Alternative spelling: Nilssonia
Parent taxon: Cycadales according to S. V. Meyen 1984
See also Andrews 1970, Chandra and Tewari 1991, Knowlton 1919, Lakhanpal et al. 1976 and Peppe et al. 2007
Sister taxa: Amuriella, Anthrophyopsis, Apoldia, Archaeocycas, Aricycas, Beaniaceae, Behuninia, Bucklandia, Bureja, Cavamonocolpites, Crossozamiaceae, Ctenozamites, Cycadaceae, Cycadenia, Cycadinorachis, Dirhopalostachyaceae, Eucommiidites, Fascisvarioxylon, Gymnovulites, Haitingeria, Heilungia, Mesosingeria, Michelilloa, Nikania, Nilssoniaceae, Palaeozamia, Paracycas, Phasmatocycas, Pleiotrichium, Sarmatiella, Stangerites, Sueria, Taeniopteris, Zamiaceae
Subtaxa: Nilsonia californica Nilsonia compta Nilsonia gibbsii Nilsonia lata Nilsonia nigracollensis Nilsonia nipponensis Nilsonia oregonensis Nilsonia orientalis Nilsonia parvula Nilsonia pasaytensis Nilsonia polymorpha Nilsonia pterophylloides Nilsonia sambucensis Nilsonia schaumbergensis Nilsonia stantoni Nilssonia brevis Nilssonia fissa Nilssonia princeps
Type: Nilssonia brevis
Distribution:
• Cretaceous of Argentina (1 collection), Canada (20: Alberta, British Columbia), China (1), Ecuador (2), India (2), Japan (2), Kazakhstan (1), Puerto Rico (1), the Russian Federation (11), South Africa (1), Svalbard and Jan Mayen (1), United States (14: Alaska, British Columbia, North Dakota, Oregon, Wyoming)
• Jurassic to Cretaceous of Antarctica (1), Canada (2: British Columbia, Yukon), the Russian Federation (4)
• Jurassic of Afghanistan (4), Australia (2), Azerbaijan (1), Belarus (4), Chile (1), China (82), Georgia (7), Hong Kong (1), India (22), Iran (4), Japan (8), Kazakhstan (8), Kyrgyzstan (1), Lithuania (1), Mexico (1), New Zealand (4), Norway (1), Poland (3), Portugal (1), Romania (32), the Russian Federation (112), South Korea (1), Sri Lanka (1), Tajikistan (20), Turkmenistan (1), Ukraine (5), the United Kingdom (45), United States (5: Alaska, Montana, Utah, Wyoming), Uzbekistan (9)
• Triassic to Jurassic of Sweden (1)
• Triassic of Antarctica (1), Argentina (3), Armenia (1), Australia (2), Austria (1), China (50), Germany (3), Iran (2), Italy (4), Japan (2), Mongolia (1), the Russian Federation (4), South Africa (3), Sweden (3), Tajikistan (5), Thailand (1), Ukraine (3), United States (1: Utah)
• Permian of China (6)
Total: 548 collections including 1016 occurrences
Specimen images are retrieved through the ePANDDA API.
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