| [21863] Cucullaearca | Appellations de Taxon | 21863 |
| [21864] Cucullaearca candida | Appellations de Taxon | 21864 |
| [21865] Cyanocyclas | Appellations de Taxon | 21865 |
| [21866] Cyanocyclas rotunda | Appellations de Taxon | 21866 |
| [21867] Cyclestheria | Appellations de Taxon | 21867 |
| [21868] Cyclestheria hislopi | Appellations de Taxon | 21868 |
| [21869] Cyclestheridae | Appellations de Taxon | 21869 |
| [2187] Osmerus | Appellations de Taxon | 2187 |
| [21870] Cyclopecten | Appellations de Taxon | 21870 |
| [21871] Cyclopecten nanus | Appellations de Taxon | 21871 |
| [21872] Cylichna | Appellations de Taxon | 21872 |
| [21873] Cylichna verrillii | Appellations de Taxon | 21873 |
| [21874] Cylichnidae | Appellations de Taxon | 21874 |
| [21875] Cymatium | Appellations de Taxon | 21875 |
| [21878] Cymatium femorale | Appellations de Taxon | 21878 |
| [21879] Cymatium krebsii | Appellations de Taxon | 21879 |
| [2188] Osmerus eperlanus | Appellations de Taxon | 2188 |
| [21881] Cymatium pileare | Appellations de Taxon | 21881 |
| [21882] Cymatium raderi | Appellations de Taxon | 21882 |
| [21884] Cypraecassis | Appellations de Taxon | 21884 |
| [21885] Cypraecassis testiculus | Appellations de Taxon | 21885 |
| [21886] Cypraeidae | Appellations de Taxon | 21886 |
| [21887] Cypraeoidea | Appellations de Taxon | 21887 |
| [21888] Cyrtopleura | Appellations de Taxon | 21888 |
| [21889] Cyrtopleura costata | Appellations de Taxon | 21889 |
| [2189] Percidae | Appellations de Taxon | 2189 |
| [21890] Cyclestherida | Appellations de Taxon | 21890 |
| [21891] Cystiscidae | Appellations de Taxon | 21891 |
| [21892] Dalium | Appellations de Taxon | 21892 |
| [21893] Dalium solidum | Appellations de Taxon | 21893 |
| [21894] Dasythemis | Appellations de Taxon | 21894 |
| [21895] Dasythemis esmeralda | Appellations de Taxon | 21895 |
| [21896] Dasythemis essequiba | Appellations de Taxon | 21896 |
| [21897] Dentimargo | Appellations de Taxon | 21897 |
| [21898] Dentimargo reductus | Appellations de Taxon | 21898 |
| [21899] Dentimargo sulcatus | Appellations de Taxon | 21899 |
| [219] Hydropsyche saxonica | Appellations de Taxon | 219 |
| [2190] Gymnocephalus | Appellations de Taxon | 2190 |
| [21900] Depressiscala | Appellations de Taxon | 21900 |
| [21901] Depressiscala nitidella | Appellations de Taxon | 21901 |
| [21902] Desmogomphus | Appellations de Taxon | 21902 |
| [21903] Desmogomphus tigrivensis | Appellations de Taxon | 21903 |
| [21904] Diacavolinia | Appellations de Taxon | 21904 |
| [21905] Diacavolinia deshayesi | Appellations de Taxon | 21905 |
| [21906] Diacavolinia longirostris | Appellations de Taxon | 21906 |
| [21907] Diastatops | Appellations de Taxon | 21907 |
| [21908] Diastatops dimidiata | Appellations de Taxon | 21908 |
| [21909] Diastatops obscura | Appellations de Taxon | 21909 |
| [2191] Gymnocephalus cernuus | Appellations de Taxon | 2191 |
| [21910] Diastatops pullata | Appellations de Taxon | 21910 |