Cheiracanthium

Contenidos cheiracanthium a la barra lateral ocultar. Leer Editar Ver historial.

Disclaimer : Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office. Contributors own the copyright to and are solely responsible for contributed content. Click the contributor's name for licensing and usage information. Upcoming Events Registration is open for the BugGuide gathering in Idaho July Moth submissions from National Moth Week Photos of insects and people from the BugGuide gathering in New Mexico , July Photos of insects and people from the Spring gathering in Louisiana , April May 2 Photos of insects and people from the gathering in Louisiana , July Photos of insects and people from the gathering in Virginia , July Previous events. Synonyms and other taxonomic changes.

Cheiracanthium

Generic-looking wandering spider, most often dull yellow in color although abdomen can vary depending upon the color of recently eaten prey. Often with darkened tarsi. Identification may be limited to exclusion of other species. Mature males have a very unique and large basally-projecting spur on the palp, a feature very rare in spiders. In female C. Description: white silk, variable in shape, takes the shape of the void it fills, female makes a retreat and lays sac inside, female stays with sac to guard it, sac dimensions Elsewhere: throughout most of the continental United States and still expanding its range and habitats. Nocturnal hunting spider. Makes a retreat between two leaves or curls a leaf. This spider was uncommon in North America before the s but has since spread across the continent. It has only recently been found in grapes, where it is becoming very common. There may appear to be misspellings of the genus name in the literature. The genus was initially described as Cheiracanthium , but later taxonomists felt that this was an incorrect transformation from Greek to Latin and "corrected" the spelling to Chiracanthium, which was used in publications for many years. However, one cannot change an original spelling unless the name is already assigned to another animal or it was a type-setting error. Hence, Cheiracanthium was reinstated.

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Cheiracanthium , commonly called yellow sac spiders , is a genus of araneomorph spiders in the family Cheiracanthiidae , and was first described by Carl Ludwig Koch in Both sexes range in size from 5 to 10 millimetres 0. They are unique among common house spiders because their tarsi do not point either outward, like members of Tegenaria , or inward, like members of Araneus , making them easier to identify. Though they are beneficial predators in agricultural fields, they are also known to be mildly venomous to humans. Painful bites may be incurred from species such as C. A theory that these spiders were attracted to the smell of gasoline was involved in a series of consumer vehicle callbacks in which spiderwebs had blocked fuel lines, but it has since been disproven by a study which found that the juvenile yellow sac spiders were attracted to the hose material itself.

Disclaimer : Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office. Contributors own the copyright to and are solely responsible for contributed content. Click the contributor's name for licensing and usage information. Upcoming Events Registration is open for the BugGuide gathering in Idaho July Moth submissions from National Moth Week Photos of insects and people from the BugGuide gathering in New Mexico , July Photos of insects and people from the Spring gathering in Louisiana , April May 2 Photos of insects and people from the gathering in Louisiana , July Photos of insects and people from the gathering in Virginia , July Previous events. Synonyms and other taxonomic changes. See the World Spider Catalog.

Cheiracanthium

The Yellow Sac Spider is one of a group of spiders in North America whose bites are generally considered to be medically significant. The Yellow Sac Spider is very common in most of the United States and is the cause of a lot of spider bites and other unwanted encounters. Yellow Sac Spiders are light yellow to pale yellowish green, sometimes with a orange-brown stripe on top of the abdomen. The cephalothorax fused head and thorax of the Yellow Sac Spider is orange brown to reddish and the abdomen is pale yellow to light grey. Males are more slender, with a slightly larger leg span. The first pair of legs is longer than the fourth. Yellow Sac Spiders have eight similarly-sized dark eyes arranged in two horizontal rows. Yellow Sac Spiders take shelter in flattened silk tubes during the day and move about to hunt during the night. Yellow Sac Spiders often live in houses and can frequently be found crawling upon walls or other vertical surfaces.

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Upcoming Events Registration is open for the BugGuide gathering in Idaho July Moth submissions from National Moth Week Photos of insects and people from the BugGuide gathering in New Mexico , July Photos of insects and people from the Spring gathering in Louisiana , April May 2 Photos of insects and people from the gathering in Louisiana , July Photos of insects and people from the gathering in Virginia , July Previous events. Pickard-Cambridge, — China Yarkand C. Bugguide is hosted by: Printer Friendly Version. There may appear to be misspellings of the genus name in the literature. It is likely that C. Explanation of Names From Greek, meaning "hand spinelet", referring to the backwardly directed process on the cymbium of the male palp. Koch , [1]. Koch, — Mediterranean to Central Asia C. World Spider Catalog Version In other projects. Koch, ".

Cheiracanthium mildei, the northern yellow sac spider is one of the most common spiders in Northeastern America. However, it can be found throughout the entire USA. The yellow sac spider can be identified by its greenish, yellowish color.

Indiana University. Koch, — Africa, Saudi Arabia C. Hence, Cheiracanthium was reinstated. Hogg, B. Biology Nocturnal hunting spider. Current valid name Cheiracanthium mildei L. Isbister, S. There may appear to be misspellings of the genus name in the literature. American Arachnological Society. Cushing, V. Ejemplares macho F y hembra G de Cheiracanthium auriculatum. Synonyms and other taxonomic changes. Range C. Vetter, R. If you need expert professional advice, contact your local extension office.