| Corvus caurinus Baird, 1858 | | Frаnkis, Michаel | en |
| Corylopsis glabrescens | | Schulz, Katja | en |
| Coryphaenoides rupestris | | Shapiro, Leo; Soulanille, Elaine | en |
| Crassostrea virginica (Gmelin, 1791) | | Soulanille, Elaine | en |
| Crenarchaeota | | Soulanille, Elaine | |
| Crepidula plana | | Schulz, Katja | |
| Crocosphaera watsonii | | Schulz, Katja | |
| Croton argyranthemus | | Corrigan, Bob | en |
| Cryptomyces maximus (Fr.) Rehm 1888 | | Campbell, Dana | en |
| Cryptopsaras couesii Gill, 1883 | | Shapiro, Leo | en |
| Cryptosporidium | | Shapiro, Leo | |
| Cryptosporidium canis Fayer, Trout, Xiao, Morgan, Lal and Dubey, 2001 | | Shapiro, Leo | |
| Cryptosporidium felis Iseki 1979 | | Shapiro, Leo | |
| Cryptosporidium hominis Morgan-Ryan, Fall, Ward, Hijjawi, Sulaiman, Fayer, Thompson, Olson, Lal and Xiao, 2002 | | Shapiro, Leo | en |
| Cryptosporidium meleagridis Slavin 1955 | | Shapiro, Leo | |
| Cryptosporidium muris Tyzzer 1907 | | Shapiro, Leo | |
| Cryptosporidium parvum Tyzzer 1912 | | Shapiro, Leo | en |
| Ctenophora | | Soulanille, Elaine | en |
| Culex tarsalis Coquillett, 1896 | | Shapiro, Leo | en |
| Cumacea | | Campbell, Dana; Soulanille, Elaine; Schulz, Katja | en |
| Cupressus gigantea W.C.Cheng & L.K.Fu | | Frаnkis, Michаel | en |
| Cuterebra | | Shapiro, Leo | en |
| Cyanobacteria | | Soulanille, Elaine; Schulz, Katja | en |
| Cybister fimbriolatus (Say, 1825) | | Barbaro, Tracy | en |
| Cycliophora | | Shapiro, Leo; Soulanille, Elaine; Schulz, Katja | en |
| Cyclosalpa | | Shapiro, Leo | en |
| Cyclospora cayetanensis | | Shapiro, Leo | en |
| Cyclura collei | | Campbell, Dana | en |
| Cydia deshaisiana Lucas 1858 | | Shapiro, Leo | en |
| Cymbidium | | Shapiro, Leo | en |
| Cymbidium ensifolium (L.) Sw. | | Shapiro, Leo | en |
| Cymbidium goeringii (Rchb. f.) Rchb. f. | | Shapiro, Leo | en |
| Cynoscion nebulosus (Cuvier, 1830) | | Hammock, Jen | en |
| Cyperus papyrus L. | | Frаnkis, Michаel | en |
| Cyphoma gibbosum (Linnaeus, 1758) | | Shapiro, Leo | en |
| Cystoisospora belli | | Shapiro, Leo | en |
| Dacelo gaudichaud Quoy & Gaimard 1824 | | Shapiro, Leo | en |
| Dacelo tyro G. R. Gray, 1858 | | Shapiro, Leo | en |
| Danio rerio (Hamilton, 1822) | | Shapiro, Leo | en |
| Dasyurus hallucatus Gould, 1842 | | Shapiro, Leo | en |
| Datana | | Shapiro, Leo | en |
| Daubentonia madagascariensis (Gmelin, 1788) | | Shapiro, Leo | en |
| Daucus carota L. | | Shapiro, Leo | en |
| Daucus carota ssp. carota L. | | Shapiro, Leo | en |
| Daucus carota ssp. sativus (Hoffm.) Arcang. | | Shapiro, Leo | en |
| Delphinapterus leucas | | Shapiro, Leo | en |
| Delphinium nuttallianum Pritz. ex Walp. | | Soulanille, Elaine | |
| Dendrobates tinctorius (Cuvier, 1797) | | Shapiro, Leo | en |
| Dendrobium | | Shapiro, Leo | en |
| Dendronephthya | | Shapiro, Leo | en |
