| [25151] Hyalinoecia tubicola | Appellations de Taxon | 25151 |
| [25152] Hymeniacidon | Appellations de Taxon | 25152 |
| [25153] Hypnea musciformis | Appellations de Taxon | 25153 |
| [25154] Hypoglossum hypoglossoides | Appellations de Taxon | 25154 |
| [25155] Inachidae | Appellations de Taxon | 25155 |
| [25156] Jania | Appellations de Taxon | 25156 |
| [25157] Janua (Dexiospira) pagenstecheri | Appellations de Taxon | 25157 |
| [25158] Kallymenia | Appellations de Taxon | 25158 |
| [25159] Kefersteinia cirrata | Appellations de Taxon | 25159 |
| [2516] Chaetarthriini | Appellations de Taxon | 2516 |
| [25160] Kellia suborbicularis | Appellations de Taxon | 25160 |
| [25161] Labioleanira | Appellations de Taxon | 25161 |
| [25163] Langerhansia anops | Appellations de Taxon | 25163 |
| [25164] Laonice cirrata | Appellations de Taxon | 25164 |
| [25165] Laurencia microcladia | Appellations de Taxon | 25165 |
| [25166] Laurencia obtusa | Appellations de Taxon | 25166 |
| [25167] Lepidepecreum longicornis | Appellations de Taxon | 25167 |
| [25168] Lepidopleurida | Appellations de Taxon | 25168 |
| [25169] Leptochelia savignyi | Appellations de Taxon | 25169 |
| [2517] Hydrophilinae | Appellations de Taxon | 2517 |
| [25170] Leptopentacta elongata | Appellations de Taxon | 25170 |
| [25171] Linopherus | Appellations de Taxon | 25171 |
| [25172] Lioconcha philippinarum | Appellations de Taxon | 25172 |
| [25173] Lithodesmiaceae | Appellations de Taxon | 25173 |
| [25174] Lithophyllum incrustans | Appellations de Taxon | 25174 |
| [25175] Lithothamnion lenormandii | Appellations de Taxon | 25175 |
| [25176] Litocorsa stremma | Appellations de Taxon | 25176 |
| [25177] Lomentaria articulata | Appellations de Taxon | 25177 |
| [25178] Lomentaria clavellosa | Appellations de Taxon | 25178 |
| [25179] Lomentaria orcadensis | Appellations de Taxon | 25179 |
| [2518] Berosini | Appellations de Taxon | 2518 |
| [25180] Loveniidae | Appellations de Taxon | 25180 |
| [25181] Lumbrineriopsis paradoxa | Appellations de Taxon | 25181 |
| [25182] Maja brachydactyla | Appellations de Taxon | 25182 |
| [25183] Malmgrenia | Appellations de Taxon | 25183 |
| [25184] Mastocarpus stellatus | Appellations de Taxon | 25184 |
| [25185] Membranipora | Appellations de Taxon | 25185 |
| [25186] Membranoptera alata | Appellations de Taxon | 25186 |
| [25187] Meredithia | Appellations de Taxon | 25187 |
| [25188] Mesodinium | Appellations de Taxon | 25188 |
| [25189] Mesophyllum | Appellations de Taxon | 25189 |
| [2519] Hydrobius fuscipes | Appellations de Taxon | 2519 |
| [25190] Myra | Appellations de Taxon | 25190 |
| [25191] Neopentadactyla | Appellations de Taxon | 25191 |
| [25192] Nitophyllum punctatum | Appellations de Taxon | 25192 |
| [25193] Nothria conchylega | Appellations de Taxon | 25193 |
| [25194] Notomastus (Clistomastus) hemipodus | Appellations de Taxon | 25194 |
| [25195] Nymphon | Appellations de Taxon | 25195 |
| [25196] Odostomia plicata | Appellations de Taxon | 25196 |
| [25197] Oerstedia | Appellations de Taxon | 25197 |