Scientists from Australia and Germany have classified a new, highly venomous species of spider, Atrax christenseni, known as Big Boy. It is very large and highly venomous, with bites that can be fatal.

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.

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.

A larger, more venomous, longer-fanged species of one of the world’s deadliest spiders has been discovered by scientists in Australia...

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

“Big boy” funnel-web was initially discovered in the early 2000s, but has now been officially confirmed by Australian scientists. The new huge variation was named Atrax christenseni in honour of the discovery of the creature in Newcastle - which is over 100 miles from Sydney.

Scientists in Australia have discovered a ‘giant’ species of Sydney funnel-web spider, one of the world’s deadliest. Nicknamed ‘Big Boy’, the species was originally found by Kane Christensen, a spider enthusiast and ex-head of spiders at the Australian Reptile Park. in the early 2000s near Newcastle, 170 km north of Sydney.

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.