used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
[ Syn: pteridospermae , group pteridospermae , pteridospermaphyta , group pteridospermaphyta ]
used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
[ Syn: pteridospermae , group pteridospermae , pteridospermaphyta , group pteridospermaphyta ]