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 | Zosterophyllophyta H. Bold † |
| class | Zosterophyllopsida Foster et Gifford † |
| order | Sawdoniales Kenrick et Crane † |