The actual number of species in each group depends on the taxonomic classification followed.

The members of this group have a complex taxonomic history, having been assigned to widely differing families in different classification systems.

Under the Cronquist system of taxonomic classification of flowering plants Asteraceae was the only family in the group, but newer systems ( such as APG II and APG III ) have expanded it to eleven.

* Class ( biology ), a taxonomic rank in biological classification

The subdivision of Canidae into " foxes " and " true dogs " may not be in accordance with the actual relations ; also the taxonomic classification of several canines is disputed.

It is closely related to numerical taxonomy which is concerned with the use of numerical methods for taxonomic classification.

That is, plankton are defined by their ecological niche rather than phylogenetic or taxonomic classification.

The taxonomic classification of the red panda has been controversial since it was discovered.

Biological classification is a critical step in the taxonomic process, as it informs the user as to what the relatives of the taxon are hypothesized to be.

In the 1970s, the taxonomic classification of Cannabis took on added significance in North America.

Molecular analytical techniques developed in the late 20th century are being applied to questions of taxonomic classification.

In biology, a genus ( plural: genera ) is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia.

Between 335 BC – 322 BC, he provided the earliest taxonomic classification of fish, accurately describing 117 species of Mediterranean fish.

If genre functions as a taxonomic classification system, it could constrain individual creativity, since " the presence of many of the conventional features of a genre will allow a strong genre identification ; the presence of fewer features, or the presence of features of other genres, will result in a weak or ambiguous genre identification " ( Schauber 403 ).

Spore types can be used as taxonomic characters in the classification within the Ascomycota.

Although the published classification deliberately did not use formal taxonomic ranks, other sources have treated each of the six as a separate kingdom.

The taxonomic classification proposed by Brian Mathew in 1982 was based mainly on three character states:

# a taxonomic rank used in the classification of organisms.

Other taxonomic schemes have been proposed ; the most common putting the butterflies into the sub-order Ditrysia and then the " super-family " Papilionoidea, and ignoring a classification for moths.

The taxonomic placement of Welwitschia has changed many times with the development of new classification systems ( see Flowering plants: History of classification ).

Colloquial use of the term dog breed, however, does not conform to scientific standards of taxonomic classification.

Virus classification is the process of naming viruses and placing them into a taxonomic system.

The Code then defines a cultivar as a " taxonomic unit within the classification category of cultivar ".

The presence and morphology of the temporal fenestra are critical for taxonomic classification of the synapsids, of which mammals are part.

In 1991, after a major revision of the species and taxonomic characters, the herpetologists Pedro Ruiz-Carranza and John D. Lynch published a proposal for a taxonomic classification of the Centrolenidae based on cladistic principles and defining monophyletic groups.

He referred to the amoeba he observed microscopically as ' Amoeba coli '; however it is not clear whether he was using this as a descriptive term or intended it as a formal taxonomic name.

The last taxonomic delineation of the jaguar subspecies was performed by Pocock in 1939.

** A second hierarchy match algorithm was therefore created which uses the taxonomic hierarchies found in WordNet ( deep hierarchies ) and partially in LDOCE ( flat hierarchies ).

Simpson's idea was principally concerned with evolution at higher taxonomic groups.

In the early twentieth century the term was often used, in a taxonomic sense, to denote genetically differentiated human populations defined by phenotype.

Hardwicke's originally proposed taxonomic name was removed from the 1827 publication of his paper with his permission, and naming credit is now given to Cuvier.

Paeoniaceae possesses many unique features and its taxonomic position was for a long time controversial.

It was not until c. 1500 years later that taxonomic works became ambitious enough to replace the ancient texts.

However, this was not accepted by the taxonomic community at large ; the name S. harrisii has been retained and S. laniarius relegated to a fossil species.

The Cannabis genus was first classified using the " modern " system of taxonomic nomenclature by Carolus Linnaeus in 1753, who devised the system still in use for the naming of species.

In the early 20th century, the single-species concept was still widely accepted, except in the Soviet Union where Cannabis continued to be the subject of active taxonomic study.

This taxonomic interpretation was embraced by Cannabis aficionados who commonly distinguish narrow-leafed " sativa " drug strains from wide-leafed " indica " drug strains.

He was at least responsible for the taxonomic part of Johann Jacob Dillenius's Hortus Elthamensis and of Mark Catesby's Natural History of Carolina, Florida and the Bahama Islands.

Therefore, it would take over a century until Charles Darwin would provide the intellectual foundation from which we would be permitted to perceive that the degree of similarity in taxonomic features was a consequence of phylogenetic relationship.

The taxonomic term was first used by French botanist Pierre Magnol in his ( 1689 ) where he called the seventy-six groups of plants he recognised in his tables families ().

The name Ebola virus is derived from the Ebola River ( a river that was at first thought to be in close proximity to the area in Zaire where the first recorded Ebola virus disease outbreak occurred ) and the taxonomic suffix virus.

The name " Bengal cat " was derived from the taxonomic name of the Asian leopard cat ( P. b. bengalensis ), and not from the more distantly related Bengal tiger.

There are few taxonomic problems within the genus, but the Red-chested Swallow — a resident of West Africa, the Congo basin and Ethiopia — was formerly treated as a subspecies of Barn Swallow.

Until 1993, with the taxonomic changes proposed by Taylor, et al., the family Conidae contained only Conus species, but then the family was split into several subfamilies, including many which were previously in the family Turridae.

The taxonomic term Bivalvia was first used by Linnaeus in the 10th edition of his Systema Naturae in 1758 to refer to molluscs that had shells composed of two valves.

The taxonomic name Eucosmodontidae was given by Jepsen in 1940.

Long known to the Aboriginal people of Australia, for Europeans, the western grey was the centre of a great deal of sometimes comical taxonomic confusion for almost 200 years.