Coelatura monceti (J.R. Bourguignat, 1883) Kenya26 mm
Elliptio monroensis I. Lea, 1843 Florida46 mm
Psoronaias morini (P.M.A. Morelet, 1851) Guatemala
Coelatura mossambicensis (E.C. Von Martens, 1860) Malawi
Radiatula mouhoti Vikhrev, Bolotov& Konopleva, 2017
Pseudodon mouhoti I. Lea, 1863 Vietnam52 mm
Harmandia munensis R.A.M. Brandt, 1974 Thailand, Mun River
Ptychorhynchus murinum (P.M. Heude, 1883) China, Zhejiang
Nitia mutelaeformis (J. Germain, 1906) Tchad, Lake Tchad
Mweruella mweruensis (E.A. Smith, 1908) Colombia41 mm
Hyriopsis myersiana I. Lea, 1856 Western of Thailand93 mm
Pseudodon nankingensis (P.M. Heude, 1874) China, Nanking
Lamprotula nanningensis Z.X. Qian,Y. Fang & He, 2015
Lamellidens narainporensis H.B. Preston, 1912 Bangladesh, Dacca
Ligumia nasuta (T. Say, 1817) Alabama53 mm
Unio natosini (FOSSIL) McLearn, 1929 †
Villosa nebulosa (T.A. Conrad, 1834) Alabama42 mm
Amblema neislerii I. Lea, 1858 Georgia, Bryan County
Solenaia neotriangularis J. He & Z. Zhuang, 2013
Magnonaias nervosa (C.S. Rafinesque, 1820) Tennessee148,5 mm
Trapezoideus nesemanni Konopleva, Vikhrev& Bolotov, 2017
Pachynaias nicaraguensis (I. Lea, 1868) Nicaragua
Magnonaias nickliniana (I. Lea, 1834) Honduras
Schepmania nieuwenhuisi (M.M. Schepman, 1898) Borneo, Gomantong
Elliptio nigella I. Lea, 1852 Florida, Orange County
Quadrula nobilis (T.A. Conrad, 1854) USA, Louisiana64 mm
Amphinaias nodulata (C.S. Rafinesque, 1820) Arkansas59 mm
Lamprotula nodulosa (W. Wood, 1815) Vietnam, Lang Son
Disconaias novileonis (H.A. Pilsbry, 1910) Mexico, San Luis Potosì
Unio nubianus (FOSSIL) Cox, 1955 † Egypt, Aswan69 mm
Scabies nucleus (I. Lea, 1856) Thailand15,55 mm
Radiatula nuttalliana (I. Lea, 1856) India, Cuddalore
Anodonta nuttalliana (I. Lea, 1838) Utah, Utah Lake
Nyassunio nyassaensis (I. Lea, 1864) Malawi26,84 mm
Trapezidens obesa Kondakov, Konopleva& Vikhrev, 2017