Cycadopsida - Cycadales - Zamiaceae
Parent taxon: Cycadales according to Horaninow 1834
See also Christenhusz et al. 2011, Iglesias 2016, Mabberley 2000, Martínez et al. 2012 and Martínez et al. 2018
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, Nilsonia, Nilssoniaceae, Palaeozamia, Paracycas, Phasmatocycas, Pleiotrichium, Sarmatiella, Stangerites, Sueria, Taeniopteris
Subtaxa: Bororoa Bowenia Brunoa Ceratozamia Encephalartoideae Lepidozamia Macrozamia Neochamberlainia Pterostoma Restrepophyllum Worsdellia Zamia
Distribution:
• Miocene of Chile (1 collection), New Zealand (1), Venezuela (1)
• Oligocene to Miocene of Argentina (1), Australia (1)
• Oligocene of Australia (1), Germany (2), Hungary (1)
• Eocene to Miocene of Argentina (1)
• Eocene of Argentina (3), Australia (23)
• Paleocene of Argentina (2), United States (6: Colorado, Wyoming)
• Cretaceous to Paleogene of New Zealand (1)
• Cretaceous of Antarctica (1), Argentina (4)
Total: 50 collections including 60 occurrences