Oospira cornea (H.C. Küster, 1844)
Elia corpulenta (L. Pfeiffer, 1848) Turkey, Istanbul12 mm
Albinaria corrugata (J.G. Bruguière, 1792) Greece, Crete Island20 mm
Albinaria corrugata doerfleri A.J. Wagner, 1924 Greece, Crete Island
Albinaria corrugata draparnaudi (H.H. Beck, 1837) Greece16 mm
Albinaria corrugata inflata (G.A. Olivier, 1801) Greece, Crete Island23 mm
Albinaria corrugata purpurea N. Reitsma, 1988 Greece, Crete Island18,1 mm
Albinaria corrugata turgida (A.J. Wagner, 1924) Greece16 mm
Renschiphaedusa corticina (L. Pfeiffer, 1842) Indonesia, Sumatra25 mm
Neostyriaca corynodes (F. Held, 1836) Switzerland13 mm
Neostyriaca corynodes brandti M. Klemm, 1969 Austria11,2 mm
Neostyriaca corynodes evadens M. Klemm, 1969 Austria10 mm
Neostyriaca corynodes saxatilis (J.D.W. Hartmann, 1844) Austria10 mm
Neostyriaca corynodes styriaca (A. Schmidt, 1856) Austria12,2 mm
Neniopsis cossmanni H. Nordsieck, 2002 France, Chenay16,6 mm
Mauritanica cossoni A. Letourneux, 1887 Tunisia19 mm
Stabilea costata (C. Pfeiffer, 1828) Austria16,5 mm
Stabilea costata commutata (E.A. Rossmässler, 1836) Italy North
Stabilea costata curta (E.A. Rossmässler, 1836) Croatia
Stabilea costata franconica P. Ehrmann, 1933 Germany17,8 mm
Stabilea costata fusca (F.E. De Betta, 1855) Italy18,8 mm
Stabilea costata intermedia (L. Pfeiffer, 1847) Slovenia17,6 mm
Stabilea costata psila (C.A. Westerlund, 1884) Italy13,2 mm
Stabilea costata silesiaca (A. Schmidt, 1868) Czech Republic14,8 mm
Stabilea costata subcostata (O. Böttger, 1879) Croatia12,6 mm
Stabilea costata ungulata (E.A. Rossmässler, 1838) Slovenia16,4 mm
Balea costellata (N.H. Odhner, 1960)
Thaumatoptyx costellata H. Nordsieck, 2005 Taiwan
Omanillya costellata (FOSSIL) H. Nordsieck, 2015 † Oman
Euphaedusa costifera H. Nordsieck, 2001
Stereophaedusa costifera J.T. Kuroda & Is. Taki,1944 Japan, Hiroshima25,4 mm
Balea costigera (N.H. Odhner, 1960)
Oospira coudeini A.R.J.B. Bavay& P. Dautzenberg, 1899 Vietnam, Lang-Son29 mm
Columbinia cousini (F.P. Jousseaume, 1900) Ecuador22,6 mm
Siciliaria crassicostata (L. Pfeiffer, 1856) Italy, Sicily Island21 mm