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Thorell, 1869. Diversity. 19 genera, 337 species. 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.
Tangle-web spiders. One genus of the tangle web spiders has venom which is known to be medically significant. This genus, the widow spiders of genus Latrodectus, has caused human fatalities. The other genus, Steatoda, the false widow spiders, have bites that can cause pain and erythema but only around 30% of bites lead to systemic symptoms.
Spiders. A spider bite, also known as arachnidism, is an injury resulting from the bite of a spider. The effects of most bites are not serious. [ 1 ] Most bites result in mild symptoms around the area of the bite. [ 1 ] Rarely they may produce a necrotic skin wound or severe pain. [ 2 ]: 455. Most spiders do not cause bites that are of ...
Description. Uloborus plumipes is a small spider with adult females growing to a length of about 6 mm (0.2 in). The abdomen is truncated and patterned with various irregular tubercles and granulations. The front pair of legs are uneven in appearance with the tibia clothed in dense hairs while the naked terminal segments are very slender.
Leucorchestris kochi. Leucorchestris arenicola, commonly called the dancing white lady spider, is a huntsman spider in the family Sparassidae and genus Leucorchestris. It is commonly found in the Namib desert of Namibia. It is often mistaken with the similarly named Carparachne aureoflava, or more commonly known as the wheel spider from the ...
The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3,000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to their creation of trapdoors over their burrows. Other prominent groups include Australian funnel web ...
Phoneutria nigriventer is a large spider. Its maximum body length is around 5 cm and its legs can span 15 cm in larger individuals. Its body is covered in thick brown hair. [4] They are nocturnal, and actively hunt at night, killing by ambush rather than using a web; during the day, they are found hidden under logs or crevices.
Diversity. 10 genera, 154 species. Nemesiidae is a family of mygalomorph [1] spiders first described by Eugène Simon in 1889, [2] and raised to family status in 1985. Before becoming its own family, it was considered part of "Dipluridae". [3] The family is sometimes referred to as wishbone spiders due to the shape of their burrows.