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 cheiracanthium species, cheiracanthium.

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Cheiracanthium

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. The only known species in the New World are C. They can also be found in the lower mainland of British Columbia , Canada. The genus is quite diverse in Africa and at least three or four species are known to occur in Egyptian cotton fields alone. Contents move to sidebar hide. Article Talk. Read Edit View history. Tools Tools. Download as PDF Printable version.

In female C. American Arachnological Society. It is likely that C.

Contenidos mover a la barra lateral ocultar. Leer Editar Ver historial. Herramientas Herramientas. En otros proyectos. Wikimedia Commons Wikiespecies. Ejemplares macho F y hembra G de Cheiracanthium auriculatum. Cheiracanthium abbreviatum Simon , Cheiracanthium aculeatum Simon , Cheiracanthium aden Lotz, Cheiracanthium adjacens O.

Note: this post has been updated to reflect that the yellow sac spiders are now in the family Cheiracanthiidae. At the time of first writing, they were in the family Eutichuridae. The first spider of spider week , squeezing into the 7th-most-likely-to-be-misidentified-as-a-brown-recluse spot despite not even being brown , is the yellow sac spider. This common name may be used to refer to multiple similar-looking species in the genus Cheiracanthium family Cheiracanthiidae. Cheiracanthium inclusum female. Photo: Joe Lapp also known as Spider Joe , used with permission. In North America we have two species: Cheiracanthium inclusum a native species and C. Other names for yellow sac spiders include black-footed spiders, long-legged sac spiders, and yellow house spiders. All are pretty good descriptive names, because Cheiracanthium are indeed long-legged, black-footed, and commonly found in houses.

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.

Skylar sister

Also, Cheiracanthium was in the family Clubionidae for decades but was recently transferred to the Miturgidae. Chiracanthium is considered by the World Spider Catalog as "an unjustified emendation. Bush and L. Cheiracanthium sp. Cushing and V. From Greek, meaning "hand spinelet", referring to the backwardly directed process on the cymbium of the male palp. Revista Brasileira de Entomologia. Clickable Guide. Range C. The genitalia are the best way to identify the two species, as the two species are similar in appearance. World Spider Catalog. Roth eds. Click the contributor's name for licensing and usage information. Explanation of Names From Greek, meaning "hand spinelet", referring to the backwardly directed process on the cymbium of the male palp. American Arachnological Society.

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.

Ubick, P. There may appear to be misspellings of the genus name in the literature. Chiracanthium is considered by the World Spider Catalog as "an unjustified emendation. Pickard-Cambridge, — India C. Introduced to North America, Argentina C. PMID Identification may be limited to exclusion of other species. Contents move to sidebar hide. The only known species in the New World are C. Koch, — Mediterranean to Central Asia C.