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.
43-434: About 130, see text. Erythrina / ˌ ɛr ɪ ˈ θ r aɪ n ə / is a genus of plants in the pea family, Fabaceae . It contains about 130 species , which are distributed in tropical and subtropical regions worldwide. They are trees , with the larger species growing up to 30 m (98 ft) in height. These species are known for their large flowers with long and bright red or orange petals. The generic name
86-407: 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 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
129-643: 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
172-621: 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,
215-409: 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
258-427: 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. ;
301-455: 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
344-449: Is also found in Erythrina lysistemon and Erythrina afra . All species except the sterile hybrids E. × sykesii and E. × bidwillii have legume -type fruit, sometimes called pods, containing one or more seeds. The resilient buoyant seeds are often carried by the sea for large distances and are commonly called " sea beans ". Erythrina leaves are used as food plants by
387-452: Is derived from the Greek word ερυθρóς erythros , meaning "red", referring to the flower color of certain species. Particularly in horticulture , the name coral tree is used as a collective term for these plants. Flame tree is another vernacular name, but may refer to a number of unrelated plants as well. Many species of Erythrina have bright red flowers, and this may be the origin of
430-596: 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
473-460: 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,
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#1732892043316516-474: 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
559-658: The Bengal region, they are used for the same purpose in Schumannianthus dichotoma plantations. E. lanceolata in particular is considered highly suitable as "frame" tree for vanilla vines to grow up on. Native Hawaiians made a number of items from wiliwili wood because of its low density, such as mouo ( fishing net floats), ama ( outrigger canoe floats, and extremely long papa heʻe nalu ( surfboards ) called olo . Olo , which averaged 18 feet (5.5 m), were exclusively ridden by aliʻi (royalty). The wood
602-621: 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
645-799: 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;
688-592: The Northern Territory of Australia. In Vietnam , people use the leaves of E. variegata to wrap nem chua (a kind of fermented pork wrapped in banana leaves). Horticultural hybrids : Growing, selling or possessing Erythrina spp. except for ornamental purposes, is prohibited by Louisiana State Act 159 (where the genus is misspelled Erythina ); the Act covers various known, suspected, or rumored hallucinogenic plants. Genus The composition of
731-497: The black-throated ( Anthracothorax nigricollis ) and green-breasted mangos ( A. prevostii ) – though they seem not to be especially fond of E. speciosa at least, which they visit rather opportunistically. In Southeast Asia , the black drongo ( Dicrurus macrocercus ) which usually does not eat nectar in quantity has been observed feeding on E. suberosa flowers, and mynas and of course more specialized nectar feeders also utilize coral tree flowers. Lorikeets such as
774-423: The collared lory ( Phigys solitarius ) and the possibly extinct New Caledonian lorikeet ( Charmosyna diadema ) are known to consume (or have consumed) large amounts of Erythrina nectar. Some coral trees are used widely in the tropics and subtropics as street and park trees, especially in drier areas. In some places, such as Venezuela , bucaré s are used as shade trees for coffee or cocoa crops. In
817-494: The larvae of some Lepidoptera species including the swift moth Endoclita damor and the woolly bears Hypercompe eridanus and Hypercompe icasia . The mite Tydeus munsteri is a pest on the coastal coral tree ( E. afra ). Many birds visit the nectar -rich Erythrina flowers. In the Neotropics , these are usually larger hummingbirds , for example the swallow-tailed hummingbird ( Eupetomena macroura ) and
860-419: 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 ,
903-404: 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,
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#1732892043316946-442: 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
989-590: The common name. However, the growth of the branches can resemble the shape of sea coral rather than the color of Corallium rubrum specifically, and this is an alternative source for the name. Other popular names, usually local and particular to distinct species, liken the flowers' red hues to those of a male chicken 's wattles , and/or the flower shape to its leg spurs. Commonly seen Spanish names for any local species are bucaré , frejolillo or porotillo , and in Afrikaans some are called kafferboom (from
1032-446: 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
1075-727: 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,
1118-628: 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,
1161-619: The latter species is also one of the thong ("trees") referred to in the name of Amphoe Chom Thong, Chiang Mai Province . In a similar vein, Zumpahuacán in Mexico derives its name from Nahuatl tzompahuacá , "place of the Erythrina americana ". In Hinduism , the mandāra tree in Indra 's garden in Svarga is held to be E. stricta . The same motif is found in Indo-Tibetan Buddhism , where
1204-537: 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. Erythrina suberosa Erythrina suberosa , the corky coral tree , is a species of flowering plant in the family Fabaceae . It is native to the Indian Subcontinent (except Assam), Southeast Asia (except Laos), and Peninsular Malaysia. Due to its showy flowers and habit of flowering most of
1247-785: The mandāravā ( Tib. man dā ra ba ) growing in Sukhāvatī is identified as an Indian coral tree ( E. variegata ). The concept of the Five Trees of Paradise is also found in Christian Gnosticism . Though as none of the trees is identified as an Erythrina here, the concept might not be as directly related to the Asian religions as some presume. The seeds of at least one-third of the species contain potent erythrina alkaloids , and some of these are used for medicinal and other purposes by indigenous peoples. They are all toxic to some degree, however, and
1290-403: 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
1333-428: 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
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1376-698: The official city tree of Los Angeles , California , where it is referred to simply as the "coral tree". The state trees of Mérida and Trujillo in Venezuela are bucaré ceibo ( E. poeppigiana ) and purple coral tree ( bucaré anauco, E. fusca ), respectively. Yonabaru, Okinawa as well as the Okinawa Prefecture , Quanzhou , Fujian Province and Pathum Thani Province have the Indian coral tree ( E. variegata ) as floral emblems. Known as thong lang in Thailand ,
1419-526: 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
1462-466: 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 the French botanist Joseph Pitton de Tournefort (1656–1708) is considered "the founder of the modern concept of genera". The scientific name (or
1505-408: 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 a species : see Botanical name and Specific name (zoology) . The rules for the scientific names of organisms are laid down in
1548-446: The seeds of some can cause fatal poisoning. The chemical compounds found in plants in this genus include alkaloids such as scoulerine , erysodin , erysovin (namely in E. flabelliformis ), and the putative anxiolytic erythravine (isolated from Mulungu , E. mulungu ). Erysodienone is a precursor in the biosynthesis of many of these alkaloids. Root tubers of Erythrina species have been traditional food for aborigines of
1591-620: The species name Erythrina caffra ). Mullumurikku is a widespread name in Kerala . A flower of most known Erythrina species is made of long top petals that fold into a boat or spade shape and curve backwards from the stem while the bottom petals enclose its stamens; both together make almost a butterfly shape. Not all of them flower in just bright red; the wiliwili ( E. sandwicensis ) has extraordinary variation in its flower colour, with orange, yellow, salmon, green and white all being found within natural populations. This striking color polymorphism
1634-497: 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,
1677-412: 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
1720-403: 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
1763-566: 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
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1806-429: 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
1849-399: Was sometimes used for the waʻa (hull) of outrigger canoes intended to be used near-shore, for recreation, or for training. The shiny orange-red seeds were strung into lei . The conspicuous, even dramatic coral trees are widely used as floral emblems . cockspur coral tree ( E. crista-galli ) is the national flower of Argentina and Uruguay . The coastal coral tree ( E. afra ) is
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