†unranked clade Sawdoniales
Zosterophyllopsida - Sawdoniales
Parent taxon: Zosterophyllopsida according to P. Kenrick and P.R. Crane 1997
Sister taxa: Barinophyton, Cooksoniales, Zosterophyllales
Subtaxa: Barinophytaceae Gosslingiaceae Hsuaceae Sawdoniaceae