Mesanella nigricans (O.F. von Möllendorff,1900)
Chrysallis nigriceps P. Bartsch Philippines, Mindoro64 mm
Aegista nikkoensis J.T. Kuroda, 1934 Japan
Helicostyla nimbosa W.J. Broderip, 1841 Philippines, Panay Island53 mm
Helicostyla nimbosa antiqua (P. Bartsch, 1919) Philippines
Euhadra nipponensis (W. Kobelt, 1876)
Trishoplita nitens H.A. Pilsbry & Y. Hirase,1904 Japan, Kagoshima
Calocochlia norrisii (G.B. I Sowerby, 1842) Philippines, Cebu51 mm
Aegista nunobikiensis H. OgaItô & E. Sorita,1981 Japan, Hyogo
Phoenicobius oblongus (G.B. I Sowerby, 1841)
Metodontia obstructa (P.M. Heude, 1882) Hanzhong, Shanxi Province, China8,2 mm
Aegista oculus (L. Pfeiffer, 1850) Japan, Miyako Island
Laeocathaica odophora O.F. von Möllendorff,1899 China, Gansu Province15,54 mm
Cathaica ohlmeri A. Andreae, 1903 Hanzhong, Shanxi Province, China10,3 mm
Helicostyla okadai J.T. Kuroda, 1932 Taiwan24,9 mm
Trishoplita okinoshimae H.A. Pilsbry, 1902 Japan
Aegista omiensis H.A. Pilsbry, 1902 Japan, Shiga
Aegista omma (H.A. Pilsbry& Y. Hirase, 1904) Japan
Nesiohelix omphalina (Y. Hirase, 1915) Okinawa25 mm
Nesiohelix omphalina bipyramidalis J.T. Kuroda & S. Emura,1943 Japan
Phoenicobius oomorphus (G.B. I Sowerby, 1841) Philippines, Mindoro30 mm
Phengus opalina (G.B. I Sowerby, 1841) Philippines, Batanes Island46,6 mm
Trishoplita optima H.A. Pilsbry, 1902 Japan, Tokushima
Helicostyla orbitula G.B. I Sowerby, 1841 Philippines, Mindoro Island31 mm
Pliocathaica orithyia (FOSSIL) (Von Martens, 1879 †) China, Shanxi, Xinzhou
Aegista osbeckii (R.A. Philippi, 1847) Okinawa16 mm
Euhadra oshimae (H.A. Pilsbry, 1901)
Nesiohelix oshiroi T. Habe & M. Chinen, 1980 Japan
Trishoplita ottoi H.A. Pilsbry, 1901 South Korea
Canistrum ovoideum (G.B. I Sowerby, 1833) Philippines, Masbate Island43 mm
Canistrum ovoideum euryzonum (L. Pfeiffer, 1847) Philippines, Masbate Island43,9 mm
Canistrum ovoideum luzonicum (G.B. I Sowerby, 1833) Philippines, Masbate Island41 mm
Euhadra pachya H.A. Pilsbry, 1902 Japan, Kagoshima
Aegista packhaensis (A.R.J.B. Bavay& P. Dautzenberg, 1908) Vietnam, Pa Khà
Nesiohelix palaeomphalina M. Azuma, 1983 Japan