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 †Pteridospermatophyta Meyen Class †Moresnetiopsida Doweld (2001) Order †Pullarithecales Doweld (1998) Family †Austrocalyxaceae J.C. Vega & S.Archang. (2001) Genus †Austrocalyx J.C. Vega & S.Archang. (1996)