genera


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genera,

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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References in periodicals archive ?
The acquisition of Genera is an ideal fit for our water testing business.
Since ICTV study groups (12) are mostly responsible for deciding which virus species should be recognized within individual genera and families, these specialty groups, with their in-depth knowledge of particular areas in virology, have been given the task of establishing which diagnostic properties are most useful for species demarcation.
In the so-called Linnaean hierarchy, Linnaeus stacked similar genera into groups, then put those groups into bigger sets.
During that span, the number of marine families bloomed from 160 to 530, while the number of genera ballooned from 470 to 1,580.
Seven kinds of columbines also have abandoned bees for birds, but most of the other 16 genera with hummingbird pollinators are very recent converts, with just one or two species in each making use of these birds, he adds.
To assess the extinction pattern, Raup and Jablonski analyzed the distribution of 340 genera of bivalves living at 106 sites around the globe during the last 8 million years of the Cretaceous period.
But cladistics often cannot resolve controversies about genera or species within an evolutionary family, he maintains.
Researchers have described about 550 dinosaur genera over the last 170 years, with the rate of new discoveries accelerating greatly during the last two decades.
These two genera fall in the category of gram-positive bacteria, based on their ability to bind a stain commonly used in microscopy.
Creating three (new) genera (the Atlantic clade of Crassostrea, Magallana, and Talonostrea) is not the preferred solution to this problem of paraphyly.
Following taxonomic keys, we identified 12 species from 3 genera of the suborder Tubulifera and 30 species from 17 genera of the suborder Terebrantia.
Originally, the vernacular tenu "bunyavirus" was used for viruses in this genus, but as more genera were added to Bunyaviridae (there are currently 5), confusion arose over whether "bunyavirus" referred to members of the genus Bunyavirus or family Bunyaviridae.