†class Progymnospermopsida Lang 1925
Parent taxon: Tracheophyta according to H. N. Andrews 1970
Sister taxa: Bryobiotina, Catenalis, Euphyllophytina, Gymnospermopsida, Lycophytina, Lycopodiobiotina, Pteridobiotina, Rhyniaceae, Rhyniopsida
Subtaxa: Cairoa Praeramunculus Tetraxylopteris
Distribution:
• Givetian of United States (1: New York collection)
• Devonian of Canada (1: Quebec), South Africa (18), United States (35: New York, Pennsylvania)
Total: 55 collections including 59 occurrences