Kingdom [Plantae] Haeckel (1866) - plants Division Gymnospermophyta Cleal (1994) - seed plants see Infraphylum Gymnospermae auct. Class † Order †Callistophytales Rothwell (1981) [monotypic] 1 Family †Callistophytaceae Stidd & J.W.Hall (1970), nom. cons. prop.