†subfamily Whittleseyinae
Parent taxon: Medullosaceae according to H. N. Andrews 1970
Sister taxa: Colpoxylon, Mariopteris, Myelopithys, Myelopteris, Neuropteris, Porosus, Pseudomariopteris, Stenzelia, Sutcliffia, Weissites
Subtaxa: Dolerotheca
Distribution:
• Permian of Canada (1: Nunavut collection)
• Carboniferous of United States (1: West Virginia)
Total: 2 collections each including a single occurrence