†phylum Progymnospermophyta Lang 1925
Parent taxon: Embryophyta according to E. Taylor et al. 2008
See also Scheckler 1986
Sister taxa: Acylomurus, Antherocerotophyta, Anthocerotophyta, Concavissimisporites, Coniferophyta, Cycadophyta, Divisisporites, Gigantopteridales, Ginkgophyta, Hermanophytales, Iraniales, Lusatisporis, Lycophyta, Pteridospermophyta, Sphenophyta, Zosterophyllophyta
Subtaxa: Actinoxylon Arctophyton Proteokalon Rellimia
Distribution:
• Givetian of United States (1: New York collection)
• Devonian of Belgium (2), the Czech Republic (11), Germany (3), United States (8: New York)
Total: 25 collections including 34 occurrences