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 | Diatomophyceae/Bacillariophyceae | |
| Order | Pennales | |
| Family | Fragilariaceae | |
| Genus | Thalassiothrix |
List of Individual Species - see Taxon profile using the name of the taxa.
| Thalassiothrix antarctica | Schimp. ex Karst., 1905 | ||
| Thalassiothrix delicatula | |||
| Thalassiothrix longissima | Cleve et Grunow in Cleve et M÷ller 1878 | ||
| Thalassiothrix sp. |