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)
• Permian of Canada (1: Nunavut), China (50), the Czech Republic (2), France (4), Germany (17), Indonesia (1), Italy (1), Mexico (2), 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)
• Namurian of Spain (1)
• Carboniferous to Permian of Spain (2), United States (1: New Mexico)
• Carboniferous of Belize (2), Canada (12: New Brunswick, Nova Scotia, Prince Edward Island), Germany (4), Kazakhstan (1), Portugal (3), Spain (10), Turkey (4), Ukraine (1), the United Kingdom (4), United States (86: Arizona, Colorado, Georgia, Illinois, Indiana, Kansas, Kentucky, Michigan, Missouri, Nebraska, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah, Virginia, West Virginia)
Total: 241 collections including 505 occurrences