1. Subgenus Solarium (Torinia) J. E. Gray, 1842 accepted as Heliacus A. d'Orbigny, 1842 (unaccepted > junior subjective synonym)
   1. Species Solarium (Torinia) homalaxis Melvill, 1893 accepted as Heliacus implexus (Mighels, 1845) (unaccepted > junior subjective synonym)
2. Species Solarium alfredensis W. H. Turton, 1932 accepted as Heliacus (Torinista) implexus (Mighels, 1845) represented as Heliacus implexus (Mighels, 1845) (junior subjective synonym)
3. Species Solarium allerii G. Seguenza, 1876 accepted as Solarium alleryi G. Seguenza, 1876 accepted as Solatisonax alleryi (G. Seguenza, 1876) (original spelling, not in current use)
4. Species Solarium alleryi G. Seguenza, 1876 accepted as Solatisonax alleryi (G. Seguenza, 1876)
5. Species Solarium architae O. G. Costa, 1841 accepted as Pseudotorinia architae (O. G. Costa, 1841) (unaccepted > superseded combination)
6. Species Solarium calcar O. G. Costa, 1861 accepted as Bolma rugosa (Linnaeus, 1767)
7. Species Solarium certesi Dautzenberg & H. Fischer, 1896 accepted as Solatisonax certesi (Dautzenberg & H. Fischer, 1896)
8. Species Solarium contextum G. Seguenza, 1876 accepted as Solatisonax contexta (G. Seguenza, 1876) (unaccepted > superseded combination)
9. Species Solarium conulus Weinkauff, 1868 accepted as Philippia hybrida (Linnaeus, 1758)
10. Species Solarium discoideum Locard, 1886 accepted as Discotectonica discus (R. A. Philippi, 1844) (unaccepted > unjustified emendation)
11. Species Solarium discus R. A. Philippi, 1844 accepted as Discotectonica discus (R. A. Philippi, 1844) (unaccepted > superseded combination)
12. Species Solarium dollfusi Dautzenberg & H. Fischer, 1896 accepted as Solatisonax dollfusi (Dautzenberg & H. Fischer, 1896)
13. Species Solarium fallaciosum Tiberi, 1872 accepted as Heliacus (Grandeliacus) fallaciosus (Tiberi, 1872) represented as Heliacus fallaciosus (Tiberi, 1872) (unaccepted > superseded combination)
14. Species Solarium granosum Valenciennes, 1832 accepted as Architectonica nobilis Röding, 1798 (unaccepted > junior subjective synonym)
15. Species Solarium granulatum Lamarck, 1816 accepted as Architectonica nobilis Röding, 1798
16. Species Solarium homalaxis Melvill, 1893 accepted as Heliacus (Torinista) implexus (Mighels, 1845) represented as Heliacus implexus (Mighels, 1845) (junior subjective synonym)
17. Species Solarium implexum Mighels, 1845 accepted as Heliacus (Torinista) implexus (Mighels, 1845) represented as Heliacus implexus (Mighels, 1845) (superseded combination)
18. Species Solarium luteum Lamarck, 1822 accepted as Philippia lutea (Lamarck, 1822) (unaccepted > superseded combination)
19. Species Solarium mediterraneum Monterosato, 1872 accepted as Basisulcata lepida (C. Bayer, 1942) (junior homonym)
20. Species Solarium ordinarium E. A. Smith, 1890 accepted as Architectonica nobilis Röding, 1798
21. Species Solarium peracutum Dall, 1889 accepted as Discotectonica discus (R. A. Philippi, 1844) (synonym)
22. Species Solarium perspectiviforme Tiberi, 1872 accepted as Basisulcata lepida (C. Bayer, 1942) (dubious synonym)
23. Species Solarium philippii Cantraine, 1842 accepted as Circulus striatus (R. A. Philippi, 1836)
24. Species Solarium pulchellum Tiberi, 1868 accepted as Basisulcata lepida (C. Bayer, 1942) (junior homonym)
25. Species Solarium quadriceps Hinds, 1844 accepted as Architectonica nobilis Röding, 1798 (unaccepted > junior subjective synonym)
26. Species Solarium reticulatum R. A. Philippi, 1844 † accepted as Ancistrobasis reticulata (R. A. Philippi, 1844) (unaccepted > superseded combination)
27. Species Solarium soverbii Hanley, 1862 accepted as Pseudotorinia architae (O. G. Costa, 1841) (unaccepted > junior subjective synonym)
28. Species Solarium spencerii E. Allen, 1856 accepted as Heliacus fallaciosus (Tiberi, 1872) (dubious synonym)
29. Species Solarium stramineum (Gmelin, 1791) sensu R. A. Philippi, 1836 accepted as Heliacus fallaciosus (Tiberi, 1872) (unaccepted > misapplication)
30. Species Solarium sulcatum O. G. Costa, 1841 accepted as Basisulcata lepida (C. Bayer, 1942) (unaccepted > junior subjective synonym)
31. Species Solarium verrucosum R. A. Philippi, 1849 accepted as Architectonica nobilis Röding, 1798 (unaccepted > junior subjective synonym)

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