genus


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genus,

in taxonomy: see classificationclassification,
in biology, the systematic categorization of organisms into a coherent scheme. The original purpose of biological classification, or systematics, was to organize the vast number of known plants and animals into categories that could be named, remembered, and
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.

Genus

 

a major taxonomic category that phylogenetically unites closely related species. For example, various cat species (European wildcat, jungle cat, leopard cat) are united in the genus Felis. Various pine species (Scotch pine, Siberian pine) form the genus Pinus. The scientific name of a genus is designated by a single Latin word.

Genera may consist of many species. For example, some insect and plant genera contain hundreds or thousands of species. Some genera comprise only one or a few species.

Genera having only one species, such as Desmana or Welwitschia, are called monotypic. Genera with several species are often divided into subgenera, which unite especially closely related species. Each genus belongs to a family, but between these two taxonomic categories there are often intermediate ones. For example, tribes are grouped in subfamilies, which in turn are grouped in families.

In paleobotany there also are organ genera and formal genera.

V. G. GEPTNER and M. E. KIRPICHNIKOV

genus

[′jē·nəs]
(mathematics)
An integer associated to a surface which measures the number of holes in the surface.
(systematics)
A taxonomic category that includes groups of closely related species; the principal subdivision of a family.

genus

1. Biology any of the taxonomic groups into which a family is divided and which contains one or more species. For example, Vulpes (foxes) is a genus of the dog family (Canidae)
2. Logic a class of objects or individuals that can be divided into two or more groups or species
3. Maths a number characterizing a closed surface in topology equal to the number of handles added to a sphere to form the surface. A sphere has genus 0, a torus, genus 1, etc.
References in periodicals archive ?
So, it is over to our readers to help, and with Genus customers and IDMi readership covering archives and museums, who better to ask?
As recorded in many published phylogenic trees for oysters, the genus Crassostrea is monophyletic at a level of divergence comparable to the genera Ostrea, Saccostrea, and Striostrea.
Its technology is applicable across all livestock species and is currently commercialised by Genus in the dairy, beef and pork food production sectors.
The most commonly found genus of family Phlaeothripidae in the current study was genus Haplothrips.
Genus said the transaction will strengthen its position in the development and delivery of differentiated genetics in the bovine industry through the introduction of IVF technology.
Thanks to Maria Chudnovsky for suggesting series-parallel graphs as an interesting family of low-treewidth graphs for a genus distribution calculation.
Counting partitions of a given genus, greater than 1, seems surprisingly hard, considering the fact that, for permutations, a general machinery was built by S.
New genus and new subgenus of subfamily Doryctinae (Hymenoptera: Braconidae) from the Old World fauna.
A genus is a group of closely related species - in this case 19 species of ferns will carry the name Gaga.
Previous research had led to the discovery of Paedophryne by Kraus in 2002 from nearby areas in New Guinea, but the genus was not formally described until last year (Kraus 2010, also in Zookeys).
Each genus is illustrated by a black and white line-drawing.