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 | Coscinodiscales | |
| Family | Hemidiscaceae | |
| Genus | Actinocyclus |
List of Individual Species - see Taxon profile using the name of the taxa.
| Actinocyclus actinochilus | (Ehrenb.) Simonsen, 1982 | ||
| Actinocyclus adeliae | Manguin, 1957 | ||
| Actinocyclus cholnokyi | Van Landingham 1967 | ||
| Actinocyclus curvatulus | Janisch, 1878 | ||
| Actinocyclus dimorphus | |||
| Actinocyclus divisus | (Grunow) Hust., 1958 | ||
| Actinocyclus ehrenbergii | Ralfs in Pritchard 1861 | ||
| Actinocyclus ehrenbergii var. asteriscus | |||
| Actinocyclus exiguus | Fyxell & Semina, 1981 | ||
| Actinocyclus hookeri | |||
| Actinocyclus ingens | |||
| Actinocyclus karsteni | Van Heurck 1909 | ||
| Actinocyclus normanni | (Gregory) Hustedt 1957 | ||
| Actinocyclus octonarius | (Ehrenb.) Ehrenb., 1838 | ||
| Actinocyclus sp. | |||
| Actinocyclus spiritus | Watkins, 1986 | ||
| Actinocyclus undulatus | J.W. Bailey, 1842 |