Zeacolpus fyfei (FOSSIL) J. Marwick, 1931 †
Turritella gabrielensis (FOSSIL) Clark & J.W. Durham,1946 †
Zeacolpus gagei (FOSSIL) J. Marwick, 1971 †
Colposigma gairi (FOSSIL) J. Marwick, 1960 †
Turritella galliculus (FOSSIL) P.D. Montfort, 1810 †
Turritella galvesia (FOSSIL) A.A. Olsson, 1931 †
Turritella gatunensis (FOSSIL) T.A. Conrad, 1857 †
Turritella gemmata (L.A. Reeve, 1849)
Colpospira gemmulata (FOSSIL) (R. Tate, 1893 †)
Mesalia gigantia (FOSSIL) Awad & Abed, 1967 †
Turritella gilbertharrisi (FOSSIL) F. Hodson, 1926 †
Tropicolpus gittosinus (FOSSIL) (Powell & J.A. Bartrum,1929 †)
Turritella gladeensis (FOSSIL) (W.C. Mansfield, 1931 †)
Turritella goettentrupensis (FOSSIL) (A.E.M. Cossmann, 1899 †)
Turritella goldfusii (FOSSIL) Klipstein, 1843 †
Turritella gonisotoma (FOSSIL) A. Valenciennes, 1833 †
Turritella gonostoma A. Valenciennes, 1832
Turritella gothica (FOSSIL) Grzybowski, 1899 †
Callostracum gracile (H. von Maltzan, 1883)
Turritella gradata (FOSSIL) K.T. Menke, 1856 †
Torquesia granulata (FOSSIL) (Sowerby, 1827 †)
Zeacolpus greggi (FOSSIL) J. Marwick, 1971 †
Gazameda grindleyi (FOSSIL) (J. Marwick, 1971 †)
Colpospira guillaumei T. Iredale, 1924
Gazameda gunnii (L.A. Reeve, 1849)
Turritella guppyi (FOSSIL) A.E.M. Cossmann, 1909 †
Turritella halensis (FOSSIL) W.H. Dall, 1916 †
Turritella hallii (FOSSIL) R. Tate, 1900 †
Sigmesalia hamiltoni (FOSSIL) (G.P. Deshayes, 1861 †)
Stiracolpus harnaiensis (FOSSIL) Cox, 1931 †
Tropicolpus harringtoni (FOSSIL) J. Marwick, 1971 †
Turritella harrisoni (FOSSIL) Cox, 1936 †
Turritella harveyensis (FOSSIL) (W.C. Mansfield, 1930 †)
Torquesia hassani (FOSSIL) Abbass, 1962 †
Turritella hastula L.A. Reeve, 1849