Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| Animalia incertae sedis | |
| phylum | Problematica † |
| class | Eldoniata MacGabhann, 2012 † |
| order | Eldonida MacGabhann, 2012 † |
| family | Eldoniidae Walcott, 1911 † |
| genus | Eldonia Walcott, 1911 † |
| species | Eldonia eumorpha (Sun & Hou, 1987) † |