Kingdom [Plantae] Haeckel (1866) - plants
   Division Gymnospermophyta Cleal (1994) - seed plants see Infraphylum Gymnospermae auct.
     Class †
       Order †Leptostrobales S.V.Meyen (1987) [monotypic] see Order Czekanowskiales Novák (1972)
         1 Family †Leptostrobaceae S.V.Meyen (1978) see Family Czekanowskiaceae Samylina (1970)