Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001) Division Ginkgophyta Bessey (1907) [monotypic] see Phylum Ginkgophyta Bessey (1907) Class Ginkgoopsida Engl. (1897) Order Ginkgoales Gorozh. (1904) [monotypic] Family Ginkgoaceae Engl. (1897), nom. cons. - maidenhair tree family Genus †Polyspermophyllum S.Archang. & Cúneo (1990)