| [19010] Thalassiosira fasciculata | Appellations de Taxon | 19010 |
| [19011] Thalassiothrix frauenfeldii | Appellations de Taxon | 19011 |
| [19012] Thalassiosira gracilis | Appellations de Taxon | 19012 |
| [19013] Thalassiothrix lanceolata | Appellations de Taxon | 19013 |
| [19014] Tryblionella hyalina | Appellations de Taxon | 19014 |
| [19015] Thalassiothrix longissima | Appellations de Taxon | 19015 |
| [19016] Tryblionella hungarica var. pantocsekii | Appellations de Taxon | 19016 |
| [19017] Thalassiophysa hyalina | Appellations de Taxon | 19017 |
| [19018] Thalassiosira ignota | Appellations de Taxon | 19018 |
| [1902] Ranunculus flammula | Appellations de Taxon | 1902 |
| [19020] Thalassiosira inlandica | Appellations de Taxon | 19020 |
| [19021] Thalassiosira intrannula | Appellations de Taxon | 19021 |
| [19022] Thalassiosira lineoides | Appellations de Taxon | 19022 |
| [19023] Thalassiosira minima | Appellations de Taxon | 19023 |
| [19024] Thalassiosira mioplicata | Appellations de Taxon | 19024 |
| [19025] Trochosira mirabilis | Appellations de Taxon | 19025 |
| [19026] Thalassiosira minuscula | Appellations de Taxon | 19026 |
| [19027] Tryblionella marginulata var. subconstricta f. minuta | Appellations de Taxon | 19027 |
| [19028] Tryblionella marginulata var. subconstricta | Appellations de Taxon | 19028 |
| [19029] Thalassiosira hyalina | Appellations de Taxon | 19029 |
| [1903] Ranunculus fluitans | Appellations de Taxon | 1903 |
| [19030] Thalassionema hirosakiensis | Appellations de Taxon | 19030 |
| [19031] Thalassiosira leptopus | Appellations de Taxon | 19031 |
| [19032] Tryblionella hungarica var. linearis | Appellations de Taxon | 19032 |
| [19033] Thalassiosira poroseriata | Appellations de Taxon | 19033 |
| [19034] Thalassiosira spinulata | Appellations de Taxon | 19034 |
| [19035] Thalassionema synedriforme | Appellations de Taxon | 19035 |
| [19036] Thalassiosira tealata | Appellations de Taxon | 19036 |
| [19037] Tryblionella hungarica abnormal form | Appellations de Taxon | 19037 |
| [19038] Tabularia investiens | Appellations de Taxon | 19038 |
| [19039] Triceratium irregulare | Appellations de Taxon | 19039 |
| [1904] Ranunculus hederaceus | Appellations de Taxon | 1904 |
| [19040] Tetracyclus japonicus | Appellations de Taxon | 19040 |
| [19041] Trossulus javanicus | Appellations de Taxon | 19041 |
| [19042] Thalassiosira kanayae | Appellations de Taxon | 19042 |
| [19043] Takanoa bingensis | Appellations de Taxon | 19043 |
| [19044] Tabularia ktenoeides | Appellations de Taxon | 19044 |
| [19045] Thalassiosira kushirensis | Appellations de Taxon | 19045 |
| [19046] Tryblionella littoralis var. tergestina | Appellations de Taxon | 19046 |
| [19047] Thalassiocyclus lucens | Appellations de Taxon | 19047 |
| [19048] Thalassiosira lundiana | Appellations de Taxon | 19048 |
| [19049] Triceratium majus | Appellations de Taxon | 19049 |
| [1905] Ranunculus ololeucos | Appellations de Taxon | 1905 |
| [19050] Tryblionella marginulata | Appellations de Taxon | 19050 |
| [19051] Tropidoneis maxima | Appellations de Taxon | 19051 |
| [19052] Tetracyclus maximumcostata | Appellations de Taxon | 19052 |
| [19053] Trossulus nicobaricus | Appellations de Taxon | 19053 |
| [19054] Tursiocola olympica | Appellations de Taxon | 19054 |
| [19055] Tursiocola omurai | Appellations de Taxon | 19055 |
| [19056] Tetracyclus ovalifolius | Appellations de Taxon | 19056 |