1. Subgenus Cyclostomus (Cyclostoma) Draparnaud, 1801 accepted as Pomatias S. Studer, 1789
   1. Species Cyclostomus (Cyclostoma) brevimargo Mousson, 1882 accepted as Tropidophora tricarinata (O. F. Müller, 1774) (unaccepted > junior subjective synonym, original name)
   2. Species Cyclostomus (Cyclostoma) scalatus Mousson, 1882 accepted as Tropidophora tricarinata (O. F. Müller, 1774)
2. Subgenus Cyclostomus (Tropidophora) Troschel, 1847 accepted as Tropidophora Troschel, 1847 (unaccepted > superseded rank)
   1. Species Cyclostomus (Tropidophora) mauritianus H. Adams, 1867 accepted as Tropidophora mauritiana (H. Adams, 1867) (unaccepted > superseded combination)
   2. Species Cyclostomus (Tropidophora) pulcher (J. E. Gray, 1833) accepted as Cyclostoma pulchrum J. E. Gray, 1833 accepted as Tropidophora pulchra (J. E. Gray, 1833) (superseded combination; unjustified emendation to original name, Cyclostoma pulchrum Gray in Griffith & Pidgeon, 1833 )
3. Species Cyclostomus aminensis L. Pfeiffer, 1858 accepted as Colonina aminensis (L. Pfeiffer, 1858) (unaccepted > superseded combination, basionym)
4. Species Cyclostomus caspicus Mousson, 1876 accepted as Pomatias hyrcanum (E. von Martens, 1874) (unaccepted > junior subjective synonym)
5. Species Cyclostomus castaneus L. Pfeiffer, 1852 accepted as Tropidophora castanea (L. Pfeiffer, 1852) (unaccepted > superseded combination, basionym)
6. Species Cyclostomus consobrinus F. Sandberger, 1875 † accepted as Pomatias consobrinus (F. Sandberger, 1875) † (unaccepted > superseded combination)
7. Species Cyclostomus costulatus (Rossmässler, 1837) accepted as Pomatias rivularis (Eichwald, 1829) (junior synonym)
8. Species Cyclostomus dentilobatus Weinland, 1880 accepted as Colonina quaternata dentilobata (Weinland, 1880) (unaccepted > superseded combination)
9. Species Cyclostomus hartvigianus L. Pfeiffer, 1862 accepted as Tropidophora hartvigiana (L. Pfeiffer, 1862) (original combination)
10. Species Cyclostomus mauritianus H. Adams, 1867 accepted as Tropidophora mauritiana (H. Adams, 1867) (original combination)
11. Species Cyclostomus rectus L. Pfeiffer, 1863 accepted as Aguayotudora recta (L. Pfeiffer, 1863) (original combination)
12. Species Cyclostomus scaber H. Adams, 1867 accepted as Tropidophora scabra (H. Adams, 1867) (unaccepted > superseded combination)
13. Species Cyclostomus subpictus Sinzov, 1883 † accepted as Pomatias subpictus (Sinzov, 1883) † (unaccepted > superseded combination)
14. Species Cyclostomus suevicus F. Sandberger, 1875 † accepted as Procyclotopsis suevica (F. Sandberger, 1875) † (unaccepted > superseded combination)
15. Species Cyclostomus sulculosus L. Pfeiffer, 1852 accepted as Diplopoma sulculosum (L. Pfeiffer, 1852) (original combination)
16. Species Cyclostomus turgidulus F. Sandberger, 1872 † accepted as Pomatias turgidulus (F. Sandberger, 1872) † (unaccepted > superseded combination)
17. Species Cyclostomus ulmensis K. Miller, 1907 † accepted as Pomatias ulmensis (K. Miller, 1907) † (unaccepted > superseded combination)
18. Species Cyclostomus heynemanni L. Pfeiffer, 1846 (uncertain > taxon inquirendum)
19. Species Cyclostomus roemeri L. Pfeiffer, 1846 (uncertain > taxon inquirendum)

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