|
Social Spider
A social spider is a spider species whose individuals form relatively long-lasting aggregations. Whereas most spiders are solitary and even aggressive toward other members of their own species, some hundreds of species in several families show a tendency to live in groups, often referred to as colonies. Spider sociality Most species of social spiders live in the tropical regions of the world where size and density of their prey — insects — is highest. But several species reach into the eastern United States and other temperate areas. By building a communal web, it is thought that the spiders approximately maximize total biomass capture per spider. Having a larger web and multiple spiders to work together to subdue prey allows them to prey on larger organisms than would be possible if they led a solitary existence. The colonies can grow large enough to take down birds and bats, as well as very large insects. Living in a colony also has another major benefit for spiders: c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, 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 for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mallos Gregalis
''Mallos gregalis'' is a spider species belonging to the family Dictynidae. It is endemic to Mexico. Discovered by French naturalists in the previous century, ''M. gregalis'' were again brought to light in the 1970s by Wes Burgess through his research on their social lifestyle. ''M. gregalis'' live in groups containing thousands of individuals together on a sheet-like spider web. Like other social spiders, the unique qualities of ''M. gregalis web help make their social lifestyle possible. Their web preferentially transmits the vibrations of flies Flies are insects of the order Diptera, the name being derived from the Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwings having evolved into advanced m ... caught in the web while dampening out the vibrations caused by other spiders, thus allowing the ''M. gregalis'' spiders to distinguish between the prey and each other. The smell of previ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orb-weaver Spider
Orb-weaver spiders are members of the spider family (biology), family Araneidae. They are the most common group of builders of spiral wheel-shaped spider web, 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 stridulation, stridulating organs. The family has a cosmopolitan distribution, including many well-known large or brightly colored garden spiders. With 3,108 species in 186 genus, 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 spider silk, silk is built up before the spider adds a final spiral of silk covered in sticky droplets. Spider web#Orb web construction, Orb webs are also produced by members of other spider families. The long-jawed orb weavers (Tetragnathidae) were former ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agelena Republicana
Agelena is a genus of agelenid spiders first described by Charles Athanase Walckenaer in 1805. Sometimes referred to as Eurasian grass spiders, they trap their prey by weaving entangling non-sticky funnel webs. They are limited to the Old world, occurring from Africa to Japan. Many species have been moved to other genera, particularly to ''Allagelena'', '' Benoitia'' and ''Mistaria''. ''Agelena limbata'' is one of the most common web-weaving spider species in Japan. Species , the World Spider Catalog accepted 46 species: *'' Agelena annulipedella'' Strand, 1913 — Central Africa *''Agelena atlantea'' Fage, 1938 — Morocco *'' Agelena australis'' Simon, 1896 — South Africa *'' Agelena babai'' Tanikawa, 2005 — Japan *'' Agelena barunae'' Tikader, 1970 — India *'' Agelena borbonica'' Vinson, 1863 — Réunion *'' Agelena canariensis'' Lucas, 1838 — Canary Is., Morocco, Algeria *'' Agelena chayu'' Zhang, Zhu & Song, 2005 — China *'' Agelena choi'' Paik, 1965 — Kore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider Community Nest In Kruger National Park 02
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, 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 for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenoptera
Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, in addition to over 2,000 extinct ones. Many of the species are parasitic. Females typically have a special ovipositor for inserting eggs into hosts or places that are otherwise inaccessible. This ovipositor is often modified into a stinger. The young develop through holometabolism (complete metamorphosis)—that is, they have a wormlike larval stage and an inactive pupal stage before they mature. Etymology The name Hymenoptera refers to the wings of the insects, but the original derivation is ambiguous. All references agree that the derivation involves the Ancient Greek πτερόν (''pteron'') for wing. The Ancient Greek ὑμήν (''hymen'') for membrane provides a plausible etymology for the term because species in this order have membranous wings. However, a key characteristic of this order is that the hindwings are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasteatoda Wau
''Parasteatoda wau'' (formerly ''Achaeareanea wau'') is a species of social spider that lives around Wau, Papua New Guinea Wau is a town in Papua New Guinea, in the province of Morobe. It has a population of approx 5,000 and is situated at an altitude of around 1100 metres. Wau was the site of a gold rush during the 1920s and 30s when prospective gold diggers arrived .... The spider exhibits a complex dispersal behavior akin to swarming in social bees. It was first described by Herb Levi, Yael Lubin, and M.H. Robinson in 1982.Levi, H. W., Y. D. Lubin & M. H. Robinson. (1982) Two new ''Achaearanea'' species from Papua New Guinea with notes on other theridiid spiders (Araneae: Theridiidae)., ''Pacif. Insects'' 24: 105-113. Colony structure A ''P. wau'' colony consists of a flat, horizontal web, made of mesh silk, and a tangle of vertical silk strands forming a barrier. Insects fly into this barrier and fall to the mesh web, where the spiders capture them and feed on them. Su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stegodyphus
''Stegodyphus'' is a genus of velvet spiders that was first described by Eugène Simon in 1873. They are distributed from Africa to Europe and Asia, with one species (''S. manaus'') found in Brazil. The name is derived from Ancient Greek ('' stegos''), meaning "covered". At least three species are social spiders, and several are known to use ballooning as a method of dispersal. Species it contains twenty species: *''Stegodyphus africanus'' ( Blackwall, 1866) – Africa *''Stegodyphus bicolor'' ( O. Pickard-Cambridge, 1869) – Southern Africa *'' Stegodyphus dufouri'' ( Audouin, 1826) – North, West Africa *''Stegodyphus dumicola'' Pocock, 1898 – Central, Southern Africa *''Stegodyphus hildebrandti ''Stegodyphus'' is a genus of velvet spiders that was first described by Eugène Simon in 1873. They are distributed from Africa to Europe and Asia, with one species (''S. manaus'') found in Brazil. The name is derived from Ancient Greek ( ...'' (Ferdinand Karsch, Kars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eusocial
Eusociality (from Greek εὖ ''eu'' "good" and social), the highest level of organization of sociality, is defined by the following characteristics: cooperative brood care (including care of offspring from other individuals), overlapping generations within a colony of adults, and a division of labor into reproductive and non-reproductive groups. The division of labor creates specialized behavioral groups within an animal society which are sometimes referred to as 'castes'. Eusociality is distinguished from all other social systems because individuals of at least one caste usually lose the ability to perform at least one behavior characteristic of individuals in another caste. Eusocial colonies can be viewed as superorganisms. Eusociality exists in certain insects, crustaceans, and mammals. It is mostly observed and studied in the Hymenoptera ( ants, bees, and wasps) and in Blattodea ( termites). A colony has caste differences: queens and reproductive males take the roles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latrodectus
''Latrodectus'' is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, the diversity of species is much greater. A member of the family Theridiidae, this genus contains 34 species, which include several North American "black widows" (southern black widow ''Latrodectus mactans'', western black widow ''Latrodectus hesperus'', and northern black widow ''Latrodectus variolus''). Besides these, North America also has the red widow ''Latrodectus bishopi'' and the brown widow ''Latrodectus geometricus'', which, in addition to North America, has a much wider geographic distribution. Elsewhere, others include the European black widow (''Latrodectus tredecimguttatus''), the Australian redback black widow (''Latrodectus hasseltii'') and the closely related New Zealand katipō (''Latrodectus katipo''), several differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Widow Spider
''Latrodectus'' is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, the diversity of species is much greater. A member of the family Theridiidae, this genus contains 34 species, which include several North American "black widows" (southern black widow ''Latrodectus mactans'', western black widow ''Latrodectus hesperus'', and northern black widow ''Latrodectus variolus''). Besides these, North America also has the red widow ''Latrodectus bishopi'' and the brown widow ''Latrodectus geometricus'', which, in addition to North America, has a much wider geographic distribution. Elsewhere, others include the European black widow (''Latrodectus tredecimguttatus''), the Australian redback black widow (''Latrodectus hasseltii'') and the closely related New Zealand katipō (''Latrodectus katipo''), several differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bagheera Kiplingi
''Bagheera kiplingi'' is a species of jumping spider found in Central America, including Mexico, Costa Rica, and Guatemala. It is the type species of the genus ''Bagheera'', which includes three other species, including '' B. prosper''.Platnick, Norman I. (2009)The world spider catalog version 10.0. American Museum of Natural History. ''B. kiplingi'' is notable for its peculiar diet, which is mostly herbivorous. No other known species of omnivorous spider has such a markedly herbivorous diet.Milius, Susan (11 August 2008):Vegetarian spider. ''Science News'Vol. 174 No. 5 Meehan, Christopher J.; , Eric J.; , Robert L. (21 August 2008)Exploitation of the Pseudomyrmex–Acacia mutualism by a predominantly vegetarian jumping spider (Bagheera kiplingi) The 93rd ESA Annual Meeting. Taxonomy The genus name is derived from Bagheera, the black panther from Rudyard Kipling's ''The Jungle Book'', with the species name honoring Kipling himself. Other salticid genera with names of Kipling's cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
