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Australian scientists have discovered a bigger, more venomous species of the Sydney funnel-web spider, one of the world's deadliest.

A larger and more venomous species of one of the world's deadliest spiders has been confirmed by Australian scientists. Nicknamed 'big boy', it can grow up to 9cm (3.54 inches) compared with 5cm (1.97 inches) for the more common Sydney funnel-web.

“The Newcastle funnel-web, Atrax christenseni— dubbed Big Boy—is a totally new species. The ‘true’ Sydney Funnel-web, Atrax robustus centres on the North Shore of Sydney and the Central Coast, and the Southern Sydney Funnel-web, Atrax montanus, is a resurrected species name from 1914,” Loria explained.

The first person to discover the Aussie spider, Kane Christensen, has warned people not to approach it, citing its massive fangs and glands that produce 'copious amounts of venom'

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 species, only two of which were previously known to science.

Scientists reveal the Sydney funnel-web spider is actually three distinct species, with Newcastle's "Big Boy" reigning supreme.

The deadly 3.54-inch-long spider Atrax christenseni is among the most dangerously venomous spiders for humans.

Scientists in Australia have discovered a larger, more venomous species of one of the world's deadliest spiders, the Sydney funnel-web spider.

Australia's reputation for venomous spiders comes partly from the deadly Sydney funnel-web. It turns out there is not just one species, there are three.