Caecum cooki M. Pizzini & B.K. Raines,2011
Caecum cooperi Smith, 1860
Meioceras cornucopiae P.P. Carpenter, 1859
Parastrophia cornucopiae (L. de Folin, 1869)
Strebloceras cornuoides (FOSSIL) H.F. Carpenter †
Caecum corrugatulum P.P. Carpenter, 1857
Caecum crassum L. de Folin, 1870
Caecum crebricinctum P.P. Carpenter, 1864
Caecum crispum A.E. Verrill & K.J. Bush,1900
Meioceras cubitatum L. de Folin, 1868
Caecum cuspidatum G.W. Chaster, 1896
Ctiloceras cyclicum (R.B. Watson, 1886)
Caecum cycloferum Folin, 1867
Parastrophia cygnicollis (C. Hedley, 1904)
Caecum dakuwaqa M. Pizzini, B.K. Raines& A. Vannozzi, 2013
Caecum dalli P. Bartsch, 1920
Caecum danielei M. Pizzini & B.K. Raines,2011
Caecum debile A.E. Verrill & K.J. Bush,1900
Caecum delicatulum A.E. Verrill & K.J. Bush,1900
Caecum derjugini A.N. Golikov, 1967
Caecum dextroversum P.P. Carpenter, 1857
Caecum digitulum C. Hedley, 1904
Caecum diminutum C.B. Adams, 1852
Caecum donmoorei H.J. Mitchell-Tapping,1979
Caecum eburneum C.B. Adams, 1852
Strebloceras edwardsi (FOSSIL) (Deshayes, 1861) †
Parastrophia elegans (L. de Folin, 1880)
Caecum elegantissimum P.P. Carpenter, 1859
Caecum eliezeri R.S. Absalão, 1997
Caecum elongatum P.P. Carpenter, 1857
Caecum engli I. Nofroni, M. Pizzini& M. Oliverio, 1997
Parastrophia erseusi R.N. Hughes, 1993
Caecum erucatum L. de Folin, 1867
Caecum eunoi I. Nofroni, M. Pizzini& M. Oliverio, 1997
Caecum exile L. de Folin, 1875