| [16480] Nitzschia section | Appellations de Taxon | 16480 |
| [16481] Nitzschia sigma var. sigmatella | Appellations de Taxon | 16481 |
| [16482] Nitzschia sansomei | Appellations de Taxon | 16482 |
| [16483] Navicula sparsipunctata | Appellations de Taxon | 16483 |
| [16484] Navicula subtenuis | Appellations de Taxon | 16484 |
| [16485] Navicula stompsii | Appellations de Taxon | 16485 |
| [16486] Nitzschia stompsii | Appellations de Taxon | 16486 |
| [16487] Nitzschia soratensis | Appellations de Taxon | 16487 |
| [16488] Navicula structa | Appellations de Taxon | 16488 |
| [16489] Navicula stoermeri | Appellations de Taxon | 16489 |
| [1649] Potamogeton lucens | Appellations de Taxon | 1649 |
| [16490] Nitzschia solgensis | Appellations de Taxon | 16490 |
| [16491] Nitzschia sociabilis abnormal form | Appellations de Taxon | 16491 |
| [16492] Navicula sovereignae | Appellations de Taxon | 16492 |
| [16493] Navicula salinarum f. parallela | Appellations de Taxon | 16493 |
| [16494] Navicula superba | Appellations de Taxon | 16494 |
| [16495] Navicula supercontenta | Appellations de Taxon | 16495 |
| [16496] Navicula septata | Appellations de Taxon | 16496 |
| [16497] Navicula semiapproximata | Appellations de Taxon | 16497 |
| [16498] Navicula subradiosa | Appellations de Taxon | 16498 |
| [16499] Nitzschia semirobusta morphotype semirobusta | Appellations de Taxon | 16499 |
| [165] Perla bipunctata | Appellations de Taxon | 165 |
| [1650] Potamogeton natans | Appellations de Taxon | 1650 |
| [16500] Nitzschia sigma var. rigida | Appellations de Taxon | 16500 |
| [16501] Nitzschia sigma var. rigidula | Appellations de Taxon | 16501 |
| [16502] Navicula subrostellata | Appellations de Taxon | 16502 |
| [16503] Navicula subcrassirostris | Appellations de Taxon | 16503 |
| [16504] Navicula sparsistriata | Appellations de Taxon | 16504 |
| [16505] Navicula subsulcata | Appellations de Taxon | 16505 |
| [16506] Navicula starmachioides | Appellations de Taxon | 16506 |
| [16507] Navicula sanctaecrucis | Appellations de Taxon | 16507 |
| [16508] Navicula stercumuscarum | Appellations de Taxon | 16508 |
| [16509] Nitzschia subtilis f. tchadensis | Appellations de Taxon | 16509 |
| [16510] Navicula subtilyra | Appellations de Taxon | 16510 |
| [16511] Navicula satura | Appellations de Taxon | 16511 |
| [16512] Navicula sanctacrux | Appellations de Taxon | 16512 |
| [16513] Nitzschia suchlandtii | Appellations de Taxon | 16513 |
| [16514] Navicula suecorum | Appellations de Taxon | 16514 |
| [16515] Navicula subfasciata | Appellations de Taxon | 16515 |
| [16516] Navicula superhasta | Appellations de Taxon | 16516 |
| [16517] Navicula sverdrupii | Appellations de Taxon | 16517 |
| [16518] Navicula subveneta | Appellations de Taxon | 16518 |
| [16519] Nitzschia svedstrupii | Appellations de Taxon | 16519 |
| [1652] Potamogeton nodosus | Appellations de Taxon | 1652 |
| [16520] Navicula subvitabunda | Appellations de Taxon | 16520 |
| [16521] Navicula subvulpina | Appellations de Taxon | 16521 |
| [16522] Navicula schweickerdtii | Appellations de Taxon | 16522 |
| [16523] Neosynedra provincialis | Appellations de Taxon | 16523 |
| [16524] Nitzschia tenuiarcuata | Appellations de Taxon | 16524 |
| [16525] Navicula tauta | Appellations de Taxon | 16525 |