Extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies. Synonym: class Pteridospermopsida.
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Words linked to "Pteridospermopsida" : order Cycadofilicales, class, Lyginopteridales, Gymnospermae, class Gymnospermae, order Lyginopteridales, Gymnospermophyta, division Gymnospermophyta, Cycadofilicales |
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