Turritella indenta (FOSSIL) T.A. Conrad, 1841 †
Turritella infans (FOSSIL) H.B. Stenzel, 1940 †
Turritella infracarinata (FOSSIL) Grzybowski, 1899 †
Turritella infraconstricta E.A. Smith, 1878
Turritella infralineata (FOSSIL) W.M. Gabb, 1864 †
Turritella innotabilis H.A. Pilsbry, 1897
Sigmesalia intermedia (FOSSIL) (G.P. Deshayes, 1832 †)
Oligodia intermedia (FOSSIL) (W.H. Dall, 1892 †)
Peyrotia interposita (FOSSIL) (G.P. Deshayes, 1861 †)
Turritella iota (FOSSIL) W.P. Popenoe, 1937 †
Gazameda iredalei Finlay, 1927
Turritella irrorata (FOSSIL) T.A. Conrad, 1855 †
Eurytorus jacula (FOSSIL) Gardner, 1947 †
Turritella javana (FOSSIL) Martin, 1882 †
Turritella jewetti P.P. Carpenter, 1864
Stiracolpus kaawaensis (FOSSIL) C.R. Laws, 1936 †
Turritella kachhensis (FOSSIL) E.W. Vredenburg, 1928 †
Turritella kaiseri (FOSSIL) Bohm, 1926 †
Zeacolpus kanieriensis (FOSSIL) (G.F. Harris, 1897 †)
Turritella kansasensis (FOSSIL) F.B. Meek, 1871 †
Turritella kayalensis (FOSSIL) A. Dey, 1961 †
Zeacolpus keari (FOSSIL) J. Marwick, 1971 †
Turritella kerrvillensis (FOSSIL) Stanton, 1947 †
Turritella keswickensis (FOSSIL) A.A. Olsson, 1928 †
Turritella kiiensis (FOSSIL) M. Yokoyama, 1929 †
Protoma knockeri W. Baird, 1870
Vermicularia knorrii (G.P. Deshayes, 1843)
Turritella knysnaensis C.F.F. von Krauss, 1848
Sigmesalia koeneni (FOSSIL) Renard, 1994 †
Gazameda kowiensis (G.B. III Sowerby, 1900)
Sigmesalia krachi (FOSSIL) F. Traub, 1979 †
Turritella kurosia K. Ida, 1952
Turritella kurosio K. Ida, 1952
Mesalia kushea (FOSSIL) Cataldo & Lazo, 2016 †
Palmerella kutchensis (FOSSIL) Halder & Sinha, 2014 †