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 | Bacillariophyta | |
| Class | Bacillariophyceae | |
| Order | Acnanthales | |
| Family | Achnanthidiaceae | |
| Genus | Achnanthidium |
List of Individual Species - see Taxon profile using the name of the taxa.
| Achnanthidium lanceolatum | BrÚbisson ex Kitzing 1849 | Synonym | |
| Achnanthidium lanceolatum f. tipica | Mayer 1916 | Synonym | |
| Achnanthidium microcephalum | Kitzing 1844 | Synonym |