1. Species Gundlachia bakeri Pilsbry, 1914
2. Species Gundlachia crepidulina Guppy, 1872
3. Species Gundlachia hinkleyi B. Walker, 1917
4. Species Gundlachia hjalmarsoni L. Pfeiffer, 1858
5. Species Gundlachia hubendicki Brandt, 1974
6. Species Gundlachia leucaspis (Ancey, 1901)
7. Species Gundlachia lutzi B. Walker, 1925
8. Species Gundlachia radiata (Guilding, 1828)
9. Species Gundlachia saulcyana (Bourguignat, 1853)
10. Species Gundlachia textilis (Guppy, 1871)
11. Species Gundlachia ticaga (Ev. Marcus & Er. Marcus, 1962)
12. Subgenus Gundlachia (Kincaidilla) Hannibal, 1912 accepted as Ferrissia (Kincaidilla) Hannibal, 1912 represented as Ferrissia B. Walker, 1903 (original combination)
    1. Species Gundlachia (Kincaidilla) japonica J. B. Burch, 1964 accepted as Ferrissia californica (Rowell, 1863) (a junior synonym)
13. Species Gundlachia adelosia Bourguignat, 1862 accepted as Gundlachia ancyliformis L. Pfeiffer, 1849 accepted as Gundlachia radiata (Guilding, 1828) (original combination; junior synonym)
14. Species Gundlachia ancyliformis L. Pfeiffer, 1849 accepted as Gundlachia radiata (Guilding, 1828)
15. Species Gundlachia beddomei Petterd, 1888 accepted as Pettancylus petterdi (R. M. Johnston, 1879)
16. Species Gundlachia burnupi B. Walker, 1926 accepted as Ferrissia clifdeni Connolly, 1939 accepted as Pettancylus clifdeni (Connolly, 1939) (junior secondary homonym)
17. Species Gundlachia californica Rowell, 1863 accepted as Ferrissia californica (Rowell, 1863) (original combination)
18. Species Gundlachia concentrica (A. d'Orbigny, 1835) accepted as Uncancylus concentricus (A. d'Orbigny, 1835) (unaccepted > superseded combination)
19. Species Gundlachia dutrae S. B. Santos, 1994 accepted as Anisancylus dutrae (S. B. Santos, 1994) (original combination)
20. Species Gundlachia equeefensis (B. Walker, 1912) accepted as Pettancylus burnupi (B. Walker, 1912) (subjective synonym)
21. Species Gundlachia eremia Cotton & Godfrey, 1938 accepted as Pettancylus petterdi (R. M. Johnston, 1879)
22. Species Gundlachia farquhari B. Walker, 1924 accepted as Pettancylus farquhari (B. Walker, 1924) (unaccepted > superseded combination)
23. Species Gundlachia foncki (R. A. Philippi, 1866) accepted as Uncancylus foncki (R. A. Philippi, 1866) (unaccepted > superseded combination)
24. Species Gundlachia lhotelleriei B. Walker, 1914 accepted as Pettancylus lhotelleriei (B. Walker, 1914) (original combination)
25. Species Gundlachia lucasi Suter, 1905 accepted as Ferrissia dohrniana (Clessin, 1882)
26. Species Gundlachia meekiana W. Stimpson, 1863 accepted as Ferrissia fragilis (Tryon, 1863) accepted as Ferrissia californica (Rowell, 1863) (unaccepted > junior subjective synonym)
27. Species Gundlachia neozelanica Suter, 1905 accepted as Ferrissia neozelanica (Suter, 1905) (original combination)
28. Species Gundlachia nordenskioldi Pilsbry, 1924 accepted as Hebetancylus moricandi (A. d'Orbigny, 1838)
29. Species Gundlachia petterdi R. M. Johnston, 1879 accepted as Pettancylus petterdi (R. M. Johnston, 1879) (original combination)
30. Species Gundlachia poeyi Bourguignat, 1862 accepted as Gundlachia ancyliformis L. Pfeiffer, 1849 accepted as Gundlachia radiata (Guilding, 1828) (original combination; junior synonym)
31. Species Gundlachia stimpsoniana S. Smith, 1870 accepted as Ferrissia fragilis (Tryon, 1863) accepted as Ferrissia californica (Rowell, 1863) (junior synonym)

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