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Atrax christenseni
Large Australian venomous spider From Wikipedia, the free encyclopedia
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The Newcastle funnel-web spider (Atrax christenseni), also known as Newcastle big boy,[2] is a species of venomous mygalomorph funnel-web spider in the family Atracidae, native to an area north of Newcastle in Australia.[2]
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Description
Atrax christenseni is considered a very large species of funnel-web spider, with adult males exhibiting notable size.[2] The largest recorded male individual measured approximately 9.2 cm (3.6 in) across, including the span of the legs, making it one of the largest members of the genus Atrax.[2][1] This considerable size, combined with its potent venom, has contributed to the species’ reputation for being among the most venomous and dangerous spiders in the world.[2] Despite the species’ high venom potency, no fatalities have been documented, largely due to the availability of an effective antivenom.
The antivenom developed for the closely related Sydney funnel-web spider (A. robustus) has been shown to be effective in treating bites from A. christenseni as well.[3] This cross-efficacy is attributed to the biochemical similarity of the venom components among species within the Atrax genus, enabling broader protection through the same medical intervention.
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Taxonomy and naming
The species was formally described as a new species in 2025.[2] Previously, it was thought to be a local subspecies of the Sydney funnel-web.[3]
The specific epithet christenseni honors Kane Christensen, who contributed specimens that led to A. christenseni's recognition as a distinct species.[2]
Distribution and habitat
A. christenseni occurs in the area north of Newcastle, New South Wales, Australia,[2] where it inhabits silk-lined burrows.[4] The exact location of the spider populations are not published, due to conservation concerns and its venom.[5]
References
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