- Pteridospermopsida, class Pteridospermopsida - extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
--1 is a kind of class
--1 is a member of
--1 has members:Gymnospermae, class Gymnospermae, Gymnospermophyta, division Gymnospermophyta Cycadofilicales, order Cycadofilicales, Lyginopteridales, order Lyginopteridales