| 释义 |
class Pteridospermopsida
Thesaurus| Noun | 1.class Pteridospermopsida - extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and alliesPteridospermopsidaclass - (biology) a taxonomic group containing one or more ordersclass Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta - plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)Cycadofilicales, Lyginopteridales, order Cycadofilicales, order Lyginopteridales - fossil gymnospermous trees or climbing plants from the Devonian: seed ferns |
class Pteridospermopsida
Synonyms for class Pteridospermopsidanoun extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and alliesSynonymsRelated Words- class
- class Gymnospermae
- division Gymnospermophyta
- Gymnospermae
- Gymnospermophyta
- Cycadofilicales
- Lyginopteridales
- order Cycadofilicales
- order Lyginopteridales
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