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Noun: class Pteridospermopsida
  1. Extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
    - Pteridospermopsida

Type of: class

Part of: class Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta

Nearest

class period
class Phaeophyceae
class Phasmidia
class Pinopsida
class Placodermi
class Plectomycetes
class Polychaeta
class Polyplacophora
class Psilopsida
class Psilotatae
class Pteridospermopsida
class Pyrenomycetes
class Reptilia
class Rhodophyceae
class Sarcodina
class Scaphopoda
class Schizomycetes
class Scyphozoa
class Sphenopsida
class Sporozoa
class structure