Cycadopsida - Pteridospermales
Parent taxon: Cycadopsida according to W. B. K. Holmes 1982
See also Jain and Delevoryas 1967
Sister taxa: Boweniaceae, Crassofilicites, Cycadales, Deltolepis, Dioales, Drepanozamites, Gnetales, Lagenostomales, Manebachia, Marantoidea, Orthogoniopteris, Stangeriaceae, Strangerites, Trigonocarpales, Welwitschiales
Subtaxa: Bosea Chiropteris Concaryon Marhwaseaphyllum Rewaphyllum Rugapites Rugaspermum Rugatheca Thinnfeldia Thuringia
Distribution:
• Cretaceous of India (2 collections)
• Jurassic to Cretaceous of India (1), Peru (1)
• Jurassic of Antarctica (1), Australia (1), China (7), Georgia (2), India (13), Kazakhstan (1), New Zealand (3), Norway (1), Romania (1), the Russian Federation (4), Turkmenistan (1), Ukraine (1)
• Triassic to Jurassic of France (1), Romania (1), the Russian Federation (1), Sweden (1), Ukraine (1)
• Triassic of Argentina (1), Australia (9), Brazil (2), Chile (1), China (30), Germany (6), India (6), Italy (1), Japan (1), Kazakhstan (1), Kyrgyzstan (1), Mongolia (2), New Zealand (1), the Russian Federation (7), South Africa (22), South Korea (4), Sweden (1), Ukraine (3)
• Permian of Argentina (1), Brazil (3), China (13), Egypt (1), India (3), Madagascar (2), North Korea (3), South Korea (2)
• Carboniferous of United States (1: Pennsylvania)
Total: 173 collections including 208 occurrences