Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| kingdom | Chromalveolata Adl et al., 2005 |
| phylum | Heterokontophyta |
| subphylum | Diatomeae (Dumortier, 1821) Cavalier-Smith, 1995 - diatoms |
| class | Fragilariophyceae Round, 1990 |
| subclass | Fragilariophycidae Round 1990 |
| order | Fragilariales Silva 1962 |
| family | Fragilariaceae Greville 1833 |
| genus | Meridion C.A. Agardh 1824 |
| species | Meridion circulare (Grev.) C.Agardh 1831 |