Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta |
| Corticata | |
| kingdom | Chromalveolata Adl et al., 2005 |
| phylum | Haptophyta Cavalier-Smith, 1986 |
| class | Prymnesiophyceae Hibberd, 1976 - haptophyte algae |
| subclass | Prymnesiophycidae Cavalier-Smith, 1986 |
| order | Zygodiscales Young & Bown, 1997 |
| family | Calyptrosphaeraceae Boudreaux & Hay, 1969 |
| genus | Ramsaya Risatti, 1973 † |
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