| Closed mitosis + | 17:10:31, 2 December 2016 + |
| Clowes and Wilson, 2006 + | 22:55:01, 6 December 2016 + |
| Clowes et al., 2016 + | 22:55:02, 6 December 2016 + |
| Clowes, 1985 + | 00:06:42, 22 December 2016 + |
| Clowes, 2013 + | 22:55:01, 6 December 2016 + |
| Cnidocyst + | 17:10:31, 2 December 2016 + |
| Cobricosphaeridium Appendix A + | 00:00:44, 22 December 2016 + |
| Cobricosphaeridium awendae Appendix A + | 00:00:45, 22 December 2016 + |
| Cobricosphaeridium giganteum Appendix A + | 00:00:45, 22 December 2016 + |
| Cobricosphaeridium hebes Appendix A + | 00:00:45, 22 December 2016 + |
| Cobricosphaeridium hinojalense Appendix A + | 00:00:46, 22 December 2016 + |
| Cobricosphaeridium myalupense Appendix A + | 00:00:46, 22 December 2016 + |
| Cobricosphaeridium ovatum Appendix A + | 00:00:46, 22 December 2016 + |
| Cobricosphaeridium pikeae Appendix A + | 00:00:47, 22 December 2016 + |
| Cobricosphaeridium serpens Appendix A + | 00:00:47, 22 December 2016 + |
| Cobricosphaeridium spiniferum Appendix A + | 00:00:48, 22 December 2016 + |
| Cobricosphaeridium spiniferum subsp. elegans Appendix A + | 00:00:48, 22 December 2016 + |
| Cobricosphaeridium spiniferum subsp. spiniferum Appendix A + | 00:00:48, 22 December 2016 + |
| Cobricosphaeridium vermiculatum Appendix A + | 00:00:49, 22 December 2016 + |
| Cobricosphaeridium yanchepense Appendix A + | 00:00:49, 22 December 2016 + |
| Coccoid + | 17:10:31, 2 December 2016 + |
| Coccoid cell + | 17:10:31, 2 December 2016 + |
| Coccoid phase + | 17:10:32, 2 December 2016 + |
| Coccopterum + | 19:41:21, 4 December 2016 + |
| Coccopterum labyrinthus + | 23:11:11, 21 December 2016 + |