Subfamily Woodwardioideae Gasper et al. 2016 (fern)
Parent taxon: Blechnaceae according to PPG. I 2016
Sister taxa: Blechnoideae, Leptolepidites, Midlandia, Peromonolites, Stenochlaenoideae
Subtaxa: Woodwardia
Distribution:
• Quaternary of India (4 collections)
• Miocene to Pliocene of Japan (1)
• Miocene of China (1)
• Eocene of Canada (1: British Columbia), China (1), United States (16: North Dakota, Washington, Wyoming)
• Clarkforkian of United States (8: Wyoming)
• Paleocene of Canada (6: Alberta, Saskatchewan), United States (12: Colorado, Montana, North Dakota, Wyoming)
• Cretaceous of United States (10: Montana, New Mexico, Wyoming)
Total: 60 collections each including a single occurrence