At any stage, you can move up or down the Taxonomic hierachy of Antarctic/subantarctic species by clicking on any name. Lower level taxon counts are shown in [].
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| Kingdom | Chromista | |
| Phylum | Ochrophyta | |
| Class | Coscinodiscophyceae | |
| Order | Thalassiosirales | |
| Family | Thallassiosiraceae | |
| Genus | Thalassiosira |
List of Individual Species - see Taxon profile using the name of the taxa.
| Thalassiosira antarctica | Comber | ||
| Thalassiosira complicata | R. Gersonde | ||
| Thalassiosira elliptipora | (Donahue) Fenner | ||
| Thalassiosira gracilis var. gracilis | (Karst.) Hust. | ||
| Thalassiosira gracilis var. expecta | (V. Land.) Fryxell et Hasle | ||
| Thalassiosira insigna | (A. P. Jousé) D. M. Harwood & T. Maruyama | ||
| Thalassiosira inura | R. Gersonde | ||
| Thalassiosira spp. | |||
| Thalassiosira striata | D. M. Harwood & T. Maruyama | ||
| Thalassiosira vulnifica | |||
| Thalassiosira webbi | D. M. Harwood & T. Maruyama |