class Pteridospermopsida
extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies • Syn: Pteridospermopsida • Hypernyms: class • Member Holonyms: Gymnospermae, class Gymnospermae, Gymnospermophyta, division Gymnospermophyta • Member Meronyms: Cycadofilicales, order Cycadofilicales, Lyginopteridales, order Lyginopteridales
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