Gadila boissevainae (S.G.A. Jaeckel, 1932)
Siphonodentalium booceras (J.R. le B. Tomlin, 1926)
Gadila bordaensis (B.C. Cotton& F.C. Godfrey, 1940)
Gadila boucheti (M. Nicklés, 1979)
Gadila braziliensis (J. Henderson, 1920)
Siphonodentalium breve (FOSSIL) (G.P. Deshayes, 1861 †)
Gadila brycei K.L. Lamprell & J.M. Healy,1998
Gadila bushii (W.H. Dall, 1889)
Cadulus californicus H.A. Pilsbry & B. Sharp,1898
Cadulus campylus J.C. Melvill, 1906
Gadila carlessi K.L. Lamprell & J.M. Healy,1998
Polyschides carolinensis (K.J. Bush, 1885)
Cadulus caronensis (FOSSIL) W.C. Mansfield, 1925 †
Cadulus catharus J. Henderson, 1920
Polyschides cayrei V. Scarabino, 2008
Dischides celeciai V. Scarabino, 2008
Gadila celtica V. Scarabino & F. Scarabino,2011
Cadulus chuni S.G.A. Jaeckel, 1932
Cadulus clarae (FOSSIL) C.J. Maury, 1910 †
Gadila clavata (A.A. Gould, 1859)
Gadila cobbi K.L. Lamprell & J.M. Healy,1998
Cadulus colliverae K.L. Lamprell & J.M. Healy,1998
Siphonodentalium colubridens (R.B. Watson, 1879)
Cadulus congruens R.B. Watson, 1879
Cadulus conradi (FOSSIL) H.A. Pilsbry& A. Harbison, 1933 †
Siphonodentalium coronatum V. Scarabino & F. Scarabino,2011
Cadulus corpulentus (FOSSIL) Meyer, 1886 †
Gadila cretea V. Scarabino & F. Scarabino,2011
Cadulus cucurbitus W.H. Dall, 1881
Cadulus curtus R.B. Watson, 1879
Polyschides cuspidatus (M. Nicklés, 1979)
Cadulus cyathoides S.G.A. Jaeckel, 1932
Gadila cylindrata (J.G. Jeffreys, 1877)
Cadulus cylindratus J.G. Jeffreys, 1877
Siphonodentalium dalli (H.A. Pilsbry & B. Sharp,1898)