1. Species Helix (Isomeria) equestrata Germain, 1907 accepted as Isomeria globosa (Broderip, 1832) (not J. Moricand, 1858)
2. Species Helix (Isomeria) faunus R. A. Philippi, 1851 accepted as Isomeria faunus (R. A. Philippi, 1851) (unaccepted > superseded combination)
3. Species Helix (Isomeria) fordiana Pilsbry, 1889 accepted as Isomeria fordiana (Pilsbry, 1889) (original combination)
4. Species Helix (Isomeria) gealei E. A. Smith, 1877 accepted as Isomeria gealei (E. A. Smith, 1877) (original combination)
5. Species Helix (Isomeria) granulatissima K. Miller, 1878 accepted as Isomeria kolbergi (K. Miller, 1878) (unaccepted > junior subjective synonym)
6. Species Helix (Isomeria) kolbergi K. Miller, 1878 accepted as Isomeria kolbergi (K. Miller, 1878) (original combination)
7. Species Helix (Isomeria) loxensis K. Miller, 1879 accepted as Isomeria hartwegi (L. Pfeiffer, 1846) (unaccepted > junior subjective synonym)
8. Species Helix (Isomeria) meyeri Kobelt, 1894 accepted as Isomeria meyeri (Kobelt, 1894) (original combination)
9. Species Helix (Isomeria) parietidentata K. Miller, 1878 accepted as Isomeria cymatodes (L. Pfeiffer, 1852) (unaccepted > junior subjective synonym)
10. Species Helix (Isomeria) peritropis Pilsbry, 1889 accepted as Isomeria continua (Reeve, 1854) (junior synonym)
11. Species Helix (Isomeria) stoltzmanni Lubomirski, 1880 accepted as Isomeria stoltzmanni (Lubomirski, 1880) (original name)
12. Species Helix (Isomeria) wolfi Reibisch, 1896 accepted as Isomeria aequatoriana (Hidalgo, 1867) (junior synonym)
13. Species Helix (Isomeria) scalena E. von Martens, 1885 represented as Isomeria scalena (E. von Martens, 1885)

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