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Araneus
''Araneus'' is a genus of common orb-weaving spiders. It includes about 650 species, among which are the European garden spider and the barn spider. The genus was erected by Carl Alexander Clerck in 1757. Description Spiders of this genus present perhaps the most obvious case of sexual dimorphism among all of the orb-weaver family, with males being normally to the size of females. In ''A. diadematus'', for example, last-molt females can reach the body size up to 1 in (2.5 cm), while most males seldom grow over 0.3 in (1 cm), both excluding leg span. Males are differentiated from females by a much smaller and more elongated abdomen, longer legs, and the inability to catch or consume prey bigger than themselves. In females, the epigyne has a long scape (a tongue-like appendage). Male pedipalps have a hook-like terminal Tubercle (anatomy), apophysis. Abdominal tubercle (anatomy), tubercles are present anterolaterally. Taxonomic history ''Araneus'' was, for m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneus Angulatus
''Araneus angulatus'' is a species of orb-weaving spiders found in the Palearctic realm. It resembles the European garden spider, ''Araneus diadematus'', but has distinctive tubercles on its abdomen. The species was first described in ''Aranei Svecici'' in 1757, where it was the first species described, making ''Araneus angulatus'' the first scientific name of an animal that is still in use. Description ''Araneus angulatus'' closely resembles the more frequently encountered European garden spider, ''Araneus diadematus'', but can be distinguished by the presence of angular tubercles on the abdomen. Distribution ''Araneus angulatus'' is found across a wide geographical range in the Palearctic realm. It is widespread in Europe, although rarer in Northern Europe. ''A. angulatus'' is rare in the United Kingdom, where it is restricted to areas near the South coast of England. Subspecies Six subspecies are currently recognized: * ''Araneus angulatus afolius'' (Franganillo, 1909) — ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneus Diadematus
The spider species ''Araneus diadematus'' is commonly called the European garden spider, cross orbweaver, diadem spider, orangie, cross spider, and crowned orb weaver. It is sometimes called the pumpkin spider, although this name is also used for a different species, '' Araneus marmoreus''. It is an orb-weaver spider found in Europe, where it is native, and North America, where it was introduced. Range ''A. diadematus'' has a holarctic distribution throughout Europe and across North America, from southern Canada to Mexico, and from British Columbia to Newfoundland.Cross Spider Washington NatureMapping Project Size and markings [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneus Quadratus
''Araneus quadratus'', the four-spot orb-weaver, is a common orb-weaver spider found in Europe and Central Asia, and as far as the Kamchatka Peninsula and Japan. Females can reach 17 mm in length, especially when gravid, with males around half that. They are quite variable in appearance, ranging from brown to bright orange or green, but they always have the characteristic four white spots on the abdomen. The darker color morphs are easier to identify, due to the contrast between the white spots and the rest of the body. The legs are sometimes brightly striped. The spider lives in gardens, wooded areas, or wherever there is vegetation to string an orb web across. This species builds its web close to the ground to catch jumping insects such as small grasshoppers Grasshoppers are a group of insects belonging to the suborder Caelifera. They are amongst what are possibly the most ancient living groups of chewing herbivorous insects, dating back to the early Triassic around ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barn Spider
The barn spider (''Araneus cavaticus'') is a common orb-weaver spider native to North America. They are around three-quarters of an inch (20 mm) in length and are usually yellow and brown in color. They often construct their webs in wooden human structures, hence their common name. The species is notable for being the basis for the character Charlotte in the book ''Charlotte's Web'' by American writer E. B. White. Description Barn spiders are predominantly yellow and brown in coloration with striped legs. Their undersides are typically black with white marks inside, although color ranges can be quite variable. They are about three-quarters of an inch (20 mm) long but can grow up to and above an inch (25 mm) long with large, round abdomens. This species displays sexual dimorphism, and, like most orb-weaver spiders, the females are significantly larger than the males. Ecology and behavior Barn spiders are nocturnal, constructing (under cover of darkness) a web wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Alexander Clerck
Carl Alexander Clerck (1709 – 22 July 1765) was a Sweden, Swedish entomologist and arachnology, arachnologist. Clerck came from a family in the petty Swedish nobility, nobility and entered the University of Uppsala in 1726. Little is known of his studies; although a contemporary of Carl Linnaeus, Linnaeus, it is unknown whether he had any contact with him during his time in Uppsala. His limited means forced him to leave university early and enter into government service, later ending up working in the administration of the City of Stockholm. His interest in natural history appears to have come at a more mature age, influenced by a lecture of Linnaeus he attended in Stockholm in 1739. In the following years he collected and categorized many spiders, published together with more general observations on the morphology and behaviour of spiders, in his ''Svenska Spindlar'' ("Swedish spiders", 1757, also known by its Latin subtitle, ''Aranei Suecici''). He also started the publication ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orb-weaving 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 one of the largest family of spiders (with 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 Araneoid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epigyne
The epigyne or epigynum is the external genital structure of female spiders. As the epigyne varies greatly in form in different species, even in closely related ones, it often provides the most distinctive characteristic for recognizing species. It consists of a small, hardened portion of the exoskeleton located on the underside of the abdomen, in front of the epigastric furrow and between the epigastric plates. Functions The primary function of the epigyne is to receive and direct the palpal organ of the male during copulation. The various specific forms of epigynes are correlated, in each case, with corresponding specific differences in the palpus of the male. This specialization prevents individuals of different species from mating. The epigyne covers or accompanies the openings of the spermathecae, which are pouches for receiving and retaining sperm. Frequently, the openings of the spermathecae are on the outer face of the epigyne and can be easily seen. A secondary funct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippolyte Lucas
Pierre-Hippolyte Lucas (17 January 1814 – 5 July 1899) was a French entomologist. Lucas was an assistant-naturalist at the Muséum national d'Histoire naturelle. From 1839 to 1842 he studied fauna as part of the scientific commission on the exploration of Algeria. His brother was Prosper Lucas. Works * ''Histoire naturelle des lépidoptères exotiques. Ouvrage orné de 200 figures peintes d'après nature par Pauquet et gravées sur acier''. Paris, Pauquet, Bibliothèque Zoologique, 1835. * ''Histoire naturelle des animaux articulés. Exploration scientifique de l'Algérie, pendant les années 1840, 1841 et 1842''. Paris, Imprimerie Nationale (1844–1849). Published in 25 volumes this work contains 122 fine engraved plates. * "Description de nouvelles Espèces de Lépidoptères appartenant aux Collections entomologiques du Musée de Paris". ''Revue et magasin de zoologie pure et appliquée''. (2) 4 (3): 128–141 (1852) 4 (4): 189–198 (1852) 4 (6): 290–300 (1852) 4 (7): 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nurscia Albomaculata
''Nurscia'' is a genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ... of spiders in the family Titanoecidae. It is a relatively widespread genus with species being found in both Europe and Asia. Species * '' Nurscia albofasciata'' (Strand, 1907) — Russia, China, Korea, Taiwan, Japan * '' Nurscia albomaculata'' (Lucas, 1846) — Europe to Central Asia * '' Nurscia albosignata'' Simon, 1874 — Bulgaria, Cyprus to Central Asia * '' Nurscia sequerai'' (Simon, 1892) — Portugal to France References Titanoecidae Araneomorphae genera Spiders of Europe Spiders of Asia {{Titanoecidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uloboridae
Uloboridae is a family of non- venomous spiders, known as cribellate orb weavers or hackled orb weavers. Their lack of venom glands is a secondarily evolved trait. Instead, they wrap their prey thoroughly in silk, cover it in regurgitated digestive enzymes, and then ingest the liquified body. Description They are medium to large spiders, with three claws, which lack venomous glands. They build a spiral web using cribellate silk, which is quite fuzzy. They are usually dull in color, and are able to camouflage well into their surroundings. They typically have a humped opisthosoma, which is notoriously more humped than the carapace. Their rear eyes tend to curve, more so in some species than others. Most uloborid spiders have eight eyes, but the genus '' Miagrammopes'' has only four. Hunting The hunting method of these spiders is quite unique among all animals in the kingdom. These spiders do not use an adhesive on their orb webs, but rather the very fine cribellate fibers on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
