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Acanthogonatus Tolhuaca
''Acanthogonatus tolhuaca'' is a mygalomorph spider of Chile, named after its type locality: Tolhuaca, Malleco, Region IX (de la Araucania).Goloboff, Pablo A. "A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part 1, Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the AMNH; no. 224." (1995). This species differs from '' A. mulchen'' in its wider sternum, smaller size, and the spermathecae having a more pronounced notch; from '' A. brunneus'', it differs in the uniformly coloured abdomen. Description *Female: total length ; cephalothorax length , width ; cephalic region length , width ; fovea Fovea () (Latin for "pit"; plural foveae ) is a term in anatomy. It refers to a pit or depression in a structure. Human anatomy *Fovea centralis of the retina * Fovea buccalis or Dimple * Fovea of the femoral head * Trochlear fovea of the fr ... width ; medial ocular quadrangle length , width ; labium length , width ; sternu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mygalomorphae
The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to them forming trapdoors over their burrows. Other prominent groups include Australian funnel web spiders and tarantulas, with the latter accounting for around one third of all mygalomorphs. Description This group of spiders comprises mostly heavy-bodied, stout-legged spiders including tarantulas, Australian funnel-web spiders, mouse spiders, and various families of spiders commonly called trapdoor spiders. Like the " primitive" suborder of spiders Mesothelae, they have two pairs of book lungs, and downward-pointing chelicerae. Because of this, the two groups were once believed to be closely related. Later it was realized that the common ancestors of all spiders had these features (a state known as symplesiomorphy). Following the branching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malleco Province
Malleco Province ( es, Provincia de Malleco) is one of two provinces in the southern Chilean region of La Araucanía (IX). Its population as of the 2017 census is 205,124, and it covers an area of . The provincial capital is the city of Angol. Malleco Province is known for having the emblematic Malleco Viaduct and the Las Raíces Tunnel, Chile's longest tunnel, which links the eastern part to the rest of the province. Communes As one of Chile's second level administrative divisions, Malleco comprises eleven communes, each administered by its respective municipality. * Angol * Renaico * Collipulli * Lonquimay * Curacautín * Ercilla * Victoria * Traiguén * Lumaco * Purén * Los Sauces Geography and demography According to the 2017 census by the National Statistics Institute (''INE''), the province spans an area of and had a population of 205,124 inhabitants (99,811 men and 105,313 women), giving it a population density of . Of these, 151,057 (73.6%) lived in urban areas a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araucania Region
Arauco or Araucanía may refer to: Places * Araucanía Region, an administrative region of Chile, the heartland of the historic region of Araucania * Araucanía (historic region), a historical region of Central Chile also called Arauco * Arauco, Chile, a city and municipality in Arauco Province, Chile * Arauco Peninsula * Arauco Province, a province in the Biobío Region of Chile * Arauco Department, Chile * Arauco, La Rioja, Argentina * Arauco Department, La Rioja, an administrative entity in La Rioja Province, Argentina * Gulf of Arauco, a body of water on the coast of Chile Biology * ''Arauco'' (moth) * ''Araucania'' (wasp) * ''Araucaria araucana'', the Arauco pine Other uses * Celulosa Arauco y Constitución (CELCO), a wood pulp and forestry enterprise in Chile See also * Arauco War The Arauco War was a long-running conflict between colonial Spaniards and the Mapuche people, mostly fought in the Araucanía. The conflict began at first as a reaction to the Spanish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthogonatus Mulchen
''Acanthogonatus mulchen'' is a mygalomorph spider of Chile, named after its type locality: Alto Caledonia, east of Mulchén, Region VIII ( Bío Bío Region).Goloboff, Pablo A. "A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part 1, Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the AMNH; no. 224." (1995). It is recognised by the long, narrow sternum. It differs from '' A. tolhuaca'' in the spermathecae having a less pronounced notch and the glandular areas on each side joining in the middle. It is larger (''A. mulchen'' has a cephalothorax length of up to , and a total length of ) and differs from '' A. brunneus'' by its uniformly colored abdomen. Description *Female: total length ; cephalothorax length , width ; cephalic region length , width ; fovea width ; medial ocular quadrangle length , width ; labium length , width ; sternum length , width . Its cephalic region is wide but low, while its fovea s straight to pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternum
The sternum or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. Shaped roughly like a necktie, it is one of the largest and longest flat bones of the body. Its three regions are the manubrium, the body, and the xiphoid process. The word "sternum" originates from the Ancient Greek στέρνον (stérnon), meaning "chest". Structure The sternum is a narrow, flat bone, forming the middle portion of the front of the chest. The top of the sternum supports the clavicles (collarbones) and its edges join with the costal cartilages of the first two pairs of ribs. The inner surface of the sternum is also the attachment of the sternopericardial ligaments. Its top is also connected to the sternocleidomastoid muscle. The sternum consists of three main parts, listed from the top: * Manubrium * Body (gladiolus) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spermathecae
The spermatheca (pronounced plural: spermathecae ), also called receptaculum seminis (plural: 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 fertilization 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 reproduction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthogonatus Brunneus
''Acanthogonatus'' is a genus of South American mygalomorph spiders in the family Pycnothelidae. It was first described by Ferdinand Anton Franz Karsch in 1880. Originally placed with the brushed trapdoor spiders, it was transferred to the funnel-web trapdoor spiders in 1985, then to the Pycnothelidae in 2020. Species it contains twenty-nine species, found in Uruguay, Peru, Brazil, Argentina, and Chile: *'' Acanthogonatus alegre'' Goloboff, 1995 – Chile *'' Acanthogonatus birabeni'' Goloboff, 1995 – Argentina *'' Acanthogonatus brunneus'' (Nicolet, 1849) – Chile *'' Acanthogonatus campanae'' (Legendre & Calderón, 1984) – Chile *'' Acanthogonatus centralis'' Goloboff, 1995 – Argentina *'' Acanthogonatus chilechico'' Goloboff, 1995 – Chile *'' Acanthogonatus confusus'' Goloboff, 1995 – Chile, Argentina *'' Acanthogonatus ericae'' Indicatti, Lucas, Ott & Brescovit, 2008 – Brazil *'' Acanthogonatus francki'' Karsch, 1880 (type) – Chile *'' Acanthogonatus fuegia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalothorax
The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. (The terms ''prosoma'' and ''opisthosoma'' are equivalent to ''cephalothorax'' and ''abdomen'' in some groups.) The word ''cephalothorax'' is derived from the Greek words for head (, ') and thorax (, '). This fusion of the head and thorax is seen in chelicerates and crustaceans; in other groups, such as the Hexapoda (including insects), the head remains free of the thorax. In horseshoe crabs and many crustaceans, a hard shell called the carapace covers the cephalothorax. Arachnid anatomy Fovea The fovea is the centre of the cephalothorax and is located behind the head (only in spiders).Dalton, Steve (2008). ''Spiders; The Ultimate Predators''. A & C Black, London. P.p. 19. . It is often important in identification. It can be transverse or procurved Smith, A. M. (1990c). Baboon spiders: Tarantulas of Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fovea (spider)
This glossary describes the terms used in formal descriptions of spiders; where applicable these terms are used in describing other arachnids. Links within the glossary are shown . Terms A Abdomen or opisthosoma: One of the two main body parts (tagma (biology), tagmata), located towards the Posterior (anatomy), posterior end; see also Abdomen#Other animals, Abdomen § Other animals Accessory claw: Modified at the tip of the in web-building spiders; used with to grip strands of the web Anal tubercle: A small protuberance (tubercule) above the through which the anus opens Apodeme → Apophysis (plural apophyses): An outgrowth or process changing the general shape of a body part, particularly the appendages; often used in describing the male → Atrium (plural atria): An internal chamber at the entrance to the in female Haplogynae, haplogyne spiders B Bidentate: Having two Book lungs: Respiratory organs on the ventral side (underside) of the , in front of the , open ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelicerae
The chelicerae () are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or similarly to pincers. Some chelicerae, such as those found on nearly all spiders, are hollow and contain (or are connected to) venom glands, and are used to inject venom into prey or a perceived threat. In ''Pisaurina mira'', also known as the nursery web spider, the chelicerae are utilized to snatch the prey once it becomes within reach, facilitating the "sit-and-wait ambush predator" behavior. Both pseudoscorpions and harvestmen have structures on their chelicerae that are used for grooming (papillae in pseudoscorpions, cheliceral teeth in Opiliones). Types Chelicerae can be divided into three kinds: jackknife chelicerae, scissor chelicerae, and 3-segmented chelate chelicerae. Jackknife chelicerae The jackknife chelicera is subchelate (with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pycnothelidae
''Pycnothelidae'' is a family of mygalomorph spiders first described in 1917. It was downgraded to a subfamily of the funnel-web trapdoor spiders in 1985, but returned to family status in 2020. Genera , the World Spider Catalog accepted the following genera: *'' Acanthogonatus'' Karsch, 1880 – South America *''Bayana'' Pérez-Miles, Costa & Montes de Oca, 2014 *''Pionothele ''Pionothele'' is a genus of African mygalomorph spiders in the family Pycnothelidae. It was first described by William Frederick Purcell in 1902. it contains 2 species, found in Namibia and South Africa: '' P. gobabeb'', and '' P. straminea''. ...'' Purcell, 1902 – South Africa, Namibia *'' Pycnothele'' Chamberlin, 1917 – Uruguay, Brazil, Argentina *'' Stanwellia'' Rainbow & Pulleine, 1918 – Australia, New Zealand *'' Stenoterommata'' Holmberg, 1881 – Brazil, Uruguay, Argentina References Mygalomorphae families {{Mygalomorphae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
