Originally published with improper, correctable termiantion as "Medullosae".
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Full reference: H. R. Göppert. 1864. Die fossile Flora der Permischen Formation. Palaeontographica 12:1-316
Parent taxon: Spermatophytata according to P. Kenrick and P.R. Crane 1997
See also Jennings 1980
Sister taxa: Cardioneura, Euspermatoclides, Hydraspermaceae
Subtaxa: Colpoxylon Mariopteris Myelopithys Myelopteris Neuropteris Porosus Pseudomariopteris Stenzelia Sutcliffia Weissites Whittleseyinae
Distribution:
• Jurassic of China (1 collection)
• Triassic of Germany (4), Italy (1)
• Wolfcamp of Mexico (1)
• Rotliegendes of United States (1: New Mexico)
• Permian of Canada (1: Nunavut), China (50), the Czech Republic (1), France (4), Germany (17), Indonesia (1), Italy (1), Mexico (1), Morocco (3), North Korea (2), Portugal (1), the Russian Federation (3), South Korea (1), Spain (3), Turkey (1), United States (11: Arizona, Kansas, Michigan, Oklahoma, Texas), Venezuela (1)
• Virgilian of United States (1: New Mexico)
• Desmoinesian of United States (2: Indiana)
• Westphalian of Canada (1: Nova Scotia), Spain (1), United States (1: Illinois)
• Atokan of United States (2: Indiana)
• Pennsylvanian of Belize (2), Portugal (2), Spain (1), United States (22: Colorado, Georgia, Illinois, Kansas, Kentucky, Michigan, New Mexico)
• Namurian of Spain (1)
• Carboniferous to Permian of Spain (2)
• Carboniferous of Canada (10: New Brunswick, Nova Scotia, Prince Edward Island), Germany (4), Portugal (1), Spain (8), Turkey (4), Ukraine (1), the United Kingdom (4), United States (48: Arizona, Colorado, Georgia, Illinois, Indiana, Kansas, Kentucky, Missouri, Nebraska, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, West Virginia)
• Mississippian of Canada (1: New Brunswick), United States (9: Illinois, Missouri, Pennsylvania, Utah, West Virginia)
Total: 238 collections including 501 occurrences