Callistophytales G.W.Rothwell 1981 emend. nov.
Lyginopteridopsid plants with bilateral symmetrical ovules, and with nucellus free from integument except in the basal one-fifth of the ovule; ovules noncupulate, borne on abaxial surface of unmodified pinnules; nucellar beak lacks a cellular plug or column. Male: Pollen-bearing organs consisting of 2-8 basally fused sporangia