| [25198] Onchidoris | Appellations de Taxon | 25198 |
| [25199] Ophiodromus flexuosus | Appellations de Taxon | 25199 |
| [252] Trichostegia | Appellations de Taxon | 252 |
| [2520] Hydrobius niger | Appellations de Taxon | 2520 |
| [25200] Ophiothrix fragilis | Appellations de Taxon | 25200 |
| [25201] Osmundea hybrida | Appellations de Taxon | 25201 |
| [25202] Osmundea pinnatifida | Appellations de Taxon | 25202 |
| [25203] Osmundea truncata | Appellations de Taxon | 25203 |
| [25204] Palmaria | Appellations de Taxon | 25204 |
| [25205] Panopeidae | Appellations de Taxon | 25205 |
| [25206] Paralacydonia | Appellations de Taxon | 25206 |
| [25207] Pariambus typicus | Appellations de Taxon | 25207 |
| [25208] Peachia | Appellations de Taxon | 25208 |
| [25209] Petalonia fascia | Appellations de Taxon | 25209 |
| [2521] Anacaena bipustulata | Appellations de Taxon | 2521 |
| [25210] Peyssonnelia | Appellations de Taxon | 25210 |
| [25211] Phascolion (Phascolion) | Appellations de Taxon | 25211 |
| [25212] Pholoe | Appellations de Taxon | 25212 |
| [25213] Phyllophora crispa | Appellations de Taxon | 25213 |
| [25214] Phyllophora pseudoceranoïdes | Appellations de Taxon | 25214 |
| [25215] Phymatolithon | Appellations de Taxon | 25215 |
| [25216] Pilargis verrucosa | Appellations de Taxon | 25216 |
| [25217] Pillucina neglecta | Appellations de Taxon | 25217 |
| [25218] Pilumnidae | Appellations de Taxon | 25218 |
| [25219] Pisionidae | Appellations de Taxon | 25219 |
| [2522] Anacaena globulus | Appellations de Taxon | 2522 |
| [25220] Plocamium cartilagineum | Appellations de Taxon | 25220 |
| [25221] Plumaria plumosa | Appellations de Taxon | 25221 |
| [25222] Podoceridae | Appellations de Taxon | 25222 |
| [25223] Polyneura bonnemaisonii | Appellations de Taxon | 25223 |
| [25224] Poromyidae | Appellations de Taxon | 25224 |
| [25225] Posidoniaceae | Appellations de Taxon | 25225 |
| [25226] Potamilla | Appellations de Taxon | 25226 |
| [25227] Praxillura longissima | Appellations de Taxon | 25227 |
| [25228] Propilidium | Appellations de Taxon | 25228 |
| [25229] Protodorvillea biarticulata | Appellations de Taxon | 25229 |
| [2523] Anacaena limbata | Appellations de Taxon | 2523 |
| [25230] Protodorvillea kefersteini | Appellations de Taxon | 25230 |
| [25231] Psammolyce | Appellations de Taxon | 25231 |
| [25232] Pseudoparatanais | Appellations de Taxon | 25232 |
| [25233] Pusillina lineolata | Appellations de Taxon | 25233 |
| [25234] Radicilingua thysanorhizans | Appellations de Taxon | 25234 |
| [25235] Rhodothamniella floridula | Appellations de Taxon | 25235 |
| [25236] Rhodymenia holmesii | Appellations de Taxon | 25236 |
| [25237] Rhodymenia pseudopalmata | Appellations de Taxon | 25237 |
| [25238] Rytiphlaea tinctoria | Appellations de Taxon | 25238 |
| [25239] Saccharina latissima | Appellations de Taxon | 25239 |
| [2524] Laccobius albipes | Appellations de Taxon | 2524 |
| [25240] Saccorhiza polyschides | Appellations de Taxon | 25240 |
| [25241] Schistomeringos neglecta | Appellations de Taxon | 25241 |