Megayoldia martyria W.H. Dall, 1897
Yoldia mater (FOSSIL) Meyer, 1885 †
Sachalinella matschigarica (FOSSIL) (L. Krishtofovich,1964 †)
Yoldia mcconnelli (FOSSIL) H.D. Russell & Landes,1937 †
Yoldia microdonta (FOSSIL) Meek 1871 †
Yoldia micrometrica G. Seguenza, 1877
Yoldia minima G. Seguenza, 1877
Yoldiella minuscula A.E. Verrill & K.J. Bush,1897
Yoldiella minuta (J.A. Allen, A. Sanders& G. Hannah, 1995)
Microgloma mirmidina (P. Dautzenberg& H. Fischer, 1897)
Yoldiella mohakana (FOSSIL) (J. Marwick, 1965 †)
Megayoldia montereyensis (W.H. Dall, 1893)
Yoldia mortuasusensis (FOSSIL) Clark & Woodford, 1927 †
Yoldia mosesi (FOSSIL) E.G. Bryant& K.V.W. Palmer, 1923 †
Yoldia multiconcentrica (FOSSIL) B. Wade, 1926 †
Yoldia myalis (J.P.Y. Couthouy, 1838)
Cnesterium nabiliana (FOSSIL) (Simonova, 1937 †)
Sachalinella nairoensis (FOSSIL) (Evseev, 1964 †)
Yoldiella nana (Sars, 1865)
Yoldiella nanula (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Yoldia narthecia (C. Hedley, 1915)
Yoldia navicula L.S. Zhidkova, 1980
Microgloma nhanduti N.P. Benaim & R.S. Absalão,2011
Scissileda nicobarica (J.G. Bruguière, 1789)
Yoldiella nielseni (FOSSIL) Schnetler, 2001 †
Yoldia nitida (FOSSIL) (G.B. Brocchi, 1814 †)
Yoldia notabilis M. Yokoyama, 1922
Yoldiella obesa (W. Stimpson, 1851)
Portlandia obliquistriata (FOSSIL) (K. Amano, 1957 †)
Yoldiella oblonga (J.P.L. Pelseneer, 1903)
Mirayoldia oblukovinensis (FOSSIL) Krishtofovich & Pronina,1973 †
Yoldia obsoleta (FOSSIL) Konova, 1984 †
Yoldiella olutoroensis O.A. Scarlato, 1981
Yoldiella orbicularis O.A. Scarlato, 1981
Yoldiella orcia (W.H. Dall, 1916)