Asteridae is an obsolete botanical name at the rank of subclass. Composition of the subclass has also varied; however, by definition it always includes the family Asteraceae (Compositae). In the modern APG IV system of classification, asterid and euasterid are names for clades with a composition similar to that of Asteridae.
One of the better-known and more influential systems that formally recognized subclass Asteridae was the Cronquist system devised by botanist Arthur Cronquist, which included the orders:
Most of the above orders as defined by Cronquist have definitely been dramatically redefined on the basis of recent molecular systematic studies.
To a large extent Cronquist's subclass Asteridae corresponds with the older concepts of Sympetalae and Tubiflorae, groups that were defined by having their petals united into a tube. However, these older classifications contained some sympetalous families, such as Cucurbitaceae, that are now known not to be closely related. Cronquist's concept also corresponds closely with the APG II group of euasterids but the APG does not formally recognize a group called "Asteridae" (or any other group above the rank of order).
Recent phylogenetic studies have suggested that several families, including three major orders not included in Asteridae by Cronquist, Ericales, Cornales, and Apiales, also belong to the asterid group. The circumscription of subclass Asteridae, as well as the circumscriptions of the orders contained within it, is currently in a state of flux; many systematic botanists refer to these as clades (asterids, euasterids, etc.), rather than use formal names such as subclass Asteridae.
External linksedit
Asteridae 2008-05-16 at the Wayback Machine (Cronquist system)
Asterids
Phylogeny and the evolution of flower symmetry in the Asteridae
The Phylogeny of the Asteridae sensu lato Based on Chloroplast ndhF Gene Sequences (link to abstract)
Phylogeny of the Asteridae s. str. based on rbcL sequences, with particular reference to the Dipsacales[permanent dead link] (link to abstract)
October 27, 2023
asteridae, obsolete, botanical, name, rank, subclass, composition, subclass, also, varied, however, definition, always, includes, family, asteraceae, compositae, modern, system, classification, asterid, euasterid, names, clades, with, composition, similar, tha. Asteridae is an obsolete botanical name at the rank of subclass Composition of the subclass has also varied however by definition it always includes the family Asteraceae Compositae In the modern APG IV system of classification asterid and euasterid are names for clades with a composition similar to that of Asteridae One of the better known and more influential systems that formally recognized subclass Asteridae was the Cronquist system devised by botanist Arthur Cronquist which included the orders Gentianales Solanales Lamiales Callitrichales Plantaginales Scrophulariales Campanulales Rubiales Dipsacales Calycerales AsteralesMost of the above orders as defined by Cronquist have definitely been dramatically redefined on the basis of recent molecular systematic studies To a large extent Cronquist s subclass Asteridae corresponds with the older concepts of Sympetalae and Tubiflorae groups that were defined by having their petals united into a tube However these older classifications contained some sympetalous families such as Cucurbitaceae that are now known not to be closely related Cronquist s concept also corresponds closely with the APG II group of euasterids but the APG does not formally recognize a group called Asteridae or any other group above the rank of order Recent phylogenetic studies have suggested that several families including three major orders not included in Asteridae by Cronquist Ericales Cornales and Apiales also belong to the asterid group The circumscription of subclass Asteridae as well as the circumscriptions of the orders contained within it is currently in a state of flux many systematic botanists refer to these as clades asterids euasterids etc rather than use formal names such as subclass Asteridae External links editAsteridae Archived 2008 05 16 at the Wayback Machine Cronquist system Asterids Phylogeny and the evolution of flower symmetry in the Asteridae The Phylogeny of the Asteridae sensu lato Based on Chloroplast ndhF Gene Sequences link to abstract Phylogeny of the Asteridae s str based on rbcL sequences with particular reference to the Dipsacales permanent dead link link to abstract Retrieved from https en wikipedia org w index php title Asteridae amp oldid 1175192079, wikipedia, wiki, book, books, library,
