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Gonatium Tridentatum
''Gonatium tridentatum'' is a species of dwarf spider in the family Linyphiidae, described in 2025 by Muhammad Irfan, Chang-Cheng Zhang, Yu-Jun Cai, and Zhi-Sheng Zhang. It is endemic to Jiangjin District, Chongqing, China. Diagnostic characteristics ''Gonatium tridentatum'' can be easily recognized by a unique feature in males: a small leg-like structure near their reproductive organ has three distinct tooth-like points, unlike its close relative '' Gonatium japonicum,'' which has only one. Another distinctive trait in males is a long, curved spine shaped like the letter "C", which wraps close to another part of the body called the cymbium, ending slightly beyond it. The cymbium itself is shaped like a hoof with a small bump on the side. Females of this species are identified by their reproductive structures, which include spiral-shaped internal ducts and round, globular organs (spermathecae) where sperm is stored, unlike the more oval shapes found in similar species. Dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linyphiidae
Linyphiidae, spiders commonly known as sheet weavers (from the shape of their webs), or money spiders (in the United Kingdom, Ireland, Australia, New Zealand, and Portugal) is a family of very small spiders comprising 4706 described species in 620 genera worldwide. This makes Linyphiidae the second largest family of spiders after the Salticidae. The family is poorly understood due to their small body size and wide distribution; new genera and species are still being discovered throughout the world. The newest such genus is '' Himalafurca'' from Nepal, formally described in April 2021 by Tanasevitch. Since it is so difficult to identify such tiny spiders, there are regular changes in taxonomy as species are combined or divided. Money spiders are known for drifting through the air via a technique termed " ballooning". Within the agriculture industry, money spiders are regarded as biological control agents against pest species like aphids and springtails. Description In Linyphiid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonatium Japonicum
''Gonatium'' is a genus of dwarf spiders that was first described by Anton Menge in 1868. Species it contains twenty species, found in Algeria, Bulgaria, Canada, China, France, Israel, Italy, Japan, Kazakhstan, Kenya, Korea, Macedonia, Morocco, Portugal, Romania, Russia, Spain, Turkey, and the United States: *''Gonatium arimaense'' Oi, 1960 – Korea, Japan *''Gonatium biimpressum'' Simon, 1884 – France (Corsica), Italy *''Gonatium cappadocium'' Millidge, 1981 – Turkey *''Gonatium crassipalpum'' Bryant, 1933 – USA, Canada *''Gonatium dayense'' Simon, 1884 – Algeria *'' Gonatium ensipotens'' (Simon, 1881) – Portugal, Spain, France, Italy *'' Gonatium geniculosum'' Simon, 1918 – France *'' Gonatium hilare'' ( Thorell, 1875) – Central and southern Europe, Azerbaijan? *'' Gonatium japonicum'' Simon, 1906 – Russia (Far East), China, Korea, Japan *'' Gonatium nemorivagum'' ( O. Pickard-Cambridge, 1875) – Southern Europe *''Gonatium nipponicum'' Millidge, 1981 – R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palpal Bulb
The two palpal bulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of the pedipalps (the front "limbs" of a spider), giving the spider an appearance often described as like wearing boxing gloves. The palpal bulb does not actually produce sperm, being used only to transfer it to the female. Palpal bulbs are only fully developed in adult male spiders and are not completely visible until after the final moult. In the majority of species of spider, the bulbs have complex shapes and are important in identification. Structure The palpal bulb of a mature male spider is borne on the last segment of the pedipalp. This segment usually has touch-sensitive hairs (setae) with nerves leading to them. The bulb itself is entirely without nerves, and hence without sensory organs and muscles, since these depend on nerves for their functioning, although some spiders have one or two muscles external to the bulb and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spermatheca
The spermatheca (pronounced : spermathecae ), also called ''receptaculum seminis'' (: ''receptacula seminis''), is an organ of the female reproductive tract in insects, e.g. ants, bees, some molluscs, Oligochaeta worms and certain other invertebrates and vertebrates. Its purpose is to receive and store sperm from the male or, in the case of hermaphrodites, the male component of the body. Spermathecae can sometimes be the site of fertilisation when the oocytes are sufficiently developed. Some species of animal have multiple spermathecae. For example, certain species of earthworms have four pairs of spermathecae—one pair each in the 6th, 7th, 8th, and 9th segments. The spermathecae receive and store the spermatozoa of another earthworm during copulation. They are lined with epithelium and are variable in shape: some are thin, heavily coiled tubes, while others are vague outpocketings from the main reproductive tract. It is one of the many variations in sexual reproduct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiangjin District
Jiangjin District ( zh, c=江津区, p=Jiāngjīn Qū), one of the districts in the southwest of Chongqing, China, lies along the upper reaches of Yangtze River, and has a history extending back more than 1500 years. The district covers 3200 square kilometres and has a population of 1,359,611 in 2020, and borders the provinces of Sichuan to the southwest and Guizhou to the south. The district government seat of Jiangjin District is away by highway, away by railway and away by waterway from Yuzhong District in central Chongqing. Administrative divisions Jiangjin District administers 25 townships and 5 subdistricts. History Jiangjin enjoys a history of more than 1500 years. Established in 487 C. E., Jiangzhou County was renamed Jiangyang County in 557 C. E. and renamed Jiangyang County in 583 C. E. In 1983, Jiangjin County placed under the administration of Chongqing city. In 1992, the Jiangjin County was promoted to a county-level city. In 2006, the status of Jiangjin county ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chongqing
ChongqingPostal Romanization, Previously romanized as Chungking ();. is a direct-administered municipality in Southwestern China. Chongqing is one of the four direct-administered municipalities under the State Council of the People's Republic of China, Central People's Government, along with Beijing, Shanghai, and Tianjin. It is the only directly administrated municipality located deep inland. The municipality covers a large geographical area roughly the size of Austria, which includes several disjunct urban areas in addition to Chongqing proper. Due to its classification, the municipality of Chongqing is the List of largest cities, largest city proper in the world by population, though Chongqing is not the most populous urban area. The municipality of Chongqing is the only Chinese city with a resident population of over 30 million; however, this number includes its large rural population. In 2020, Chongqing surpassed Shanghai as China's largest municipality by urban populati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after India, representing 17.4% of the world population. China spans the equivalent of five time zones and Borders of China, borders fourteen countries by land across an area of nearly , making it the list of countries and dependencies by area, third-largest country by land area. The country is divided into 33 Province-level divisions of China, province-level divisions: 22 provinces of China, provinces, 5 autonomous regions of China, autonomous regions, 4 direct-administered municipalities of China, municipalities, and 2 semi-autonomous special administrative regions. Beijing is the country's capital, while Shanghai is List of cities in China by population, its most populous city by urban area and largest financial center. Considered one of six ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conifer
Conifers () are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single extant class (biology), class, Pinopsida. All Neontology, extant conifers are perennial plant, perennial woody plants with secondary growth. The majority are trees, though a few are shrubs. Examples include Cedrus, cedars, Pseudotsuga, Douglas-firs, Cupressaceae, cypresses, firs, junipers, Agathis, kauri, larches, pines, Tsuga, hemlocks, Sequoioideae, redwoods, spruces, and Taxaceae, yews.Campbell, Reece, "Phylum Coniferophyta". ''Biology''. 7th ed. 2005. Print. p. 595. As of 2002, Pinophyta contained seven families, 60 to 65 genera, and more than 600 living species. Although the total number of species is relatively small, conifers are ecology, ecologically important. They are the dominant plants over large areas of land, most notably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sifting
A sieve (), fine mesh strainer, or sift is a tool used for separating wanted elements from unwanted material or for controlling the particle size distribution of a sample, using a screen such as a woven mesh or net or perforated sheet material. The word ''sift'' derives from ''sieve''. In cooking, a sifter is used to separate and break up clumps in dry ingredients such as flour, as well as to aerate and combine them. A strainer (see colander), meanwhile, is a form of sieve used to separate suspended solids from a liquid by filtration. Sieving Sieving is a simple technique for separating particles of different sizes. A sieve such as used for sifting flour has very small holes. Coarse particles are separated or broken up by grinding against one another and the screen openings. Depending upon the types of particles to be separated, sieves with different types of holes are used. Sieves are also used to separate stones from sand. Sieving plays an important role in food industri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiders Of China
Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except Antarctica, and have become established in nearly every land habitat. , 53,034 spider species in 136 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel. However, as there is currently neither paleontological nor embryological evidence that spiders ever had a separate th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
