Cavellioropa cookiana (R.K. Dell, 1952)
Allodiscus cooperi H.H. Suter, 1907
Pilula cordemoyi (G. Nevill, 1870)
Flammulina cornea F.W. Hutton, 1883
Paryphantopsis corolla J. Slapcinsky & R. Lasley,2007
Ngairea corticicola (J.C. Cox, 1866)
Flammulina corymbus (J.C.H. Crosse, 1874)
Palikirus cosmetus G.A. Solem, 1983
Flammocharopa costulata (F.W. Hutton, 1883)
Flammulina crebriflammis (L. Pfeiffer, 1853)
Thermia cressida (F.W. Hutton, 1883)
Alsolemia cresswelli (F.M. Climo, 1978)
Neoparyphantopsis crusoeana F.A.W. Miquel & J.F. Araya,2015
Allodiscus cryptobidens (H.H. Suter, 1891)
Flammoconcha cumberi (A.W.B. Powell, 1941)
Oreokera cumulus (N.H. Odhner, 1917)
Luinodiscus cupreus (J.C. Cox, 1868)
Roblinella curacoae (J.W. Brazier, 1871)
Gyrocochlea curtisiana (C. Hedley, 1912)
Luinodiscus cygnea (W.H. Benson, 1853)
Pillomena dandenongensis (W.F. Petterd, 1879)
Paryphantopsis dauloensis G.A. Solem, 1970
Therasia decidua (L. Pfeiffer, 1857)
Sinployea decorticata (A. Garrett, 1872)
Charopa decreta (J. Gassies, 1863)
Paracharopa delicatula F.M. Climo, 1983
Cavellia delli (F.M. Climo, 1969)
Hedleyoconcha delta (L. Pfeiffer, 1857)
Rotacharopa densilamellata J. Stanisic, 1990
Chaureopa depressa F.M. Climo, 1985
Pararhytida dictyodes (L. Pfeiffer, 1847)
Thryasona diemenensis (J.C. Cox, 1868)
Otoconcha dimidiata (L. Pfeiffer, 1853)
Allodiscus dimorphus (L. Pfeiffer, 1853)
Dentherona dispar (J.W. Brazier, 1871)