Synonym: Trimerophytophyta Bold 1973
Full reference: W. Zimmermann. 1930. Die Phylogenie der Pflanzen
Parent taxon: Embryophyta according to E. Taylor et al. 2008
See also Doweld 2001
Sister taxa: Acylomurus, Antherocerotophyta, Anthocerotophyta, Concavissimisporites, Coniferophyta, Cycadophyta, Divisisporites, Gigantopteridales, Ginkgophyta, Hermanophytales, Iraniales, Lusatisporis, Lycophyta, Progymnospermophyta, Pteridospermophyta, Sphenophyta, Zosterophyllophyta
Subtaxa: Acanthophyton Arthrostigma Barrandeina Drepanophycus Eogaspesiea Hedeia Hicklingia Himantophyton Hornea Horneophyton Hostinella Niayssia Polyxylon Psilodendrion Psilophytites Psilophytopsida Psilotiphyllum Reimanniopsis Serrulacaulis Stolbergia Svalbardia Taeniocrada Tomiphyton