Pusula lindajoyceae (FOSSIL) E.J. Petuch, 1994 †
Trivellona litolabra Fehse, 2017
Triviella lorenzi D. Fehse, 2016
Triviella lowtheri M. Beals, 2008
Niveria macaeica (D. Fehse & J. Grego,2005)
Alaerato mactanica (T. Cossignani& V. Cossignani, 1997)
Trivirostra mactanica D. Fehse & J. Grego, 2002
Trivia madagascariensis H.A. Pilsbry, 1895
Triviella magnidentata (W. Liltved, 1986)
Niveria maltbiana (J.S. Schwengel& J.T.L. McGinty, 1942)
Dolichupis malvabasis L. Dolin, 2001
Hespererato marginata (O.A.L. Mörch, 1860)
Gregoia mariecatherinae D. Fehse, 2015
Trivellona marlowi (G. Rosenberg& H.E. Finley, 2001)
Erato marshalli (FOSSIL) J. Marwick, 1929 †
Hespererato martinicensis F.A. Schilder, 1933
Triviella martybealsi D. Fehse, 2016
Triviella massieri (P. Martin & G.T. Poppe,1991)
Trivirostra matavai D. Fehse & J. Grego, 2013
Hespererato maugeriae (J.E. Gray, 1832)
Niveria maugeriae (G.B. II Sowerby, 1832)
Gregoia mauricetteae D. Fehse, 2015
Dolichupis mediagibber D. Fehse & J. Grego, 2010
Trivia mediterranea (A. Risso, 1826)
Ellatrivia merces (T. Iredale, 1924)
Ellatrivia merces memorata (H.J. Finlay, 1927)
Dolichupis meridionalis (C.N. Cate, 1979)
Trivia merlini D. Fehse & Van de Haar,2015
Pusula miamiensis (FOSSIL) E.J. Petuch, 1991 †
Pusula miccosukee (E.J. Petuch, 1991)
Trivia michelottii (FOSSIL) G.F. Dollfus& P. Dautzenberg, 1886 †
Triviella millardi (C.N. Cate, 1979)
Novatrivia mirabilis D. Fehse, 2015
Trivia monacha (da Costa, 1778)
Triviella montorum D. Fehse, 2016