| Carpopeltis F. Schmitz, 1895 |
| Carpopeltis bushiae (Farlow) Kylin, 1956 |
| Carpopeltis sinicola (Setch. & N.L. Gardner) Kylin, 1956 |
| Carpopeltis stella-polaris E.Y. Dawson, 1959 |
| Codiophyllum J.E. Gray, 1872 |
| Codiophyllum mexicanum Núñez-Resendiz, Dreckmann & Sentíes, 2019 |
| Corynomorpha J. Agardh, 1872 |
| Corynomorpha clavata (Harv.) J. Agardh, 1872 |
| Cryptonemia J. Agardh, 1842 |
| Cryptonemia angustata (Setch. & N.L. Gardner) E.Y. Dawson, 1954 |
| Cryptonemia crenulata (J. Agardh) J. Agardh, 1851 |
| Cryptonemia decolorata W.R. Taylor, 1945 |
| Cryptonemia guaymasensis (E.Y. Dawson) E.Y. Dawson, 1954 |
| Cryptonemia limensis (Kütz.) J.A. Lewis, 1990 |
| Cryptonemia luxurians (C. Agardh) J. Agardh, 1851 |
| Cryptonemia obovata J. Agardh, 1876 |
| Cryptonemia opuntioides E.Y. Dawson, 1966 |
| Cryptonemia peltata E.Y. Dawson, M. Neushul & R.D. Wildman, 1960 |
| Cryptonemia seminervis (C. Agardh) J. Agardh, 1846 |
| Cryptonemia taylorii I.A. Abbott, 1967 |