Coelatura monceti (J.R. Bourguignat, 1883)
Elliptio monroensis I. Lea, 1843
Psoronaias morini (P.M.A. Morelet, 1851)
Coelatura mossambicensis (E.C. Von Martens, 1860)
Radiatula mouhoti Vikhrev, Bolotov& Konopleva, 2017
Pseudodon mouhoti I. Lea, 1863
Harmandia munensis R.A.M. Brandt, 1974
Ptychorhynchus murinum (P.M. Heude, 1883)
Nitia mutelaeformis (J. Germain, 1906)
Mweruella mweruensis (E.A. Smith, 1908)
Hyriopsis myersiana I. Lea, 1856
Pseudodon nankingensis (P.M. Heude, 1874)
Lamprotula nanningensis Z.X. Qian,Y. Fang & He, 2015
Lamellidens narainporensis H.B. Preston, 1912
Ligumia nasuta (T. Say, 1817)
Unio natosini (FOSSIL) McLearn, 1929 †
Villosa nebulosa (T.A. Conrad, 1834)
Amblema neislerii I. Lea, 1858
Solenaia neotriangularis J. He & Z. Zhuang, 2013
Magnonaias nervosa (C.S. Rafinesque, 1820)
Trapezoideus nesemanni Konopleva, Vikhrev& Bolotov, 2017
Pachynaias nicaraguensis (I. Lea, 1868)
Magnonaias nickliniana (I. Lea, 1834)
Schepmania nieuwenhuisi (M.M. Schepman, 1898)
Elliptio nigella I. Lea, 1852
Quadrula nobilis (T.A. Conrad, 1854)
Amphinaias nodulata (C.S. Rafinesque, 1820)
Lamprotula nodulosa (W. Wood, 1815)
Disconaias novileonis (H.A. Pilsbry, 1910)
Unio nubianus (FOSSIL) Cox, 1955 †
Scabies nucleus (I. Lea, 1856)
Radiatula nuttalliana (I. Lea, 1856)
Anodonta nuttalliana (I. Lea, 1838)
Nyassunio nyassaensis (I. Lea, 1864)
Trapezidens obesa Kondakov, Konopleva& Vikhrev, 2017