Ginkgoopsida - Callistophytales
Parent taxon: Ginkgoopsida according to S. V. Meyen 1984
See also Taylor et al. 2008
Sister taxa: Asterophyllum, Calamopityales, Caytoniales, Czekanowskiales, Dactylophyllum, Ephedrales, Ginkgoales, Karkeniales, Leptostrobales, Linguifolium, Pentoxylales, Umaltolepididae
Subtaxa: Callistophytaceae Cornucarpaceae
Distribution:
• Permian of Argentina (1 collection), Canada (1: Nunavut), the Czech Republic (2), France (2), Germany (8), Italy (1), Portugal (1), the Russian Federation (6), United States (1: Texas)
• Carboniferous to Permian of the Russian Federation (1)
• Carboniferous of Canada (1: Nova Scotia), Germany (2), Kazakhstan (1), Portugal (2), the Russian Federation (2), Spain (7), United States (30: Alabama, Georgia, Illinois, Indiana, Kansas, Kentucky, Michigan, Missouri, Oklahoma)
Total: 69 collections including 74 occurrences