Pteridospermopsida

	Sponsored Links:
WordNet Dictionary
	Definition:		[n]  extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
	Synonyms:		class Pteridospermopsida
	See Also:		class, class Gymnospermae, Cycadofilicales, division Gymnospermophyta, Gymnospermae, Gymnospermophyta, Lyginopteridales, order Cycadofilicales, order Lyginopteridales