Tachyrhynchus lacteolus (P.P. Carpenter, 1864) Alaska
Turritella lagunillasensis (FOSSIL) Rivera, 1957 † Peru, Ica, Ica
Turritella lahirii (FOSSIL) Cox, 1930 † Pakistan, N.W.F.P., Kohat
Turritella landbecki (FOSSIL) R.A. Philippi, 1887 † Chile, Navidad Formation51 mm
Turritella larensis (FOSSIL) F. Hodson, 1926 † Colombia, La Guajira, Uribia
Turritella latior K.H.J. Thiele, 1912
Omalaxis laudunensis (FOSSIL) (J.L.M. Defrance, 1828 †) France, Paris Basin
Zeacolpus lawsi (FOSSIL) J. Marwick, 1971 † New Zealand
Turritella leeuwinensis (T.A. Garrard, 1972) Australia, Leeuwin
Turritella lentiginosa L.A. Reeve, 1849 Ecuador103,6 mm
Turritella leonensis (FOSSIL) T.A. Conrad, 1857 † Texas, Hudspeth County
Incatella leptogramma (FOSSIL) (R.A. Philippi, 1887 †) Chile, Navidad Formation20,4 mm
Turritella leucostoma A. Valenciennes, 1832 West Panama123 mm
Turritella ligar G.P. Deshayes, 1843 Guinea123 mm
Mesalia lincolnensis (FOSSIL) C.S. Weaver, 1916 †
Turritella lindae (E.J. Petuch, 1987)
Mariacolpus lindajoyceae (FOSSIL) E.J. Petuch, 2004 † Maryland, St. Marys County37 mm
Turritella listrota (FOSSIL) W.P. Woodring, 1959 † Panama, Colón
Turritella lloydsmithi (FOSSIL) H.A. Pilsbry& J. Brown, 1917 † Colombia, La Chorrera
Turritella lorenzana (FOSSIL) Wagner & Schilling,1923 † USA, California, Kern
Zeacolpus lornensis (FOSSIL) (J. Marwick, 1926 †)
Laxispira lumbricalis (FOSSIL) W.M. Gabb, 1877 † Tennessee
Vermicularia lumbricalis (C. Linnaeus, 1758) Costa Rica
Zeacolpus luteolapis (FOSSIL) (J. Marwick, 1931 †)
Turritella lyonsi E.F. Garcia, 2006 Mexico, Campeche17,8 mm
Turritella machapoorensis (FOSSIL) C.J. Maury, 1925 † Venezuela, Paraguana Peninsula
Tropicolpus mackellari (FOSSIL) J. Marwick, 1971 †
Turritella maculata L.A. Reeve, 1849 Papua New Guinea60 mm
Gazameda madagascariensis L. Bozzetti, 2008 Madagascar, Lavanono22,2 mm
Peyrotia magnasperula (FOSSIL) (F. Sacco, 1895 †) Myanmar, Mandalay, Myingyan
Turritella magnasulcus (E.J. Petuch, 1991) Florida113 mm
Torquesia mahmoudi (FOSSIL) Abbass, 1967 † Egypt, Suhaj, Sawhaj
Broderiptella mansfieldi (FOSSIL) A.A. Olsson, 1967 † Florida, Miami County
Vermicularia maoriana A.W.B. Powell, 1937 New Zealand
Turritella mariana W.H. Dall, 1908 Panama West37 mm