Xeroleuca brulardi bergueroni (P.M. Pallary, 1918)
Xeroleuca brulardi claveli (P.M. Pallary, 1918)
Xeroleuca brulardi depressa (P.M. Pallary, 1913)
Xeroleuca brulardi pyramidata J. Ahuir Galindo, 2017
Xerosecta brunoti (P.M. Pallary, 1919)
Paedhoplita buamica L. Tsvetkov, 1943
Discula bulverii (W. Wood, 1828)
Discula bulweri (W. Wood, 1828)
Cryptosaccus cabrerensis G.A. Holyoak & D.T. Holyoak,2014
Trichia caelata (S.E. Studer, 1820)
Angiomphalia caelestimontana (Y. Tzvetkov, 1940)
Discula calcigena (R.T. Lowe, 1831)
Discula calcigena discina R.T. Lowe, 1852
Discula calcigena gomesiana C.de Paiva, 1866
Caseolus calculus (R.T. Lowe, 1854)
Leptaxis caldeirarum P.M.A. Morelet & H. Drouët,1857
Caucasocressa callosa B. Hausdorf & G. Falkner,2001
Caseolus calvus (R.T. Lowe, 1831)
Caseolus calvus galeatus (R.T. Lowe, 1862)
Candidula camporoblensis S .de Fez, 1944
Xeropicta candaharica (L. Pfeiffer, 1846)
Candidula candidescens A.J. Wagner, 1928
Xeromunda candiota (L. Pfeiffer, 1849)
Pyrenaearia cantabrica (J.G. Hidalgo, 1863)
Pyrenaearia cantabrica covadongae A. Ortiz De Zárate, 1956
Eutheba cantiana (G. Montagu, 1803)
Helicella caperata (G. Montagu, 1803)
Pyrenaearia carascalensis (A. Michaud, 1831)
Pyrenaearia carascalensis esserana (J.R. Bourguignat, 1887)
Pyrenaearia carascalensis transfuga (P. Fagot, 1885)
Monacha carascaloides J.R. Bourguignat, 1855
Amandana cardonae (J.G. Hidalgo, 1867)
Leucozonella caria A.A. Schileyko, 1978
Monacha carinata B. Hausdorf, 2000
Hygromia carinatissima (FOSSIL) (Sacco, 1886) †