| Calyptra eustrigata Hampson 1926 | | Shapiro, Leo | |
| Calyptra thalictri Borkhausen 1790 | | Shapiro, Leo | en |
| Calyptranthes pallens Griseb. | | Shapiro, Leo | en |
| Camellia sinensis (L.) O. Kuntze | | Shapiro, Leo | en |
| Cameraria ohridella Deschka & Dimic 1986 | | Lees, D.C.; Lop... | en |
| Canis lupus Linnaeus, 1758 | | Frаnkis, Michаel | en |
| Canis simensis Rüppell, 1840 | | Shapiro, Leo | en |
| Cantharellus cibarius Fr. 1821 | | Shapiro, Leo | en |
| Capillaria aerophila | | Shapiro, Leo | en |
| Capillaria hepatica | | Shapiro, Leo | en |
| Capillaria philippinensis | | Shapiro, Leo | en |
| Capparis mitchellii | | Shapiro, Leo | en |
| Capsicum | | Shapiro, Leo | en |
| caracara | | Campbell, Dana | en |
| Caracara lutosa (Ridgway, 1876) | | Campbell, Dana | en |
| Carcharadon carcharias | | Shapiro, Leo | en |
| Carcharhinus leucas (Müller and Henle, 1839) | | Soulanille, Elaine | |
| Carcharhinus signatus (Poey, 1868) | | Shapiro, Leo | en |
| Caretta caretta Linnaeus 1758 | | Soulanille, Elaine; Shapiro, Leo | en |
| Carex morrowii | | Schulz, Katja | en |
| Carios | | Shapiro, Leo | en |
| Carios kelleyi Cooley & Kohls, 1941 | | Shapiro, Leo | en |
| Carybdea sivickisi Stiasny, 1926 | | Shapiro, Leo | en |
| Cassiopea | | Shapiro, Leo | en |
| Cassiopea xamachana Bigelow, 1892 | | Shapiro, Leo | en |
| Cassis tuberosa (Linnaeus, 1758) | | Shapiro, Leo | en |
| Cattleya | | Shapiro, Leo | en |
| Caudata | | Schulz, Katja | |
| Caulerpa mexicana Sonder ex Kützing | | Soulanille, Elaine | |
| Caulerpa racemosa (Forsskål) J. Agardh | | Soulanille, Elaine | |
| Caulerpa taxifolia (M. Vahl) C. Agardh | | Soulanille, Elaine | en |
| Caulolatius intermedius Howell Rivero, 1936 | | Hammock, Jen | en |
| Cavia intermedia Cherem, Olimpio & Ximenez, 1999 | | Campbell, Dana | en |
| Cavia porcellus (Linnaeus, 1758) | | Shapiro, Leo | en |
| Cedrus libani A. Rich. | | Shapiro, Leo | en |
| Centurio senex Gray, 1842 | | Shapiro, Leo | en |
| Cephalochordata | | Schulz, Katja; Shapiro, Leo | en |
| Cephalopoda | | Soulanille, Elaine; Shapiro, Leo | en |
| Cephalorhyncha | | Shapiro, Leo | en |
| Cephea cephea (Forskal, 1775) | | Campbell, Dana | en |
| Cerambycidae | | Schulz, Katja | |
| Cerataulus smithii Ralfs ex Pritchard | | Chong, Steven; Shapiro, Leo | en |
| Ceratocystis fagacearum (Bretz) J. Hunt 1956 | | Barbaro, Tracy | en |
| Cerceris fumipennis | | Shapiro, Leo | en |
| Cercopagis pengoi (Ostroumov, 1891) | | Barbaro, Tracy | en |
| Cetomimidae | | Schulz, Katja | |
| Chaetognatha | | Schulz, Katja; Shapiro, Leo | en |
| Chamaesyce garberi | | Schulz, Katja | en |
| Champia parvula (C. Agardh) Harvey | | Shapiro, Leo | en |
| Champsocephalus gunnari Lönnberg, 1905 | | Shapiro, Leo | en |
