Genus ( / ˈ dʒ iː n ə s / ; pl. : genera / ˈ dʒ ɛ n ər ə / ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses . In binomial nomenclature , the genus name forms the first part of the binomial species name for each species within the genus.
45-471: Ribes ( / ˈ r aɪ b iː z / ) is a genus of about 200 known species of flowering plants , most of them native to the temperate regions of the Northern Hemisphere . The species may be known as various kinds of currants, such as redcurrants , blackcurrants , and whitecurrants , or as gooseberries , and some are cultivated for their edible fruit or as ornamental plants . Ribes
90-557: A species : see Botanical name and Specific name (zoology) . The rules for the scientific names of organisms are laid down in the nomenclature codes , which allow each species a single unique name that, for animals (including protists ), plants (also including algae and fungi ) and prokaryotes ( bacteria and archaea ), is Latin and binomial in form; this contrasts with common or vernacular names , which are non-standardized, can be non-unique, and typically also vary by country and language of usage. Except for viruses ,
135-651: A later homonym of a validly published name is a nomen illegitimum or nom. illeg. ; for a full list refer to the International Code of Nomenclature for algae, fungi, and plants and the work cited above by Hawksworth, 2010. In place of the "valid taxon" in zoology, the nearest equivalent in botany is " correct name " or "current name" which can, again, differ or change with alternative taxonomic treatments or new information that results in previously accepted genera being combined or split. Prokaryote and virus codes of nomenclature also exist which serve as
180-628: A long time and redescribed as new by a range of subsequent workers, or if a range of genera previously considered separate taxa have subsequently been consolidated into one. For example, the World Register of Marine Species presently lists 8 genus-level synonyms for the sperm whale genus Physeter Linnaeus, 1758, and 13 for the bivalve genus Pecten O.F. Müller, 1776. Within the same kingdom, one generic name can apply to one genus only. However, many names have been assigned (usually unintentionally) to two or more different genera. For example,
225-432: A number of sections to produce a taxonomy of seven subgenera; Ribes (sections Ribes , Heretiera , Berisia ) Coreosma , Calobotrya (sections Calobotrya , Cerophyllum ), Symphocalyx , Grossularioides , Grossularia , Parilla . Taxonomy, according to Berger, modified by Sinnott (1985): Some authors continued to treat Hesperia and Lobbia as subgenera. Early molecular studies suggested that subgenus Grossularia
270-409: A reference for designating currently accepted genus names as opposed to others which may be either reduced to synonymy, or, in the case of prokaryotes, relegated to a status of "names without standing in prokaryotic nomenclature". An available (zoological) or validly published (botanical) name that has been historically applied to a genus but is not regarded as the accepted (current/valid) name for
315-495: A strong resinous scent. The flowers are produced in early spring at the same time as the leaves emerge, on dangling racemes 3–7 cm (1–3 in) long of 5–30 flowers; each flower is 5–10 millimetres ( 1 ⁄ 4 – 3 ⁄ 8 in) in diameter, with five red or pink petals. The fruit is a dark purple oval berry about 1 cm ( 3 ⁄ 8 in) long, edible but with an insipid taste. The Latin specific epithet sanguineum means 'blood-red'. It
360-427: A taxon; however, the names published in suppressed works are made unavailable via the relevant Opinion dealing with the work in question. In botany, similar concepts exist but with different labels. The botanical equivalent of zoology's "available name" is a validly published name . An invalidly published name is a nomen invalidum or nom. inval. ; a rejected name is a nomen rejiciendum or nom. rej. ;
405-455: A total of c. 520,000 published names (including synonyms) as at end 2019, increasing at some 2,500 published generic names per year. "Official" registers of taxon names at all ranks, including genera, exist for a few groups only such as viruses and prokaryotes, while for others there are compendia with no "official" standing such as Index Fungorum for fungi, Index Nominum Algarum and AlgaeBase for algae, Index Nominum Genericorum and
450-533: Is shade tolerant but prefers sunny sites. It tolerates drought well, but prefers cool and moist conditions. Red-flowering currant has been an invasive species in New Zealand since it was naturalized in 1904, where it forms dense stands in shrublands and along waterways which crowd out native vegetation. It is considered a 'significant environmental weed' in Tasmania , though only a minor problem as it
495-612: Is discouraged by both the International Code of Zoological Nomenclature and the International Code of Nomenclature for algae, fungi, and plants , there are some five thousand such names in use in more than one kingdom. For instance, A list of generic homonyms (with their authorities), including both available (validly published) and selected unavailable names, has been compiled by the Interim Register of Marine and Nonmarine Genera (IRMNG). The type genus forms
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#1732780394740540-498: Is insufficient resolution to justify further taxonomic revision. There are around 200 species of Ribes . Selected species include: Ribes is widely distributed through the Northern Hemisphere, and also extending south in the mountainous areas of South America. Species can be found in meadows or near streams. Currants are used as food plants by the larvae of some Lepidoptera species. The genus Ribes includes
585-535: Is native to the western United States, Canada and Mexico. In western British Columbia , Washington, and Oregon, it is distributed widely in the moist regions west of the Cascades . In California it is restricted to areas near the coast, and can be found as far south as Santa Barbara County. In Mexico, it is only found on the Pacific island of Guadalupe , where it may be extirpated. Although its conservation status
630-672: Is not widespread. R. sanguineum was introduced into cultivation in Britain in the fall of 1826 by Scottish botanist David Douglas , via seeds he had sent back during his explorations for the Royal Horticultural Society in the Pacific Northwest. It and its varieties and cultivars became immediately popular among English gardeners. The noted botanist and RHS member John Lindley remarked: ...of such importance do we consider [red-flowering currant] to
675-551: Is secure across the rest of its range, in Idaho it is critically imperiled and is found only rarely in Bonner , Kootenai , Benewah , and Adams counties. It is widely cultivated and naturalized throughout temperate Europe and Australasia. The early spring nectar of red-flowering currant is used by hummingbirds as well as butterflies, which along with moths browse the leaves in their larval stage. Deer and elk occasionally browse
720-460: Is somewhat arbitrary. Although all species within a genus are supposed to be "similar", there are no objective criteria for grouping species into genera. There is much debate among zoologists about whether enormous, species-rich genera should be maintained, as it is extremely difficult to come up with identification keys or even character sets that distinguish all species. Hence, many taxonomists argue in favor of breaking down large genera. For instance,
765-474: Is the type species , and the generic name is permanently associated with the type specimen of its type species. Should the specimen turn out to be assignable to another genus, the generic name linked to it becomes a junior synonym and the remaining taxa in the former genus need to be reassessed. In zoological usage, taxonomic names, including those of genera, are classified as "available" or "unavailable". Available names are those published in accordance with
810-401: Is the only genus in the family Grossulariaceae . Ribes species are medium shrublike plants with marked diversity in strikingly diverse flowers and fruit. They have either palmately lobed or compound leaves, and some have thorns. The sepals of the flowers are larger than the petals, and fuse into a tube or saucer shape. The ovary is inferior, maturing into a berry with many seeds. Ribes
855-581: Is the single genus in the Saxifragales family Grossulariaceae. Although once included in the broader circumscription of Saxifragaceae sensu lato , it is now positioned as a sister group to Saxifragaceae sensu stricto . First treated on a worldwide basis in 1907, the infrageneric classification has undergone many revisions, and even in the era of molecular phylogenetics there has been contradictory evidence. Although sometimes treated as two separate genera, Ribes and Grossularia (Berger 1924),
900-621: The International Code of Zoological Nomenclature ; the earliest such name for any taxon (for example, a genus) should then be selected as the " valid " (i.e., current or accepted) name for the taxon in question. Consequently, there will be more available names than valid names at any point in time; which names are currently in use depending on the judgement of taxonomists in either combining taxa described under multiple names, or splitting taxa which may bring available names previously treated as synonyms back into use. "Unavailable" names in zoology comprise names that either were not published according to
945-824: The International Plant Names Index for plants in general, and ferns through angiosperms, respectively, and Nomenclator Zoologicus and the Index to Organism Names for zoological names. Totals for both "all names" and estimates for "accepted names" as held in the Interim Register of Marine and Nonmarine Genera (IRMNG) are broken down further in the publication by Rees et al., 2020 cited above. The accepted names estimates are as follows, broken down by kingdom: The cited ranges of uncertainty arise because IRMNG lists "uncertain" names (not researched therein) in addition to known "accepted" names;
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#1732780394740990-404: The platypus belongs to the genus Ornithorhynchus although George Shaw named it Platypus in 1799 (these two names are thus synonyms ) . However, the name Platypus had already been given to a group of ambrosia beetles by Johann Friedrich Wilhelm Herbst in 1793. A name that means two different things is a homonym . Since beetles and platypuses are both members of the kingdom Animalia,
1035-473: The French botanist Joseph Pitton de Tournefort (1656–1708) is considered "the founder of the modern concept of genera". The scientific name (or the scientific epithet) of a genus is also called the generic name ; in modern style guides and science, it is always capitalised. It plays a fundamental role in binomial nomenclature , the system of naming organisms , where it is combined with the scientific name of
1080-442: The base for higher taxonomic ranks, such as the family name Canidae ("Canids") based on Canis . However, this does not typically ascend more than one or two levels: the order to which dogs and wolves belong is Carnivora ("Carnivores"). The numbers of either accepted, or all published genus names is not known precisely; Rees et al., 2020 estimate that approximately 310,000 accepted names (valid taxa) may exist, out of
1125-457: The consensus has been to consider it as a single genus, divided into a number of subgenera , the main ones of which are subgenus Ribes (currants) and subgenus Grossularia (gooseberries), further subdivided into sections. Janczewski (1907) considered six subgenera and eleven sections. Berger's twelve subgenera based on two distinct genera (see Senters & Soltis (2003) Table 1) have subsequently been demoted to sections. Weigend (2007) elevated
1170-535: The edible currants: blackcurrant , redcurrant , and white currant , as well as the European gooseberry, Ribes uva-crispa , and several hybrid varieties. It should not be confused with the dried currants used in cakes and puddings, which are from the Zante currant , a small-fruited cultivar of the grape Vitis vinifera . Ribes gives its name to the popular blackcurrant cordial Ribena . The genus also includes
1215-752: The embellishment of our gardens, that if the expense incurred by the Horticultural Society in Mr. Douglas' voyage had been attended with no other result than the introduction of this species, there would have been no ground for dissatisfaction. -John Lindley, quoted in The Collector by Jack Nisbet It remains a popular garden shrub, valued for its brightly colored and scented flowers in early spring, and birds and habitat support. Numerous cultivars have been selected with flowers ranging from white to dark red. The following cultivars have gained
1260-446: The form "author, year" in zoology, and "standard abbreviated author name" in botany. Thus in the examples above, the genus Canis would be cited in full as " Canis Linnaeus, 1758" (zoological usage), while Hibiscus , also first established by Linnaeus but in 1753, is simply " Hibiscus L." (botanical usage). Each genus should have a designated type , although in practice there is a backlog of older names without one. In zoology, this
1305-631: The fruit of Ribes glandulosum as a fertility enhancer to assist women in becoming pregnant. European immigrants who settled in North America in the 18th century typically made wine from both red and white currants. [REDACTED] Media related to Ribes at Wikimedia Commons Genus The composition of a genus is determined by taxonomists . The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including
1350-737: The generic name (or its abbreviated form) still forms the leading portion of the scientific name, for example, Canis lupus lupus for the Eurasian wolf subspecies, or as a botanical example, Hibiscus arnottianus ssp. immaculatus . Also, as visible in the above examples, the Latinised portions of the scientific names of genera and their included species (and infraspecies, where applicable) are, by convention, written in italics . The scientific names of virus species are descriptive, not binomial in form, and may or may not incorporate an indication of their containing genus; for example,
1395-419: The group of ornamental plants collectively known as the flowering currants, for instance, R. sanguineum . There are restrictions on growing some Ribes species in some U.S. states, as they are the main alternate host for white pine blister rust . Blackfoot people used blackcurrant root ( Ribes hudsonianum ) for the treatment of kidney diseases and menstrual and menopausal problems. The Cree used
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1440-432: The idea that a newly defined genus should fulfill these three criteria to be descriptively useful: Moreover, genera should be composed of phylogenetic units of the same kind as other (analogous) genera. The term "genus" comes from Latin genus , a noun form cognate with gignere ('to bear; to give birth to'). The Swedish taxonomist Carl Linnaeus popularized its use in his 1753 Species Plantarum , but
1485-633: The largest component, with 23,236 ± 5,379 accepted genus names, of which 20,845 ± 4,494 are angiosperms (superclass Angiospermae). By comparison, the 2018 annual edition of the Catalogue of Life (estimated >90% complete, for extant species in the main) contains currently 175,363 "accepted" genus names for 1,744,204 living and 59,284 extinct species, also including genus names only (no species) for some groups. The number of species in genera varies considerably among taxonomic groups. For instance, among (non-avian) reptiles , which have about 1180 genera,
1530-533: The leaves, and the berries are consumed by birds and small mammals. Its branches provide nesting habitat for birds. The species is a host to white pine blister rust , which led to eradication efforts in the early to mid 20th century. From the 1920s the genus Ribes was federally restricted within the United States until the ban was lifted in 1966 due to increased resistance among both Ribes and Western white pine populations. Red-flowering currant
1575-405: The lizard genus Anolis has been suggested to be broken down into 8 or so different genera which would bring its ~400 species to smaller, more manageable subsets. Ribes sanguineum Ribes sanguineum , the flowering currant , redflower currant , red-flowering currant , or red currant is a North American species of flowering plant in the family Grossulariaceae, native to
1620-403: The most (>300) have only 1 species, ~360 have between 2 and 4 species, 260 have 5–10 species, ~200 have 11–50 species, and only 27 genera have more than 50 species. However, some insect genera such as the bee genera Lasioglossum and Andrena have over 1000 species each. The largest flowering plant genus, Astragalus , contains over 3,000 species. Which species are assigned to a genus
1665-428: The name could not be used for both. Johann Friedrich Blumenbach published the replacement name Ornithorhynchus in 1800. However, a genus in one kingdom is allowed to bear a scientific name that is in use as a generic name (or the name of a taxon in another rank) in a kingdom that is governed by a different nomenclature code. Names with the same form but applying to different taxa are called "homonyms". Although this
1710-541: The provisions of the ICZN Code, e.g., incorrect original or subsequent spellings, names published only in a thesis, and generic names published after 1930 with no type species indicated. According to "Glossary" section of the zoological Code, suppressed names (per published "Opinions" of the International Commission of Zoological Nomenclature) remain available but cannot be used as the valid name for
1755-497: The specific name particular to the wolf. A botanical example would be Hibiscus arnottianus , a particular species of the genus Hibiscus native to Hawaii. The specific name is written in lower-case and may be followed by subspecies names in zoology or a variety of infraspecific names in botany . When the generic name is already known from context, it may be shortened to its initial letter, for example, C. lupus in place of Canis lupus . Where species are further subdivided,
1800-412: The standard format for a species name comprises the generic name, indicating the genus to which the species belongs, followed by the specific epithet, which (within that genus) is unique to the species. For example, the gray wolf 's scientific name is Canis lupus , with Canis ( Latin for 'dog') being the generic name shared by the wolf's close relatives and lupus (Latin for 'wolf') being
1845-403: The taxon is termed a synonym ; some authors also include unavailable names in lists of synonyms as well as available names, such as misspellings, names previously published without fulfilling all of the requirements of the relevant nomenclatural code, and rejected or suppressed names. A particular genus name may have zero to many synonyms, the latter case generally if the genus has been known for
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1890-576: The values quoted are the mean of "accepted" names alone (all "uncertain" names treated as unaccepted) and "accepted + uncertain" names (all "uncertain" names treated as accepted), with the associated range of uncertainty indicating these two extremes. Within Animalia, the largest phylum is Arthropoda , with 151,697 ± 33,160 accepted genus names, of which 114,387 ± 27,654 are insects (class Insecta). Within Plantae, Tracheophyta (vascular plants) make up
1935-429: The virus species " Salmonid herpesvirus 1 ", " Salmonid herpesvirus 2 " and " Salmonid herpesvirus 3 " are all within the genus Salmonivirus ; however, the genus to which the species with the formal names " Everglades virus " and " Ross River virus " are assigned is Alphavirus . As with scientific names at other ranks, in all groups other than viruses, names of genera may be cited with their authorities, typically in
1980-470: The western United States and Canada. It is a deciduous shrub growing to 3 metres (10 feet) tall and broad. It is naturally multi-stemmed with an upright-arching to rounded habit , although it can be grown in tree form. The bark is dark brownish-grey with prominent paler brown lenticels . The leaves are of alternate arrangement , simple, 2–7 centimetres (1–3 inches) long and broad, palmately lobed with five lobes. When young in spring, they have
2025-488: Was actually embedded within subgenus Ribes . Analysis of combined molecular datasets confirms subgenus Grossularia as a monophyletic group, with two main lineages, sect. Grossularia and another clade consisting of glabrous gooseberies, including Hesperia , Lobbia and Robsonia . Other monophyletic groups identified were Calobotrya , Parilla , Symphocalyx and Berisia . However sections Ribes , Coreosma and Heritiera were not well supported. Consequently, there
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