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Phoneutria nigriventer, the Brazilian wandering spider (a ctenid spider) is a large brown spider similar to North American wolf spiders in appearance, although somewhat larger. It has a highly toxic venom and is regarded (along with the Australian funnel-web spiders ) as among the most dangerous spiders in the world. [ 6 ]
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]
The Newcastle funnel-web spider (Atrax christenseni) is a species of venomous mygalomorph funnel-web spider of the family Atracidae, native to an area north of Newcastle in Australia. [2] Large male specimens have led to the nickname Newcastle big boys .
Researchers say they used anatomical and DNA comparisons to study different populations of the Sydney funnel-web spider – one of the world’s deadliest spiders – and found there were three ...
Yellow sac spiders are often found in the Seattle area and eastern Washington. They can be yellow, white or greenish and their bodies are only about a quarter- to a half-inch long. These spiders ...
Venom from the male Sydney funnel-web spider (A. robustus) is used in producing the antivenom, but it appears to be effective against the venom of all species of atracids. [29] Australian funnel-web spider antivenom has also been shown, in vitro, to reverse the effects of eastern mouse spider (Missulena bradleyi) venom. [30]
These spiders are brown in color with long legs attached to a body of roughly 9 millimeters in length, Penn State Extension writes. Brown recluse spiders sport three pairs of eyes arranged in a ...
The spiders in the genus can grow to have a leg span of 13 to 18 cm (5 to 7 in). Their body length ranges from 17 to 48 mm (43 ⁄ 64 to 1 + 57 ⁄ 64 in). [4] [5] While some other araneomorph spiders have a longer leg span, the largest Phoneutria species have the longest body and the greatest body weight in this group. [6]