Heliacus madurensis (M.M. Schepman, 1909)
Architectonica mainwaringi (FOSSIL) L.R. Cox, 1930 †
Heliacus malani (P. Dautzenberg, 1910)
Architectonica marginalis (FOSSIL) G.P. Deshayes, 1863 †
Architectonica marginata (G.P. Deshayes, 1832 )
Granosolarium marwicki (FOSSIL) (R.S. Allan, 1926 †)
Eosolarium massei (FOSSIL) A.L. Chavan, 1947 †
Architectonica maxima R.A. Philippi, 1849
Heliacus mazatlanicus H.A. Pilsbry & H.N. Lowe,1932
Architectonica meekana (FOSSIL) W.M. Gabb †
Pseudotorinia melajoensis (FOSSIL) P.O. Jung, 1969 †
Architectonica micromphala (FOSSIL) (A.E.M. Cossmann& M.A. Peyrot, 1921 †)
Heliacus mighelsi (R.A. Philippi, 1853)
Solariaxis millegranum (FOSSIL) (J.B.P.A. Lamarck,1822 †)
Solariaxis millegranum subcanaliculatum (FOSSIL) (A.V.M.D. D'Orbigny,1852 †)
Granosolarium mirabile (M.M. Schepman, 1909)
Nipteraxis misera (FOSSIL) (F. Dujardin, 1837 †)
Architectonica modesta (R.A. Philippi, 1849)
Architectonica montense (FOSSIL) (Briart & Cornet,1887 †)
Architectonica narica (FOSSIL) E.W. Vredenburg, 1928 †
Architectonica neerlandica G. Spaink, 1968
Heliacus nereidis (R. Bieler, 1993)
Wangaloa ngaparaensis (FOSSIL) (H.H. Suter, 1917 †)
Discotectonica nipponica (J.T. Kuroda & T. Habe,1971)
Architectonica nitens (FOSSIL) Noetling, 1901 †
Architectonica nobilis P.F. Röding, 1798
Adelphotectonica nomotoi (S. Kosuge, 1979)
Solariaxis nomurai (FOSSIL) F.S. MacNeil, 1960 †
Architectonica nubila K.T. Menke, 1849
Discotectonica nuda (FOSSIL) M. Harzhauser, 2014 †
Pseudotorinia numulus (K.H. Barnard, 1963)
Pseudotorinia nupera (FOSSIL) (T.A. Conrad, 1834 †)
Pseudomalaxis obolos (K.H. Barnard, 1963)
Architectonica obolus (FOSSIL) J.F. Bayan, 1873 †
Architectonica obtusa (FOSSIL) (H.G. Bronn, 1831 †)