Polypodiopsida - Salviniales - Polypodiidae
Parent taxon: Salviniales according to A. Ali et al. 2025
See also Christophel 1976, De Benedetti et al. 2018, De Benedetti et al. 2021, De Benedetti et al. 2024, Hermsen et al. 2019, Hickey 1977, I 2016, Jud 2011, Knowlton 1919, Mabberley 2000, Vallati et al. 2016, Vallati et al. 2017 and Vallati et al. 2020
Sister taxa: Azollaceae, Paleoazolla, Parazollopsis, Thecaspora
Subtaxa: Ariadnaesporites Azolla Azollophyllum Massulites Salvinia Sausarospermum
Distribution:
• Quaternary of China (3 collections), Japan (4), the United Kingdom (3)
• Pliocene to Pleistocene of Italy (2)
• Pliocene of Germany (5), Japan (1), the Russian Federation (1)
• Miocene to Pliocene of Germany (1)
• Miocene of Argentina (4), China (2), Czechia (1), Germany (33), Japan (1), Poland (1), the Russian Federation (17), Switzerland (1)
• Oligocene to Miocene of Argentina (6), Australia (2)
• Oligocene of Canada (1: British Columbia), Germany (9), the Russian Federation (16), the United Kingdom (1)
• Eocene to Oligocene of the United Kingdom (1)
• Eocene of Argentina (2), Australia (2), Canada (4: British Columbia), China (3), India (1), the United Kingdom (1), United States (35: North Dakota, Washington, Wyoming)
• Paleocene to Eocene of Belgium (2), India (1), the Netherlands (3)
• Tertiary of the Netherlands (1), the Russian Federation (1)
• Paleocene of Antarctica (1), Argentina (6), Belgium (1), Canada (8: Alberta, Saskatchewan), Colombia (1), India (1), the Netherlands (10), United States (29: Montana, North Dakota, South Dakota, Wyoming)
• Paleogene of India (1)
• Cretaceous to Paleogene of Antarctica (3), Argentina (3), Canada (3: Alberta)
• Cretaceous of Antarctica (1), Argentina (15), Canada (63: Alberta, Nunavut), China (1), Egypt (1), India (1), Mexico (1), the Netherlands (2), South Sudan (1), United States (33: Alabama, Kansas, Maryland, Minnesota, Montana, New Mexico, North Dakota)
Total: 358 collections including 557 occurrences