1. Species Oospira (Formosana) albiapex (K.-M. Chang & Ookubo, 1994) accepted as Formosana albiapex K.-M. Chang & Ookubo, 1994 (unaccepted combination)
2. Species Oospira (Formosana) antilopina (Heude, 1885) accepted as Formosana antilopina (Heude, 1885) (unaccepted > superseded combination)
3. Species Oospira (Formosana) artifina (Heude, 1885) accepted as Formosana artifina (Heude, 1885) (unaccepted combination)
4. Species Oospira (Formosana) coudeini (Bavay & Dautzenberg, 1899) accepted as Formosana coudeini (Bavay & Dautzenberg, 1899) (unaccepted combination)
5. Species Oospira (Formosana) dextrogyra (Bavay & Dautzenberg, 1909) accepted as Formosana dextrogyra (Bavay & Dautzenberg, 1909)
6. Species Oospira (Formosana) elegans H. Nordsieck, 2012 accepted as Formosana elegans (H. Nordsieck, 2012) (original combination)
7. Species Oospira (Formosana) formosensis (H. Adams, 1866) accepted as Formosana formosensis (H. Adams, 1866) (unaccepted > superseded combination)
8. Species Oospira (Formosana) friniana (Heude, 1890) accepted as Formosanella friniana (Heude, 1890) (unaccepted combination)
9. Species Oospira (Formosana) goniostoma H. Nordsieck, 2016 accepted as Formosana goniostoma (H. Nordsieck, 2016)
10. Species Oospira (Formosana) kiangshiensis (Gredler, 1892) accepted as Formosana kiangshiensis (Gredler, 1892) (unaccepted combination)
11. Species Oospira (Formosana) kongshanensis H. Nordsieck, 2007 accepted as Formosana kongshanensis (H. Nordsieck, 2007) (original combination)
12. Species Oospira (Formosana) lingchuanensis (K.-M. Chang, 1989) accepted as Formosana lingchuanensis K.-M. Chang, 1989 (unaccepted combination)
13. Species Oospira (Formosana) liujinae Maassen, 2008 accepted as Formosana libonensis liujinae (Maassen, 2008) (basionym)
14. Species Oospira (Formosana) magnaciana (Heude, 1882) accepted as Formosana magnaciana (Heude, 1882) (unaccepted combination)
15. Species Oospira (Formosana) malleolata H. Nordsieck, 2012 accepted as Formosana malleolata (H. Nordsieck, 2012) (unaccepted > superseded combination)
16. Species Oospira (Formosana) moschina (Gredler, 1888) accepted as Formosana moschina (Gredler, 1888) (unaccepted combination)
17. Species Oospira (Formosana) moschinella H. Nordsieck, 2007 accepted as Formosana moschinella (H. Nordsieck, 2007) (original combination)
18. Species Oospira (Formosana) ooharai H. Nordsieck, 2007 accepted as Formosana ooharai (H. Nordsieck, 2007) (original combination)
19. Species Oospira (Formosana) pacifica (Gredler, 1884) accepted as Formosana pacifica (Gredler, 1884) (unaccepted combination)
20. Species Oospira (Formosana) psilodonta (Heude, 1889) accepted as Formosana psilodonta (Heude, 1889) (unaccepted combination)
21. Species Oospira (Formosana) schawalleri H. Nordsieck, 2001 accepted as Formosana schawalleri (H. Nordsieck, 2001) (unaccepted combination)
22. Species Oospira (Formosana) semprinii (Gredler, 1884) accepted as Formosana semprinii (Gredler, 1884) (unaccepted combination)
23. Species Oospira (Formosana) splendens H. Nordsieck, 2005 accepted as Formosana splendens (H. Nordsieck, 2005) (unaccepted > superseded combination)
24. Species Oospira (Formosana) swinhoei (L. Pfeiffer, 1866) accepted as Formosana swinhoei (L. Pfeiffer, 1866) (unaccepted combination)
25. Species Oospira (Formosana) taiwanica (Pilsbry, 1909) accepted as Formosana taiwanica (Pilsbry, 1909) (unaccepted combination)
26. Species Oospira (Formosana) telum H. Nordsieck, 2003 accepted as Formosana telum (H. Nordsieck, 2003) (unaccepted combination)
27. Species Oospira (Formosana) umbrosa H. Nordsieck, 2007 accepted as Formosana umbrosa (H. Nordsieck, 2007) (original combination)

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