Order Welwitschiales (cycads)
Parent taxon: Cycadopsida according to S. V. Meyen 1984
Sister taxa: Boweniaceae, Crassofilicites, Cycadales, Deltolepis, Dioales, Drepanozamites, Gnetales, Lagenostomales, Manebachia, Marantoidea, Orthogoniopteris, Pteridospermales, Stangeriaceae, Strangerites, Trigonocarpales
Subtaxa: Welwitschiaceae
Distribution: