Best Medically Significant
Phoneutria nigriventer, commonly known as the Brazilian wandering spider or armed spider, is a large arachnid native to South America. Unlike many spiders, it does not spin webs to catch prey, preferring to actively hunt on the jungle floor. It is recognized by its defensive rearing posture, where i...
The Sydney funnel-web spider Atrax robustus is a large, aggressive spider native to eastern Australia. It’s notable due to its potent venom, which can cause severe symptoms including myolysis and neurological effects. This medically significant species is particularly dangerous to humans and is most...
The Chilean recluse, scientifically known as Loxosceles laeta, is a highly venomous spider belonging to the family Sicariidae. Native to the western regions of South America, it is considered one of the most dangerous recluse species due to the potency of its hemotoxic venom. Bites from this spider...
The Brazilian wandering spider, *Phoneutria fera*, is a large, venomous spider found throughout South America, primarily in Brazil. It’s notable for its potent neurotoxic venom which can cause severe symptoms including paralysis and death if untreated. This species is medically significant due to it...
The black widow spider (Latrodectus mactans) is a venomous arachnid belonging to the Theridiidae family, commonly known as cobweb spiders. Native to North America, females are easily identified by their glossy black bodies and the distinctive red hourglass marking on the underside of their abdomens....
"Hadronyche cerberea," commonly known as the Illawarra funnel-web spider, is a highly venomous mygalomorph spider native to the New South Wales region of Australia. Like other funnel-web species, it constructs deep, silk-lined burrows in cool, humid microhabitats such as rotting logs or crevices. It...
The redback spider (*Latrodectus hasselti*) is a highly venomous arachnid native to Australia and a member of the widow spider family. The female of the species is distinctly marked by a prominent red or orange stripe on the upper side of her black, bulbous abdomen. They typically build irregular, t...
The Gaucho Recluse is a venomous spider native to South America, particularly Brazil, notable for its necrotic venom and belonging to the same genus as the infamous brown recluse.
The banana spider (Phoneutria nigriventer) is a large, highly venomous arachnid native to South America, particularly Brazil and Argentina. It belongs to a group often referred to as armed spiders or wandering spiders, as they actively hunt on the forest floor at night rather than building webs. The...
The Western Black Widow is a highly venomous spider native to western North America, officially classified by arachnologists Ralph V. Chamberlin and Wilton Ivie in 1935.
The Chilean Recluse Spider is a highly venomous arachnid native to South America, first described by Hercule Nicolet in 1849, known for its severe necrotic bites.
The Blue Mountains Funnel-web Spider is a highly venomous arachnid native to New South Wales, Australia, first described by Octavius Pickard-Cambridge in 1877.
Native to the eastern United States, the Northern Black Widow is a venomous spider first described by Charles Athanase Walckenaer in 1837 with broken red markings.
The Toowoomba Funnel-web Spider is a medically significant arachnid native to eastern Australia, first described by arachnologist Vernon Victor Hickman in 1964.
The Arizona Recluse Spider is a venomous arachnid native to the southwestern United States, first described by arachnologists Willis J. Gertsch and Michael Ennik in 1940.
