pteridospermaphyta

• Grupo taxonômico usado em alguns sistemas de classificação, referente a um grupo extinto de plantas com sementes que viveu nas eras Paleozoica e Mesozoica, equivalente à ordem Cycadofilicales.

A taxonomic group used in some classification systems, referring to an extinct division of seed plants that existed during the Paleozoic and Mesozoic eras, coextensive with the order Cycadofilicales.

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1. Extinct seed fernsC2formalscientific

   A group of extinct fossil gymnosperms, coextensive with the order Cycadofilicales, used in some classification systems.

   Samambaias com semente extintas

   • Pteridospermaphyta are known only from the fossil record of the Paleozoic era.
   • Scientists classify Pteridospermaphyta as an early group of seed plants.
   • The study of Pteridospermaphyta helps understand the evolution of gymnosperms.

   Sinônimoscycadofilicalespteridospermae