WordNet: Pteridospermopsida, class Pteridospermopsida

extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies

• hypernym class

• member holonym Gymnospermae, Gymnospermophyta, class Gymnospermae, division Gymnospermophyta

Pteridospermopsida

• (suomi) Pteridospermopsida (synonyymi)

class Pteridospermopsida

• (suomi) Pteridospermopsida-luokka (synonyymi)