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A number of spiders can cause spider bites that are medically important. Almost all spiders produce venom but only a few are able to cause significant harm to humans. [1] Two medically important spider genera have a worldwide distribution—Latrodectus and Loxosceles. Others have a limited distribution.
The Sydney funnel-web spider (Atrax robustus) is a species of venomous mygalomorph spider native to eastern Australia, usually found within a 100 km (62 mi) radius of Sydney. It is a member of a group of spiders known as Australian funnel-web spiders. Its bite is capable of causing serious illness or death in humans if left untreated. [3]
They have been deemed to be the world's most dangerous spiders on clinical and venom toxicity grounds, [119] though this claim has also been attributed to the Brazilian wandering spider (genus Phoneutria). [124] There were about 100 reliably reported deaths from spider bites in the 20th century, [125] compared to about 1,500 from jellyfish ...
Strictly speaking, all spiders and scorpions possess venom, though only a handful are dangerous to humans. Spiders typically deliver their venom with a bite from piercing, fang-like chelicerae ; scorpions sting their victims with a long, curved stinger mounted on the telson .
These spiders have a distinctive longitudinal groove on the top-rear of their oval carapace similar to those of the Amaurobiidae. [1] They are highly defensive [ 2 ] and venomous nocturnal hunters. Wandering spiders are known to hunt large prey, for example hylid species Dendropsophus branneri . [ 3 ]
Hololena curta, commonly known as corner funnel weaver or funnel web spider, is a species of venomous spiders belonging to a family of Agelenidae. It is native to Canada and the United States. [1] This species and related species produce a venom that contains a group of insecticidal acylpolyamines, insecticidal peptide, [2] and a group of ...
L. tarantula venom is composed mostly of neurotoxins and venom proteins. Their venom shares similarities to other Lycosa spiders, as well as the American Wandering spider, though they are not of the Lycosidae family. While the venom complexity is similar, there are differences in the mass of certain ions and proteins found in male and female venom.
Sicarius is a genus of recluse spiders that is potentially medically significant to humans. It is one of three genera in its family, all venomous spiders known for a bite that can induce loxoscelism. They live in deserts and arid regions of the Neotropics, and females use a mixture of sand and silk when producing egg sacs. The name is Latin for ...