Mastoniaeforis insulana (C.F. Laseron, 1958) New Caledonia
Opimaphora integra C.F. Laseron, 1958 Queensland
Viriola intercalaris (A.A. Gould, 1861)
Inella intercalaris B.A. Marshall, 1983 Japan
Viriola interfilata (A.A. Gould, 1861) French Polynesia, Topatii8,9 mm
Viriola intergranosa (R.P.J. Hervier, 1898) New Caledonia, Lifou5,9 mm
Similiphora intermedia (C.B. Adams, 1850) USA, Louisiana
Inella intermedia (W.H. Dall, 1881)
Cautor intermissus (C.F. Laseron, 1958) Hawaii
Mastonia interpicta F.P. Jousseaume, 1898 Réunion
Triphora interpres J.C. Melvill, 1918
Monophorus invectus (FOSSIL) M. Harzhauser, 2014 † India
Viriola iredalei (C.F. Laseron, 1958)
Mastonia iris C.F. Laseron, 1958 Queensland
Euthymella isaotakii S. Kosuge, 1962 Hawaii6 mm
Aclophora islandica C.F. Laseron, 1958 Queensland
Triphora isleana C. Vélain, 1878 Saint Paul Island8,6 mm
Mastonia issa F.P. Jousseaume, 1898 Djibouti
Monophorus iwaotakii (S. Kosuge, 1963) Japan
Inella japonica J.T. Kuroda & T. Habe,1963 Japan, Izu peninsula
Cautotriphora jazwinskii S. Kosuge, 1990 Marshall Islands, Kwajalein Atoll7,3 mm
Triphora johnstoni F. Baker, 1926 West America
Mastoniaeforis jousseaumei (R.P.J. Hervier, 1898) New Caledonia, Lifou5 mm
Nototriphora kaawaensis (FOSSIL) (C.R. Laws, 1940 †) New Zealand
Subulophora kanaina (F.P. Jousseaume, 1884)
Triphora keiki E.A. Kay, 1979 Hawaii8 mm
Metaxia kermadecensis B.A. Marshall, 1977 New Zealand, Kermadec Islands
Aclophora kerslakei C.F. Laseron, 1958 Queensland
Latitriphora kesteveni (C. Hedley, 1903) Australia, Sydney
Inella kimblae B.A. Marshall, 1983 New South Wales
Euthymella kosugei B.A. Marshall, 1983 New South Wales
Viriola kosugei C.K. Chang & Wu, 2005
Litharium kurodai (S. Kosuge, 1962) Indo-Pacific
Cheirodonta labiata (A. Adams, 1854) Australia, Sydney
Triphora laddi E.A. Kay, 1979 Hawaii2 mm