Gymnospermopsida - Corystospermales - Corystospermaceae
Synonym: Umkomastiaceae [replaced name]
Full reference: H. H. Thomas. 1933. On some pteridospermous plants from the Mesozoic rocks of South Africa. Philosophical Transactions of the Royal Society of London 222B:193-265
Parent taxon: Corystospermales according to S. Chatterjee et al. 2013
See also Conran et al. 2009, Holmes 1982, Holmes 1987, Kenrick and Crane 1997, Meyen 1984 and Moisan et al. 2010
Sister taxon: Doylea
Subtaxa: Cuneumxylon Cycadopteris Dicroidiopsis Dicroidium Elchaxylon Fanerotheca Feruglioa Komlopteris Pteruchus Trichomanides Umkomasia Xylopteris
Distribution:
• Eocene of Australia (1 collection)
• Cretaceous of India (2)
• Jurassic to Cretaceous of Egypt (1), India (1)
• Jurassic of Antarctica (2), Argentina (1), France (12), Germany (5), India (3), Italy (1), Poland (1), Romania (1), the Russian Federation (1), the United Kingdom (4)
• Triassic to Jurassic of France (1)
• Triassic of Antarctica (6), Argentina (14), Australia (8), Brazil (2), Chile (13), China (1), Germany (1), India (9), Lesotho (7), New Zealand (1), South Africa (46)
• Permian to Triassic of India (1)
• Permian of India (3), Jordan (1), Madagascar (1), Turkey (1)
Total: 152 collections including 349 occurrences