Joined: Jan. 2006
|The brown recluse spider is a venomous spider, Loxosceles reclusa, of the family Sicariidae (formerly of the family Loxoscelidae). It is usually between 1/4 and 3/4 inch (6.4-19.1mm) but may grow larger. It is brown and usually has markings on the dorsal side of its thorax, with a black line coming from it that looks like a violin with the neck of the violin pointing to the rear of the spider resulting in the nickname "fiddleback spider" or "violin spider". Coloring varies from light tan to brown and the violin marking may not be visible. Since the "violin pattern" is not diagnostic, it is far more important, for purposes of identification, to examine the eyes. Contrary to most spiders, which have 8 eyes, recluse spiders have 6 eyes arranged in pairs (dyads) with one median pair and 2 lateral pairs. Only a few other spiders have 3 pairs of eyes arranged this way (e.g., scytodids), and recluses can be distinguished from these as recluse abdomens have no coloration pattern nor do their legs, which also lack spines.|
The brown recluse spider is native to the United States from the southern Midwest south to the Gulf of Mexico (). The native range lies roughly south of a line from southeastern Nebraska through southern Iowa, Illinois, and Indiana to southwestern Ohio. In the southern states, it is native from central Texas to western Georgia. They are generally not found west of the Rocky Mountains.
Recluse spiders, which also include Mediterranean recluse spider (Loxosceles rufescens), build irregular webs that frequently include a shelter consisting of disorderly threads. Unlike most web weavers, they leave these webs at night to hunt. People get bitten when they unintentionally squeeze them in clothing and bedding.
Got the article on Brown Recluse Spider when I searched for violin spider.
However, note from the link you provided-
|Loxosceles can be grouped into cavernicolous (cave dwelling) and savannah species. One of the three cavernicolous species, Loxosceles parrami, associated with mining areas, has been artificially introduced into Gauteng homes and is responsible for many cases of human envenomations in the area. Loxosceles is uncommon within 20 - 50 kilometres of Cape Town and bites by this spider appear to be translocations.|
Violin spider (Loxosceles sp.)
Loxosceles are free ranging and nocturnal using only a few strands of silk as a retreat in caves or under rocks. Its free-ranging behaviour is what distinguishes it from the Pholcidae that are web-bound. Loxosceles are small with a body length of about 8 mm and long slender legs about 18 mm long. The carapace is relatively flat and slightly longer than wide and most species bear the characteristic dark violin-shaped marking. The cylindrical /oval abdomen is either plain or marked with light and dark patterns. In some species sand particles adhere to the cuticle but not to the same extent as Sicarius.
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