nomenclatorial act:
subsequent publication
Page:
104
diagnosis:
Callistophytalean plants with ovule enclosed by integument except for the micropyle; ovules attached medially to lateral veins. Male: Pollen-bearing organs, consisting of 6-8 sporangia, attached to abaxial surface of unmodified pinnules; prepollen monosaccate of the Vesicaspora-type. Foliage: ronds bipartite, each branch tripinnately divided. Stems: eustelic with secretory system composed of spherical cavities lined with epithelium.
systematic position:
Lyginopteridopsida, Callistophytales
Classification:
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