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 | Thalassionema |
List of Individual Species - see Taxon profile using the name of the taxa.
| Thalassionema bacillaris | Kolbe in Heiden et Kolbe 1955 | ||
| Thalassionema nitzschioides | (Grunow) Mereschk., 1902 | ||
| Thalassionema nitzschioides var. lanceolata | (Grunow) Mereschk., 1902 | ||
| Thalassionema nitzschioides var. capitulata | (Grunow) Mereschk., 1902 | ||
| Thalassionema nitzschioides forma 1. (sensu Zielinski and Gersonde) | (Grunow) Mereschk., 1902 | ||
| Thalassionema sp. |