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Metepeira Incrassata
''Metepeira incrassata'', also known as the colonial orb-weaving spider, belongs to the spider family Araneidae and genus Metepeira. They are most famous for their social organization and group living behavior. They are generally found in tropical rainforest and agricultural sites in Mexico, and their habitats tend to be highly productive (high generation rate of biomass). Their group sizes are relatively larger than other colonial spiders, typically ranging from hundreds to thousands of individuals. 99% of the females are observed to participate in colonial living, generally with at least two other individuals. Because most ''M. incrassata'' females are communal, the colonies are often dominated by larger males. There is minimal sexual dimorphism observed in ''M. incrassata''. Unlike other orb-weaver spiders, ''M. incrassata'' builds a colonial web by connecting each spider's individual webs together through semi-permanent framelines. These colonial webs of ''M. incrassata'' are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orb-weaver Spider
Orb-weaver spiders are members of the spider family Araneidae. They are the most common group of builders of spiral wheel-shaped webs often found in gardens, fields, and forests. The English word "orb" can mean "circular", hence the English name of the group. Araneids have eight similar eyes, hairy or spiny legs, and no stridulating organs. The family has a cosmopolitan distribution, including many well-known large or brightly colored garden spiders. With 3,108 species in 186 genera worldwide, the Araneidae comprise the third-largest family of spiders (behind the Salticidae and Linyphiidae). Araneid webs are constructed in a stereotypical fashion, where a framework of nonsticky silk is built up before the spider adds a final spiral of silk covered in sticky droplets. Orb webs are also produced by members of other spider families. The long-jawed orb weavers (Tetragnathidae) were formerly included in the Araneidae; they are closely related, being part of the superfamily Arane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortín De Las Flores
Fortín de las Flores is a city in the Mexican state of Veracruz. Fortín de las Flores is the municipal seat of Fortín municipality, which borders the municipalities of Córdoba, Naranjal and Ixtaczoquitlán. It stands on Federal Highways 190 and 180 and the Mexico City to Veracruz railway. In the 2005 INEGI Census, the city reported a total population of 18,965, with 53,311 in the surrounding municipality. The ravine of Metlac, which borders the Cañón del Río Blanco National Park, is the most famous feature of Fortín de las Flores. The residents of Fortín de las Flores are considered by freighthopping Central American migrants to be some of the most generous in Mexico. Fortín de las Flores is home to many insects due to its pleasant weather all year round, with minimal fluctuation in temperature, ranging from 20-32 °C daily. Most notably, it serves as a significant habitat for the Mexican colonial orb-weaving spider, ''Metepeira incrassata ''Metepeira incr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneidae
Orb-weaver spiders are members of the spider family Araneidae. They are the most common group of builders of spiral wheel-shaped webs often found in gardens, fields, and forests. The English word "orb" can mean "circular", hence the English name of the group. Araneids have eight similar eyes, hairy or spiny legs, and no stridulating organs. The family has a cosmopolitan distribution, including many well-known large or brightly colored garden spiders. With 3,108 species in 186 genera worldwide, the Araneidae comprise the third-largest family of spiders (behind the Salticidae and Linyphiidae). Araneid webs are constructed in a stereotypical fashion, where a framework of nonsticky silk is built up before the spider adds a final spiral of silk covered in sticky droplets. Orb webs are also produced by members of other spider families. The long-jawed orb weavers (Tetragnathidae) were formerly included in the Araneidae; they are closely related, being part of the superfamily Araneo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argyrodes
''Argyrodes'', also called dewdrop spiders, is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1864. They occur worldwide, and are best known for their kleptoparasitism. They can spin their own webs, but tend to invade and reside in their hosts' webs. This relationship can be commensal or even mutual if the dewdrop spider feeds on small trapped insects that are not eaten by the host.Tso 2000 Some species can even prey upon the host.Guarisco 1999 The genus name is a combination of the Ancient Greek " argyros" (), meaning "silver", and the suffix "-odes", meaning "like". Description Most species are relatively small, and many are black with silvery markings. '' A. incursus'' has a body length of , while '' A. fissifrons'' has a body length of about . The body has a characteristic conical or triangle shape with a shorter third pair of legs, common in web dwelling spiders. The silver coloration of ''Argyrodes'' may be able to attract moths and oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephila Clavipes
''Trichonephila clavipes'' (formerly known as ''Nephila clavipes''), commonly known as the golden silk orb-weaver, golden silk spider, or banana spider (a name shared with several others), is an orb-weaving spider species which inhabits forests and wooded areas ranging from the southern US to Argentina. It is indigenous to both continental North and South America. Known for the golden color of their silk, the large size of their females, and their distinctive red-brown and yellow coloring, ''T. clavipes'' construct large, asymmetrical circular webs attached to trees and low shrubs in woods to catch small- and medium-size flying prey, mostly insects. They are excellent web-builders, producing and utilizing seven different types of silk, and they subdue their prey by injecting them with venom, as opposed to related species which immobilize their prey by wrapping them in silk first. They are not known to be aggressive towards humans, only biting out of self-defense if touched, and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mecynogea
''Mecynogea'' is a genus of Araneidae, orb-weaver spiders first described by Eugène Simon in 1903. The name is derived from the Greek mekyno (μηυνω), meaning "to lengthen", and "gea" (γεα), meaning "earth". Species it contains nine species in the Americas: *''Mecynogea apatzingan'' Herbert Walter Levi, Levi, 1997 – Mexico *''Mecynogea bigibba'' Simon, 1903 – Brazil, Uruguay *''Mecynogea buique'' Levi, 1997 – Brazil *''Mecynogea erythromela'' (Holmberg, 1876) – Brazil, Paraguay, Argentina, Chile *''Mecynogea infelix'' (Soares & Hélio Ferraz de Almeida Camargo, Camargo, 1948) – Colombia, Brazil *''Mecynogea lemniscata'' (Charles Athanase Walckenaer, Walckenaer, 1841) – USA to Argentina *''Mecynogea martiana'' (Allan Frost Archer, Archer, 1958) – Cuba, Hispaniola *''Mecynogea ocosingo'' Levi, 1997 – Mexico *''Mecynogea sucre'' Levi, 1997 – Venezuela, Brazil References Araneidae Araneomorphae genera Spiders of North America Spiders of South Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucauge
''Leucauge'' () is a spider genus of long-jawed orb weavers, with over 160 species and fully pantropical distribution. The genus was first documented in Scottish zoologist Adam White's 1841 ''Description of new or little known Arachnida''. Charles Darwin had suggested the name of the genus and collected the first specimen in May 1832, later named ''L. argyrobapta''. A vague description and the loss of the only specimen left the genus ill-defined. ''Leucauge'' developed into something of a wastebasket taxon containing 300 loosely related species, until research in the year 2010 resolved ''L. argyrobapta'' as a synonym of the quite common '' L. venusta'' and allowed revision and reclassing of the genus. However, a 2018 paper restored ''Leucauge argyrobapta'' as a separate species. The body and leg shapes and the silver, black and yellow markings of ''Leucauge'' females make identification of the genus relatively easy. They have two rows of long, slender curved hairs on the femu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gasteracantha Cancriformis
''Gasteracantha cancriformis'' (spinybacked orbweaver) is a species of orb-weaver spider (family Araneidae). It is widely distributed in the New World. The genus name ''Gasteracantha'' derives from the Greek words (', "belly") and (', "thorn"), while the specific epithet ''cancriformis'' derives from the Latin words ' ("crab") and ' ("shape, form, appearance"). Description Females are long and wide. The six abdominal spine-like projections on the abdomen are characteristic. The carapace, legs, and underside are black with white spots under the abdomen. Variations occur in the colour of the upperside of the abdomen - a white or yellow colour with both featuring black spots. A white upper side can have either red or black spines while a yellow upperbside can only have black ones. Like with many other spiders, males are much smaller (2 to 3 mm long) and longer than wide. All morphs have six abdominal spines. They are similar to the females in colour, but have a gray abdo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micrathena Gracilis
''Micrathena gracilis'' is a spider in the family Araneidae (orb-weavers), commonly known as the spined micrathena or castleback orbweaver. This spider spins a moderately large (can be about 20 cm long in diameter) and very tightly coiled web. The spiders themselves are small and can be found to be anywhere from 4.2 mm to 10.8 mm long. Its venom is harmless to humans. ''M. gracilis'' is unique in appearance due to its large spiky abdomen and black and white bodies. Certain spiders of this species can also display a yellow color on the sides of their bodies. These spiders can be seen most active during the end of the summer and beginning of fall. ''M. gracilis'' is diurnal and are rarely ever seen active at night. Physical characteristics Females are 8–10 mm long. They exhibit a bulbous abdomen with spines. Males exhibit a fair amount of sexual dimorphism Sexual dimorphism is the condition where the sexes of the same animal and/or plant sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coxal Gland
The coxal gland is a gland found in some arthropods, for collecting and excreting urine. They are found in all arachnids (with the exception of some Acari), and in other chelicerates, such as horseshoe crabs. The coxal gland is thought to be homologous with the antennal gland of crustaceans. The gland consists of an end sac (''saccule''), a long duct (''labyrinth'') and a terminal bladder (''reservoir''). There is generally only one pair (two in some spiders), and they open on the coxae of the walking legs. The coxal secretion of adult female ticks of ''Ornithodoros erraticus'' contains a sex pheromone. Excretory System The excretory system of the prawn lacks a true kidney. The following parts are found in its excretory system: * Antennal or green glands: A pair of enteric glands are found in the coxa (Grap) of each antenna. They are green in color, hence the name "green gland." The antennal gland consists of four regions: ** End sac: This is the smallest part which is bean-sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metepeira
''Metepeira'' is a genus of orb-weaver spiders first described by F. O. Pickard-Cambridge in 1903. The name is derived from the Ancient Greek μετά and the obsolete genus name '' Epeira'', denoting a genus similar to ''Epeira''. Species it contains forty-four species found from Argentina to Canada, including Caribbean islands: *'' Metepeira arizonica'' Chamberlin & Ivie, 1942 – USA, Mexico *'' Metepeira atascadero'' Piel, 2001 – Mexico *'' Metepeira bengryi'' (Archer, 1958) – Jamaica *''Metepeira brunneiceps'' Caporiacco, 1954 – French Guiana *'' Metepeira cajabamba'' Piel, 2001 – Ecuador, Peru *''Metepeira calamuchita'' Piel, 2001 – Argentina *''Metepeira celestun'' Piel, 2001 – Mexico *''Metepeira chilapae'' Chamberlin & Ivie, 1936 – Mexico *''Metepeira comanche'' Levi, 1977 – USA, Mexico *''Metepeira compsa'' (Chamberlin, 1916) – Puerto Rico to Argentina *''Metepeira crassipes'' Chamberlin & Ivie, 1942 – USA, Mexico *''Metepeira datona'' Chamberlin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedipalp
Pedipalps (commonly shortened to palps or palpi) are the second pair of appendages of chelicerates – a group of arthropods including spiders, scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae ("jaws") and anterior to the first pair of walking legs. Overview Pedipalps are composed of six segments or articles: the coxa, the trochanter, the femur, the short patella, the tibia, and the tarsus. In spiders, the coxae frequently have extensions called maxillae or gnathobases, which function as mouth parts with or without some contribution from the coxae of the anterior legs. The limbs themselves may be simple tactile organs outwardly resembling the legs, as in spiders, or chelate weapons ( pincers) of great size, as in scorpions. The pedipalps of Solifugae are covered in setae, but have not been studied in detail. Comparative studies of pedipalpal morphology may suggest that leg-like pedipalps are primitive in arachnids. At present, the only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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