Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Pteridospermatophyta Meyen † |
| class | Phasmatocycadopsida Doweld † |
| order | Gigantopteridales Li et Yang † |
| family | Gigantopteridaceae Koidzumi † |
| genus | Evolsonia S.H. Mamay † |