Parent taxon: Cycadophytanae according to A. B. Doweld 2001
See also Hueber 1983
Sister taxa: Aneurophytophyta, Cycadeoideophyta, Gnetophyta, Moresnetiophyta, Noeggerathiophyta, Peltaspermophyta
Subtaxa: Andreisporis Anthophyta Araripia Asteropollis Auriculiidites Auriculopollenites Bacumorphomonocolpites Balanopollis Bignonia Brenneripollis Brevicolporites Ceratocarpus Constructipollenites Cornetipollis Crassitriapertites Crassitricolporites Cristaecolpites Cristaeturites Crusafontites Cupuliferoidaepollenites Dettmannaepollenites Dicolpopollis Dryadopollis Echitricolpites Foveomonocolpites Foveotetradites Foveotricolpites Fraxinoipollenites Hammenia Hexacolpites Holkopollenites Inaperturotetradites Integritetradites Intrareticulitis Jugella Lethomasites Microfoveotriporites Monocolpopollenites Multiporopollenites Nigeripollis Nyssapollenites Pediculisporis Penetetrapites Phimopollenites Pleurospermaepollenites Polycolpopollenites Polyporotetradites Protrudodiporites Psilabrevitricolpites Psilabrevitricolporites Psilamonocolpites Psilastephanocolpites Psilastephanocolporites Psilastephanoporites Psilatricolpites Ranunculacidites Retibrevitricolpites Retibrevitricolporites Retipollenites Retistephanocolpites Retistephanoporites Retisyncolporites Retitrescolpites Retitricolpites Scabratriporites Schrankipollis Senectotetradites Stephanoporopollenites Striatriporites Translucentipollis Tricolporoidites Trifossapollenites Triporites Triporotetradites Verrustephanocolporites Verrutricolpites