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Chamaecyparis Eureka
''Chamaecyparis eureka'' is an extinct species of conifer in the family Cupressaceae. It is known from fossil foliage found in the Buchanan Lake Formation deposits, dated to the middle Eocene Lutetian stage (), from western Axel Heiberg Island, located in the Arctic Ocean in the Qikiqtaaluk Region, Nunavut, Canada. ''C. eureka'' is the oldest confirmed member of the genus '' Chamaecyparis'', which includes five to six living species, depending on circumscription, which are native to Eastern Asia, Japan, and North America. Description of the new species by M. E. A. Kotyk, James Basinger, and Elisabeth McIver was based on the study of more than 850 twigs and 650 seed cone specimens; the holotype specimen, number "USPC-6357", and the five paratypes are housed in the University of Saskatchewan Paleobotanical Collection, Saskatoon, Saskatchewan, Canada. They published their 2003 type description of the species in the ''Canadian Journal of Botany'' volume number 81. and named the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lutetian
The Lutetian is, in the geologic timescale, a stage or age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it is sometimes referred to as the Middle Eocene Subepoch. Stratigraphic definition The Lutetian was named after Lutetia, the Latin name for the city of Paris. The Lutetian Stage was introduced in scientific literature by French geologist Albert de Lapparent in 1883 and revised by A. Blondeau in 1981. The base of the Lutetian Stage is at the first appearance of the nanofossil ''Blackites inflatus'', according to an official reference profile (GSSP) established in 2011. Of two candidates located in Spain, the Gorrondatxe section was chosen.See thwebsite of Eustoquio Molinafor these candidates. The top of the Lutetian (the base of the Bartonian) is at the first appearance of calcareous nanoplankton species ''Reticulofenestra reticulata''. The Lutetian overlaps with the Geisel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene Plants
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Described In 2003
Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). By one definition, plants form the clade Viridiplantae (Latin name for "green plants") which is sister of the Glaucophyta, and consists of the green algae and Embryophyta (land plants). The latter includes the flowering plants, conifers and other gymnosperms, ferns and their allies, hornworts, liverworts, and mosses. Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic or mycotrophic and have lost the ability ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaecyparis Lawsoniana
''Chamaecyparis lawsoniana'', known as Port Orford cedar or Lawson cypress, is a species of conifer in the genus ''Chamaecyparis'', family Cupressaceae. It is native to Oregon and northwestern California, and grows from sea level up to in the valleys of the Klamath Mountains, often along streams. Description A large evergreen tree, specimens mature up to tall or more, with trunks in diameter, exceptionally . The bark is silver-brown, vertically furrowed, and thick near the base. The foliage is arranged in lacy, flat sprays with a feathery appearance, usually somewhat glaucous (i.e. blue-green) in color. The leaves are scale-like, long, with narrow white markings on the underside, and produced on somewhat flattened shoots. The foliage gives off a rather pungent scent, not unlike parsley. The seed cones are globose, in diameter, with 6–10 scales, green at first, maturing brown in early fall, 6–8 months after pollination. The male cones are long, dark red, turning brow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaecyparis Pisifera
''Chamaecyparis pisifera'' (Sawara cypress or Sawara ja, サワラ , translit=Sawara) is a species of false cypress, native to central and southern Japan, on the islands of Honshū and Kyūshū.Farjon, A. (2005). ''Monograph of Cupressaceae and Sciadopitys''. Royal Botanic Gardens, Kew. Description It is a slow-growing coniferous tree growing to 35–50 m tall with a trunk up to 2 m in diameter. The bark is red-brown, vertically fissured and with a stringy texture. The foliage is arranged in flat sprays; adult leaves are scale-like, 1.5–2 mm long, with pointed tips (unlike the blunt tips of the leaves of the related '' Chamaecyparis obtusa'' (hinoki cypress), green above, green below with a white stomatal band at the base of each scale-leaf; they are arranged in opposite decussate pairs on the shoots. The juvenile leaves, found on young seedlings, are needle-like, 4–8 mm long, soft and glaucous bluish-green. The cones are globose, 4–8 mm diameter, with 6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fokienia
''Fokienia'' is a genus of conifer tree belonging to the cypress family. In its characteristics, ''Fokienia'' is intermediate between the genera of ''Chamaecyparis'' and ''Calocedrus''. Genetically ''Fokienia'' is much closer to ''Chamaecyparis'', and not all researchers recognize ''Fokienia'' as a separate genus. The genus comprises only one living species, ''Fokienia hodginsii'' or Fujian cypress (; vi, Pơmu, links=no), and one fossil species (''Fokienia ravenscragensis''). ''Fokienia hodginsii'' is native from southeastern China (provinces of Zhejiang, Guizhou, Yunnan and Fujian) to Northern Vietnam (provinces of Ha Bac, Hà Giang, Hà Tĩnh, Hòa Bình, Sơn La, Nghệ An, Lào Cai, Lai Châu, Thanh Hóa, Tuyên Quang, Yên Bái and Vĩnh Phú), west central Vietnam (provinces of Đắk Lắk, Gia Lai, Lâm Đồng), and west to northern Laos. The name derives from the old Romanised name of Fujian province, China, from where the first specimen was introduced to Europ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupressus
''Cupressus'' is one of several genera of evergreen conifers within the family Cupressaceae that have the common name cypress; for the others, see cypress. It is considered a polyphyletic group. Based on genetic and morphological analysis, the genus ''Cupressus'' is found in the subfamily Cupressoideae. The common name "cypress" comes via the Old French ''cipres'' from the Latin ''cyparissus'', which is the latinisation of the Greek κυπάρισσος (''kypárissos''). Taxonomy There has long been significant uncertainty about the New World members of ''Cupressus'', with several studies recovering them as forming a distinct clade from the Old World members. A 2021 molecular study found ''Cupressus'' to be the sister genus to ''Juniperus'', whereas the western members (classified in '' Callitropsis'' and ''Hesperocyparis'') were found to be sister to ''Xanthocyparis''. Description They are evergreen trees or large shrubs, growing to 5–40 m tall. The leaves are scale-lik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eureka Sound Group
The Eureka Sound Group is a geologic group in Nunavut. It preserves fossils dating back to the Paleogene period. See also * List of fossiliferous stratigraphic units in Nunavut This is a list of fossiliferous stratigraphic units in Nunavut, Canada. References * {{Lists of fossiliferous stratigraphic units in Canada Nunavut Nunavut ( , ; iu, ᓄᓇᕗᑦ , ; ) is the largest and northernmost territory of C ... References * Paleogene Nunavut {{Nunavut-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Journal Of Botany
''Botany'' is a monthly peer-reviewed scientific journal that is published by Canadian Science Publishing. It was established in 1935 as the ''Canadian Journal of Research, Section C: Botanical Sciences'' and renamed in 1951 as ''Canadian Journal of Botany''. It covers research on all aspects of botany. The journal was selected as one of the DBIO 100, the 100 most influential journals in biology and medicine over the last 100 years, as voted by the BioMedical & Life Sciences Division of the Special Libraries Association on the occasion of its centennial. The are [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type (biology)
In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the scientific name of every taxon is almost al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saskatoon
Saskatoon () is the largest city in the Provinces and territories of Canada, Canadian province of Saskatchewan. It straddles a bend in the South Saskatchewan River in the central region of the province. It is located along the Trans-Canada Highway, Trans-Canada Yellowhead Highway, and has served as the cultural and economic hub of central Saskatchewan since its founding in 1882 as a Temperance movement, Temperance colony. With a Canada 2021 Census, 2021 census population of 266,141, Saskatoon is the List of cities in Saskatchewan, largest city in the province, and the List of census metropolitan areas and agglomerations in Canada, 17th largest Census Metropolitan Area in Canada, with a 2021 census population of 317,480. Saskatoon is home to the University of Saskatchewan, the Meewasin Valley Authority (which protects the South Saskatchewan River and provides for the city's popular riverbank park spaces), and Wanuskewin Heritage Park (a National Historic Site of Canada and UNES ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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