Definition

Noun: - A taxonomic group in some classification systems: This term refers to a category used in certain scientific classification schemes to encompass an assemblage of extinct fossil gymnosperm plants. This group is considered equivalent in scope to the order Cycadofilicales.

Usage

• The term is used specifically in the context of paleobotanical taxonomy to classify a set of extinct seed plants known as seed ferns.
• It is a technical, historical classification term. Modern classifications may use different groupings.

Examples

• group Pteridospermae
• group Pteridospermae,

Advanced Usage

• The term is often used synonymously with "pteridosperms" or "seed ferns" in a general sense, though technically it refers to a specific formal grouping in certain classification systems.

Variants and Related Words

• Pteridospermae (noun): Often used interchangeably as the name of the group itself.
• Pteridosperm (noun): A member of this group; an extinct seed plant with fern-like foliage.
• Cycadofilicales (noun): The order considered coextensive with this group.
• Seed fern (noun): The common name for plants belonging to this group.

Synonyms

• Seed ferns (common name)
• Pteridosperms (scientific common term)
• Order Cycadofilicales (equivalent taxonomic rank in other systems)

Noun

1. used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales