75. Subgenus Scala (Tumidiacirsa) de Boury, 1911 accepted as Scala (Pseudoacirsa) de Boury, 1909 accepted as Pseudoacirsa de Boury, 1909 accepted as Acirsa Mörch, 1857 (unnecessary replacement for Pseudoacirsa de Boury, 1909)
76. Subgenus Scala (Undiscala) de Boury, 1909 † accepted as Amaea (Undiscala) de Boury, 1909 † represented as Amaea H. Adams & A. Adams, 1853 (unaccepted > superseded combination)
77. Subgenus Scala (Viciniscala) de Boury, 1909 accepted as Epitonium Röding, 1798 (unaccepted > junior subjective synonym)
    1. Species Scala (Viciniscala) minuticosta de Boury, 1912 represented as Scala minuticosta de Boury, 1912 accepted as Epitonium minuticostum (de Boury, 1912)
78. Species Scala abyssicola Schepman, 1909 accepted as Epitonium abyssicola (Schepman, 1909) (unaccepted > superseded combination)
79. Species Scala acanthopleura Verco, 1906 accepted as Epitonium acanthopleurum (Verco, 1906)
80. Species Scala acus (R. B. Watson, 1883) accepted as Cylindriscala acus (R. B. Watson, 1883) (unaccepted > superseded combination)
81. Species Scala aeospila Mörch, 1875 accepted as Epitonium novangliae (Couthouy, 1838)
82. Species Scala aequalis Thiele, 1925 accepted as Epitonium aequale (Thiele, 1925)
83. Species Scala aequatorialis Thiele, 1925 accepted as Cylindriscala aequatorialis (Thiele, 1925)
84. Species Scala aethiopica Thiele, 1925 accepted as Eccliseogyra aethiopica (Thiele, 1925) (original combination)
85. Species Scala agulhasensis Thiele, 1925 accepted as Chuniscala agulhasensis (Thiele, 1925) (original combination)
86. Species Scala algoensis Thiele, 1925 accepted as Epitonium emiliae (Melvill & Standen, 1903) (possible junior synonym)
87. Species Scala alizonae Melvill, 1912 accepted as Epitonium alizonae (Melvill, 1912)
88. Species Scala amathusia Melvill & Standen, 1903 accepted as Epitonium amathusium (Melvill & Standen, 1903) (original combination)
89. Species Scala amoena Yokoyama, 1923 † accepted as Epitonium (Hyaloscala) amoenum (Yokoyama, 1923) † represented as Epitonium amoenum (Yokoyama, 1923) (unaccepted > superseded combination)
90. Species Scala angulata (Say, 1831) accepted as Epitonium angulatum (Say, 1831) (unaccepted combination)
91. Species Scala angulicincta de Boury, 1913 accepted as Epitonium angulicinctum (de Boury, 1913)
92. Species Scala antarctica E. A. Smith, 1907 accepted as Acirsa antarctica (E. A. Smith, 1907)
93. Species Scala antillarum de Boury, 1909 accepted as Epitonium candeanum (A. d'Orbigny, 1842)
94. Species Scala apiculata Dall, 1889 accepted as Epitonium apiculatum (Dall, 1889) (original combination)
95. Species Scala aspicienda Melvill, 1912 accepted as Amaea aspicienda (Melvill, 1912)
96. Species Scala aurifila Dall, 1889 accepted as Opalia aurifila (Dall, 1889) (unaccepted > superseded combination)
97. Species Scala babylonia Dall, 1889 accepted as Epitonium babylonia (Dall, 1889) (unaccepted > superseded combination)
98. Species Scala bahamensis Dall, 1889 accepted as Epitonium novangliae (Couthouy, 1838)
99. Species Scala bairdii E. A. Smith, 1872 accepted as Opalia bairdii (E. A. Smith, 1872) (original combination)
100. Species Scala barbadensis de Boury, 1913 accepted as Opalia pumilio var. moerchiana (Dall, 1889) accepted as Opalia moerchiana (Dall, 1889)
101. Species Scala bavayi de Boury, 1913 accepted as Cirsotrema varicosum (Lamarck, 1822) (unaccepted > junior subjective synonym)
102. Species Scala beachportensis Cotton & Godfrey, 1938 accepted as Epitonium beachportense (Cotton & Godfrey, 1938) (unaccepted > superseded combination)
103. Species Scala belaurita Dall, 1889 accepted as Sthenorytis pernobilis (P. Fischer & Bernardi, 1857) (unaccepted > junior subjective synonym)
104. Species Scala berryi Dall, 1907 accepted as Epitonium berryi (Dall, 1907) (original combination)
105. Species Scala bervillensis de Boury, 1913 † accepted as Opalia bervillensis (de Boury, 1913) † (unaccepted > superseded combination)
106. Species Scala bifidolirata de Boury, 1913 † accepted as Acrilloscala bifidolirata (de Boury, 1913) † (unaccepted > superseded combination)
107. Species Scala blaisei Barnard, 1963 accepted as Epitonium blaisei (Barnard, 1963) (original combination)
108. Species Scala bonaespei Barnard, 1963 accepted as Epitonium bonaespei (Barnard, 1963)
109. Species Scala bouryi Fenaux, 1938 † accepted as Epitonium bouryi (Fenaux, 1938) † (unaccepted > superseded combination)
110. Species Scala calidea Melvill & Standen, 1903 accepted as Epitonium calideum (Melvill & Standen, 1903) (original combination)
111. Species Scala centiquadra Mörch, 1875 accepted as Epitonium denticulatum (G. B. Sowerby II, 1844)
112. Species Scala cerdanta Melvill & Standen, 1903 accepted as Epitonium cerdantum (Melvill & Standen, 1903) (original combination)
113. Species Scala chameriacensis de Boury, 1913 † accepted as Acrilloscala chameriacensis (de Boury, 1913) † (unaccepted > superseded combination)
114. Species Scala clathratula (Kanmacher, 1798) accepted as Epitonium clathratulum (Kanmacher, 1798)
115. Species Scala clathrus (Linnaeus, 1758) accepted as Epitonium clathrus (Linnaeus, 1758) (synonym)
116. Species Scala cloezi de Boury, 1887 † accepted as Cerithiscala cloezi (de Boury, 1887) † (unaccepted > superseded combination)
117. Species Scala columna Fenaux, 1938 accepted as Epitonium columnum (Fenaux, 1938)
118. Species Scala commutata (Monterosato, 1877) accepted as Gyroscala commutata (Monterosato, 1877) (superseded combination)
119. Species Scala concava Dall, 1889 accepted as Opaliopsis concava (Dall, 1889) (original combination)
120. Species Scala continens Melvill & Standen, 1903 accepted as Epitonium continens (Melvill & Standen, 1903) (original combination)
121. Species Scala contorquata Dall, 1889 accepted as Epitonium krebsii (Mörch, 1875)
122. Species Scala cophinodes Melvill, 1904 accepted as Epitonium cophinodes (Melvill, 1904) (original combination)
123. Species Scala corolla Melvill & Standen, 1903 accepted as Opalia corolla (Melvill & Standen, 1903) (original combination)
124. Species Scala coronata Lamarck, 1816 accepted as Epitonium coronatum (Lamarck, 1816) represented as Gyroscala coronata (Lamarck, 1816)
125. Species Scala costigera Thiele, 1925 accepted as Punctiscala costigera (Thiele, 1925)
126. Species Scala costulata (Kiener, 1838) accepted as Surrepifungium costulatum (Kiener, 1838)
127. Species Scala cultellicosta de Boury, 1913 accepted as Epitonium cultellicostum (de Boury, 1913)
128. Species Scala deifica Melvill & Standen, 1903 accepted as Epitonium deificum (Melvill & Standen, 1903) (original combination)
129. Species Scala delicatula H. Adams, 1869 accepted as Epitonium tenerum (H. Adams, 1873) (unaccepted > junior homonym, non Scalaria delicatula Crosse & P. Fischer, 1864; Scala tenera H. Adams, 1873, Scalaria subnudata G. B. Sowerby II, 1874 and Scalaria lancerotensis Nyst, 1882 are replacement names)
130. Species Scala ducalis Mörch, 1875 accepted as Epitonium albidum (A. d'Orbigny, 1842)
131. Species Scala dunkeriana Dall, 1889 accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842)
132. Species Scala durbanensis E. A. Smith, 1906 accepted as Epitonium multicostatum (G. B. Sowerby II, 1844)
133. Species Scala eborea E. A. Smith, 1906 accepted as Epitonium eboreum (E. A. Smith, 1906)
134. Species Scala echinaticosta (A. d'Orbigny, 1842) accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842)
135. Species Scala eclectica Melvill & Standen, 1903 accepted as Epitonium eclecticum (Melvill & Standen, 1903) (unaccepted > superseded combination)
136. Species Scala elata Thiele, 1925 accepted as Opaliopsis elata (Thiele, 1925) (original combination)
137. Species Scala electa A. E. Verrill & K. J. Bush, 1900 accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842) (unaccepted > junior subjective synonym)
138. Species Scala elegantula A. Adams, 1861 accepted as Epitonium elegantulum (A. Adams, 1861) (original combination)
139. Species Scala emiliae Melvill & Standen, 1903 accepted as Epitonium emiliae (Melvill & Standen, 1903) (unaccepted > superseded combination)
140. Species Scala erectispina Mörch, 1875 accepted as Epitonium venosum (G. B. Sowerby II, 1844)
141. Species Scala eulita Dall & C. T. Simpson, 1901 accepted as Epitonium eulita (Dall & C. T. Simpson, 1901)
142. Species Scala evicta (de Boury, 1918) accepted as Opalia montereyensis (Dall, 1907) (unaccepted > junior subjective synonym)
143. Species Scala extenuicostata de Boury, 1913 accepted as Epitonium extenuicostum (de Boury, 1913)
144. Species Scala ferruginea (Mörch, 1844) accepted as Epitonium ferrugineum (Mörch, 1852)
145. Species Scala ferussaci [sic] accepted as Epitonium ferussacii (Audouin, 1826) (misspelling)
146. Species Scala filaris (Mörch, 1875) accepted as Gyroscala lamellosa (Lamarck, 1822) accepted as Gyroscala commutata (Monterosato, 1877)
147. Species Scala fimbriata A. Adams, 1861 accepted as Cirsotrema fimbriatulum (Masahito, Kuroda & T. Habe, 1971) (invalid: junior homonym of Scala fimbriata Lamarck, 1816)
148. Species Scala flindersi Cotton & Godfrey, 1938 accepted as Narvaliscala flindersi (Cotton & Godfrey, 1938)
149. Species Scala formosissima (Jeffreys, 1884) sensu Dall, 1889 accepted as Eccliseogyra performosa (de Boury, 1917) (unaccepted > misapplication)
150. Species Scala fragilissima Schepman, 1909 accepted as Eccliseogyra fragilissima (Schepman, 1909) (unaccepted > superseded combination)
151. Species Scala frielei Dall, 1889 accepted as Epitonium frielei (Dall, 1889)
152. Species Scala gemmula (W. H. Turton, 1932) accepted as Benthobrookula gemmula (W. H. Turton, 1932) (unaccepted > superseded combination)
153. Species Scala gereti de Boury, 1913 accepted as Opalia gereti (de Boury, 1913)
154. Species Scala gloriola Melvill & Standen, 1901 accepted as Epitonium gloriolum (Melvill & Standen, 1901)
155. Species Scala godfreyi Cotton, 1938 accepted as Epitonium godfreyi (Cotton, 1938) (unaccepted > superseded combination)
156. Species Scala goniophora Melvill & Standen, 1903 accepted as Epitonium goniophorum (Melvill & Standen, 1903) (unaccepted > superseded combination)
157. Species Scala gradatella Mörch, 1875 accepted as Epitonium albidum (A. d'Orbigny, 1842)
158. Species Scala gradaticostata Fenaux, 1938 accepted as Epitonium gradaticostatum (Fenaux, 1938)
159. Species Scala gratissima Thiele, 1925 accepted as Amaea gratissima (Thiele, 1925) (original combination)
160. Species Scala groenlandica (Chemnitz, 1795) accepted as Boreoscala greenlandica (G. Perry, 1811) (non-binominal)
161. Species Scala groenlandica (Møller, 1842) accepted as Boreoscala greenlandica (G. Perry, 1811)
162. Species Scala grossicingulata de Boury, 1913 accepted as Amaea grossicingulata (de Boury, 1913)
163. Species Scala hedleyi de Boury, 1913 accepted as Amaea hedleyi (de Boury, 1912) (superseded combination)
164. Species Scala herouvalensis Fenaux, 1938 † accepted as Epitonium herouvalense (Fenaux, 1938) † (unaccepted > superseded combination)
165. Species Scala humerosa G. B. Sowerby III, 1901 accepted as Epitonium humerosum (G. B. Sowerby III, 1901)
166. Species Scala humerosa Schepman, 1909 accepted as Cylindriscala humerosa (Schepman, 1909) (unaccepted > superseded combination)
167. Species Scala humphreysii (Kiener, 1838) accepted as Epitonium humphreysii (Kiener, 1838) (unaccepted combination)
168. Species Scala idalia Melvill, 1912 accepted as Epitonium idalium (Melvill, 1912) (unaccepted > superseded combination)
169. Species Scala illovoensis Barnard, 1963 accepted as Epitonium illovoense (Barnard, 1963)
170. Species Scala inaequalis Thiele, 1925 accepted as Epitonium inaequale (Thiele, 1925) (unaccepted > superseded combination)
171. Species Scala inconstans de Boury, 1913 accepted as Cycloscala echinaticosta (A. d'Orbigny, 1842) (synonym)
172. Species Scala incurvata Fenaux, 1938 accepted as Epitonium incurvatum (Fenaux, 1938)
173. Species Scala intertexta Melvill & Standen, 1903 accepted as Berthais intertexta (Melvill & Standen, 1903) accepted as Berthais egregia (A. Adams, 1863) (unaccepted > junior subjective synonym)
174. Species Scala invalida Verco, 1906 accepted as Plastiscala invalida (Verco, 1906)
175. Species Scala joubini de Boury, 1913 accepted as Cirsotrema varicosum (Lamarck, 1822)
176. Species Scala kamakurana Pilsbry, 1911 (unaccepted, junior synonym)
177. Species Scala krebsii Mörch, 1875 (unaccepted)
178. Species Scala labeo Jousseaume, 1912 (unaccepted, original combination)
179. Species Scala laidlawi Melvill & Standen, 1903 (unaccepted > superseded combination)
180. Species Scala lamellosa (Lamarck, 1822) (unaccepted)
181. Species Scala lamyi de Boury, 1909 (unaccepted)
182. Species Scala levifoliata Murdoch & Suter, 1906 (unaccepted, superseded combination)
183. Species Scala liliputana A. Adams, 1861 (unaccepted)
184. Species Scala lirulata Thiele, 1925 (unaccepted)
185. Species Scala lowei Dall, 1906 (unaccepted, original combination)
186. Species Scala lyra (G. B. Sowerby II, 1844) sensu Yokoyama, 1927 (unaccepted > misapplication)
187. Species Scala macromphalus (E. A. Smith, 1910) (unaccepted > superseded combination)
188. Species Scala malayana Thiele, 1925 (unaccepted)
189. Species Scala malcolmensis [sic] (unaccepted, misspelling)
190. Species Scala malhaensis Jousseaume, 1894 (unaccepted, original combination)
191. Species Scala mammosa Melvill & Standen, 1903 (unaccepted)
192. Species Scala marteli de Boury, 1913 (unaccepted, original combination)
193. Species Scala martensi de Boury, 1913 (unaccepted > superseded combination)
194. Species Scala martis Thiele, 1925 (unaccepted > superseded combination)
195. Species Scala mathildopsis Barnard, 1963 (unaccepted)
196. Species Scala melior Melvill & Standen, 1903 (unaccepted > superseded combination)
197. Species Scala melvilli Schepman, 1909 (unaccepted > superseded combination)
198. Species Scala micromphala Mörch, 1875 (unaccepted)
199. Species Scala minervae Thiele, 1925 (unaccepted > superseded combination)
200. Species Scala minuticosta de Boury, 1912 (unaccepted)
201. Species Scala minutula (Tate & May, 1900) (unaccepted)
202. Species Scala miranda E. A. Smith, 1872 (unaccepted)
203. Species Scala misera de Boury, 1913 (unaccepted)
204. Species Scala mitchelli Dall, 1896 (unaccepted, original combination)
205. Species Scala montereyensis Dall, 1907 (unaccepted > superseded combination)
206. Species Scala monterosatoi de Boury, 1890 (unaccepted)
207. Species Scala mucronata Fenaux, 1943 (unaccepted > superseded combination)
208. Species Scala munda Barnard, 1969 (unaccepted)
209. Species Scala muscapedia Dall, 1889 (unaccepted)
210. Species Scala nautlae Mörch, 1875 (unaccepted)
211. Species Scala nepeanensis Gatliff, 1906 (unaccepted > superseded combination)
212. Species Scala nierstraszi Schepman, 1909 (unaccepted > superseded combination)
213. Species Scala nitidella Dall, 1889 (unaccepted)
214. Species Scala nodifera Thiele, 1925 (unaccepted, possible synonym)
215. Species Scala nodosocarinata Dall, 1889 (unaccepted)
216. Species Scala novemcostata Mörch, 1875 (unaccepted)
217. Species Scala occidentalis (Nyst, 1873) (unaccepted)
218. Species Scala octocostata Mörch, 1875 (unaccepted)
219. Species Scala octolineata Conrad, 1860 † (unaccepted > superseded combination)
220. Species Scala opposita de Boury, 1921 (unaccepted, original combination)
221. Species Scala optabilis A. Adams, 1861 (unaccepted > superseded combination)
222. Species Scala optima Melvill & Standen, 1903 (unaccepted)
223. Species Scala orientalis Thiele, 1925 (unaccepted, original combination)
224. Species Scala padangensis Thiele, 1925 (unaccepted > superseded combination)
225. Species Scala pallaryi de Boury, 1913 (unaccepted > junior subjective synonym)
226. Species Scala papyracea de Boury, 1912 (unaccepted)
227. Species Scala parspeciosa Iredale, 1929 (unaccepted)
228. Species Scala parvicostata P. Marshall, 1917 † (unaccepted)
229. Species Scala pasiphaes Melvill, 1912 (unaccepted > superseded combination)
230. Species Scala pauli de Boury, 1913 (unaccepted > junior objective synonym)
231. Species Scala perfoliata Thiele, 1925 (unaccepted)
232. Species Scala performosa de Boury, 1917 (unaccepted, original combination)
233. Species Scala perlucida Fenaux, 1943 (unaccepted > superseded combination)
234. Species Scala perplicata Iredale, 1929 (unaccepted, junior subjective synonym)
235. Species Scala platypleura Verco, 1906 (unaccepted)
236. Species Scala polacia Dall, 1889 (unaccepted)
237. Species Scala pompholyx Dall, 1890 (unaccepted > superseded combination)
238. Species Scala pretiosa (Lamarck, 1816) (unaccepted, unaccepted combination)
239. Species Scala pretiosula Mörch, 1875 (unaccepted)
240. Species Scala proxima Douvillé, 1904 † (unaccepted, treated by Cossmann as a junior homonym of Clathrus proxilus (de Boury, 1890); Cavoscala louristanensis is a replacement name)
241. Species Scala proxima Thiele, 1925 (unaccepted > superseded combination)
242. Species Scala pulchella (Bivona e Bernardi, 1832) (unaccepted > superseded combination)
243. Species Scala punctata Thiele, 1925 (unaccepted, original combination)
244. Species Scala quindecimcostata Mörch, 1875 (unaccepted)
245. Species Scala reconducta de Boury, 1921 (unaccepted > junior subjective synonym)
246. Species Scala recreata de Boury, 1921 (unaccepted, junior synonym)
247. Species Scala rectilaminata Dall, 1907 (unaccepted, junior synonym)
248. Species Scala reevesbyi Cotton, 1939 (unaccepted, junior subjective synonym)
249. Species Scala regularis Thiele, 1925 (unaccepted, original combination)
250. Species Scala revoluta Hedley, 1899 (unaccepted)
251. Species Scala rissoinaeformis Yokoyama, 1927 (unaccepted)
252. Species Scala rissoinaeformis Melvill & Standen, 1903 (unaccepted > superseded combination)
253. Species Scala rushii Dall, 1889 (unaccepted, synonym)
254. Species Scala sagamiensis Pilsbry, 1911 (unaccepted, junior synonym)
255. Species Scala sawinae Dall, 1903 (unaccepted, original combination)
256. Species Scala sayana Dall, 1889 (unaccepted)
257. Species Scala scaeva Mörch, 1875 (unaccepted)
258. Species Scala scalaris (Linnaeus, 1758) (unaccepted)
259. Species Scala schoedei Thiele, 1925 (unaccepted > superseded combination)
260. Species Scala scipio Dall, 1889 (unaccepted)
261. Species Scala sericifila Dall, 1889 (unaccepted)
262. Species Scala sibogae Schepman, 1909 (unaccepted > superseded combination)
263. Species Scala simplex P. Marshall, 1917 † (unaccepted, superseded combination)
264. Species Scala soluta Mörch, 1875 (unaccepted)
265. Species Scala soluta A. Adams, 1862 (unaccepted > superseded combination)
266. Species Scala soror Odhner, 1919 (unaccepted)
267. Species Scala spinarosae Mörch, 1875 (unaccepted)
268. Species Scala splendida de Boury, 1913 (unaccepted > superseded combination)
269. Species Scala spuria Mörch, 1875 (unaccepted)
270. Species Scala staminea Contad, 1860 † (unaccepted, original combination)
271. Species Scala stigmatica Pilsbry, 1911 (unaccepted, original combination)
272. Species Scala stylina Dall, 1889 (unaccepted, superseded combination)
273. Species Scala subcasta (E. A. Smith, 1899) (unaccepted)
274. Species Scala subcrassa Cotton & Godfrey, 1938 (unaccepted > superseded combination)
275. Species Scala subvaricosa Mörch, 1875 (unaccepted, preoccupied by Scala subvaricosa Cantraine, 1842)
276. Species Scala sumatrensis Thiele, 1925 (unaccepted, original combination)
277. Species Scala swiftii Mörch, 1875 (unaccepted)
278. Species Scala sykesii Melvill & Standen, 1903 (unaccepted > superseded combination)
279. Species Scala tangana Thiele, 1925 (unaccepted)
280. Species Scala tenebrosa G. B. Sowerby III, 1903 (unaccepted)
281. Species Scala tenera H. Adams, 1873 (unaccepted > junior homonym, not Scalaria tenera G. B. Sowerby I, 1847)
282. Species Scala tenuicosta [sic] (unaccepted > junior subjective synonym, and misspelling)
283. Species Scala terebriformis Thiele, 1925 (unaccepted)
284. Species Scala texta E. A. Smith, 1903 (unaccepted, original combination)
285. Species Scala thelcteria Melvill & Standen, 1903 (unaccepted > superseded combination, original combination)
286. Species Scala thielei de Boury, 1913 (unaccepted)
287. Species Scala tiberii de Boury, 1890 (unaccepted)
288. Species Scala tomlini de Boury, 1913 (unaccepted, superseded combination)
289. Species Scala torquata Fenaux, 1943 (unaccepted, junior subjective synonym)
290. Species Scala townsendi Melvill & Standen, 1903 (unaccepted > superseded combination)
291. Species Scala trabeculata A. Adams, 1861 (unaccepted > superseded combination)
292. Species Scala translucida Gatliff, 1906 (unaccepted, original combination)
293. Species Scala trochoides de Boury, 1912 (unaccepted, proccupied by Turbo trochiformis Brocchi, 1814)
294. Species Scala tryoni de Boury, 1913 (unaccepted > superseded combination)
295. Species Scala tumidula Thiele, 1930 (unaccepted)
296. Species Scala turris Fenaux, 1943 (unaccepted)
297. Species Scala turrisphari Hedley, 1905 (unaccepted, original combination)
298. Species Scala turritellula Mörch, 1875 (unaccepted, original combination)
299. Species Scala tydemani Schepman, 1909 (unaccepted > junior subjective synonym)
300. Species Scala undecimcostata Mörch, 1875 (unaccepted)
301. Species Scala valida Verco, 1906 (unaccepted)
302. Species Scala vatinae de Boury, 1912 † (unaccepted > superseded combination)
303. Species Scala vayssierei Dautzenberg, 1911 (unaccepted, dubious synonym)
304. Species Scala verconis Cotton, 1939 (unaccepted > superseded combination)
305. Species Scala vetusta Aldrich, 1907 † (unaccepted, original combination)
306. Species Scala viaderi Fenaux, 1938 (unaccepted)
307. Species Scala virgo Thiele, 1925 (unaccepted)
308. Species Scala vitrea Thiele, 1925 (unaccepted, original combination)
309. Species Scala volubilis Mörch, 1875 (unaccepted)
310. Species Scala watsoni (de Boury, 1911) (unaccepted, superseded combination)
311. Species Scala wroblewskyi Mörch, 1875 (unaccepted > superseded combination)
312. Species Scala xenicima Melvill & Standen, 1903 (unaccepted, original combination)
313. Subgenus Scala (Dauciscala) de Boury, 1917 † (uncertain > unassessed)
314. Subgenus Scala (Nobiliscala) de Boury, 1917 (uncertain > unassessed)
315. Species Scala capitata Thiele, 1925 (uncertain > taxon inquirendum)
316. Species Scala dolosa Aldrich, 1907 † (uncertain > taxon inquirendum)
317. Species Scala eburnea Potiez & Michaud, 1838 (uncertain > nomen dubium)
318. Species Scala marylandica G. C. Martin, 1904 † (uncertain > unassessed)
319. Species Scala permodesta Dall, 1889 (uncertain > nomen dubium)
320. Species Scala praeclara A. Adams, 1861 (uncertain > nomen dubium)
321. Species Scala ranellina Dall, 1896 † (uncertain > unassessed)
322. Species Scala spiralis A. Adams, 1861 (uncertain > nomen dubium)
323. Species Scala vidali de Boury, 1911 † (uncertain > unassessed)

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