†phylum Progymnospermophyta Lang 1925
Parent taxon: Embryophyta according to E. Taylor et al. 2008
See also Scheckler 1986
Sister taxa: Antherocerotophyta, Anthocerotophyta, Coniferophyta, Cycadophyta, Gigantopteridales, Ginkgophyta, Hermanophytales, Iraniales, Lycophyta, Pteridospermophyta, Sphenophyta, Zosterophyllophyta
Subtaxa: Actinoxylon Arctophyton Proteokalon Rellimia
Distribution:
• Devonian of Belgium (2 collections), the Czech Republic (11), Germany (3), United States (9: New York)
Total: 25 collections including 34 occurrences