Yoldiella cecinella (W.H. Dall, 1916)
Yoldia chejsliensis (FOSSIL) Y.B. Gladenkov, 1990 †
Yoldiella chilenica (W.H. Dall, 1908)
Yoldia chojensis (FOSSIL) Simonova, 1941 †
Orthoyoldia claibornensis (FOSSIL) (T.A. Conrad, 1848 †)
Scissileda clara (J.C. Melvill, 1898)
Yoldiella clarkei J. Knudsen, 1970
Yoldia clydaniona (FOSSIL) D.T. Dockery, 1982 †
Yoldia clydoniona (FOSSIL) D.T. Dockery, 1982 †
Scissileda crassicardo R.N. Kilburn, 1994
Orthoyoldia crosbyana (R.J.L. Guppy, 1882)
Portlandia cuneistriata (FOSSIL) M. Ichikawa & K. Maeda,1958 †
Yoldiella cuniculi (FOSSIL) (J. Marwick, 1965 †)
Yoldia cupressensis (FOSSIL) H.D. Russell & Landes,1937 †
Yoldiella curta A.E. Verrill & K.J. Bush,1898
Yoldiella curupira N.P. Benaim & R.S. Absalão,2011
Yoldiella dautzenbergi R. La Perna, 2008
Portlandia decipiens E.A. Smith, 1885
Yoldia defossata (FOSSIL) Quilty & al., 2016 †
Yoldiella derjugini O.A. Scarlato, 1981
Portlandia deshayesiana (FOSSIL) (P. Nyst, 1835 †)
Yoldiella despecta (E.A. Smith, 1885)
Yoldiella dissimilis A.E. Verrill & K.J. Bush,1898
Scissileda divaricata (N.H. Odhner, 1919)
Yoldia djakovi (FOSSIL) Slodkewitsch, 1938 †
Yoldia dowlingi (FOSSIL) H.D. Russell & Landes,1937 †
Yoldia duprei (FOSSIL) C.S. Weaver& K.V.W. Palmer, 1922 †
Yoldiella ecaudata (J.P.L. Pelseneer, 1903)
Yoldia eightsii (J.C. Jay, 1839)
Yoldiella ella J.A. Allen, A. Sanders& G. Hannah, 1995
Yoldiella enata J.A. Allen, A. Sanders& G. Hannah, 1995
Yoldia enemtensis (FOSSIL) Y.B. Gladenkov, 1979 †
Yoldia epilongissima (FOSSIL) Y.B. Gladenkov, 1972 †
Cnesterium ermanensis (FOSSIL) Y.B. Gladenkov, 1976 †
Yoldia evansi (FOSSIL) F.B. Meek & Hayden,1857 †