• Maurimia Martins-Neto, 2001 †
• Mericia Robineau-Desvoidy, 1830 (uncertain > nomen dubium)
• Meridia Roewer, 1913
• Merilia Lacordaire, 1848
• Merimea Cambessèdes in A.F.C. Saint-Hilaire, 1829 (uncertain)
• Merimna Saunders, 1868
• Merimna Thomson, 1878
• Merinia Newton & Chandler, 1989
• Merismia Van Tieghem, 1895 accepted as Psittacanthus C.F.P. Martius, 1830
• Merlinia Fortey & Owens, 1978 †
• Mermiria Stål, 1873
• Merremia Berg, 1901 (uncertain) [Family: Elapidae]
• Merremia Dennstedt ex Endlicher, 1841 [Family: Convolvulaceae]
• Merretia Solander ex N.L. Marchand, 1869 (uncertain)
• Merria Gray in Beechey, 1839 accepted as Vanikoro Quoy & Gaimard, 1832
• Merriamia Boulenger, 1904 †
• Merriamina Jordan & Gilbert, 1919 † (uncertain)
• Merrillia Swingle, 1919
• Merrittia E.D. Merrill, 1910
• Merriwa Dodd, 1919 (uncertain)
• Mervicia Bole, 1968 (uncertain)
• Meximia Pascoe, 1865
• Murramia Harris, 1994 accepted as Porcellidium Claus, 1860