| Label | Id | |
|---|---|---|
| Cephoidea | 222823 | |
| Ceratiosicyos | 212225 | |
| Cerebratulidae | 6222 | |
| Chamaemyces | 222930 | |
| Charhyphus | 1542221 | |
| Chinius | 1222036 | |
| Chirostylidae | 177222 | |
| Chlidanthus | 82221 | |
| Chlorogomphus | 126222 | |
| Chroothece | 362227 | |
| Chrysopodocystis | 1522270 | |
| Chylismiella | 1402223 | |
| Cimbex | 222783 | |
| Citharexylum | 222864 | |
| Clausilocolidae | 1002221 |