Everything about Division Biology totally explained
» This article discusses categorisations of organisms. For a different meaning in biology, see cell division.
Division is a
taxonomic rank in
biological classification.
In
botany and
mycology,
division refers to a rank equivalent to
phylum. The use of either term is allowed under the
International Code of Botanical Nomenclature, and both are commonly used in scientific literature.
The main divisions of land plants, in the order in which they probably evolved, are the
liverworts (Division Marchantiophyta), the
hornworts (Division Anthocerophyta), the
mosses (Division Bryophyta), the
ferns (Division Filicophyta), the
horsetails (Division Sphenophyta), the
cycads (Division Cycadophyta), the
ginkgo (Division Ginkgophyta), the
conifers (Division Pinophyta), the
gnetophytes (Division Gnetophyta), and the
angiosperms (Division Magnoliophyta). Angiosperms are the
flowering plants that now dominate terrestrial
ecosystems, comprising 80% of
vascular plant species.
In
zoology, the term
division is applied to an optional rank subordinate to the
infraclass and superordinate to the
cohort. A widely used classification (for example Carroll 1988) recognises
teleost fishes as a Division Teleostei within Class
Actinopterygii (the ray-finned fishes). Less commonly (as in Milner 1988), living
tetrapods are ranked as Divisions
Amphibia and
Amniota within the
clade of vertebrates with fleshy limbs (
Sarcopterygii).
Further Information
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