coniferophytina
Học thuậtThân thiện
Definition
- Noun:
- A taxonomic subdivision of cone-bearing gymnosperms: Coniferophytina is a scientific classification for a major group of seed-producing plants that bear cones. These plants are mostly substantial trees and have a long evolutionary history dating back to the Carboniferous period.
- A grouping within gymnosperms: It traditionally includes the classes Pinopsida (conifers like pines and firs), Ginkgopsida (the ginkgo tree), and Taxopsida (yews), along with both living and extinct orders.
Usage Examples
- Noun:
- The fossil record shows that Coniferophytina were dominant during the Mesozoic era.
- Botanists study the evolution of seed plants within the subdivision Coniferophytina.
Advanced Usage
- In taxonomic hierarchy: The term is used in formal botanical classification to group related cone-bearing plants above the level of class and below the division (phylum).
- The classification of Coniferophytina has been revised with modern genetic analysis.
Variants and Related Words
- Coniferophyta (n): Often used synonymously at the division level to refer to all conifers and their relatives.
- Pinophytina (n): A subdivision within Coniferophytina containing the classic conifers like pines and spruces.
- Gymnosperm (n): The broader category of seed plants that includes Coniferophytina, as well as cycads and gnetophytes.
Synonyms
- Coniferopsida: An alternative class-level name sometimes used for a similar grouping.
- Cone-bearing plants: A descriptive, non-scientific term for members of this group.
Notes on Meaning
- Scientific vs. Common Use: This is a specialized term used almost exclusively in scientific contexts like botany, paleobotany, and taxonomy. It is not used in everyday language.
- Evolutionary Context: The definition often references extinct orders (e.g., Cordaitales) to provide a complete evolutionary picture of the group.
Noun
- cone-bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida (subdivision Pinophytina) and Ginkgopsida (subdivision Ginkgophytina) and Taxopsida (subdivision Taxophytina) which in turn include the surviving orders Coniferales and Taxales (yews) and sometimes Ginkgoales as well as extinct orders such as Cordaitales (of the Carboniferous and Permian)