Highly dangerous new species of spider has been found

It's been dubbed the 'Big Boy'.

Of course, the new species of the most venomous spider in the world was discovered in the Australian region of New South Wales by Australian Reptile Parks spider expert Kane Christensen in 2018.

Christensen spotted several of the spiders and notified the Australian Museum in Sydney who confirmed the arachnids were a new species.

The spider has been named Atrax Christenseni in honour of the expert who discovered it.

He told 9News: "It's unbelievable. To have a spider that I'm so passionate about named after me is just a dream come true. It's super exciting."

He said the new species, which can grow up to 4.5cm in length can inject more venom into its prey than regular funnel webs found in Sydney.

"The fangs are a lot longer... that could equate possibly to a deeper [penetration] even through a glove... and the amount of venom injected.

"I looked at it and it just blew my mind that the sheer size of it for a male of that species was just... astronomical."

Christensen's discovery put scientists on a long investigation to determine whether the spiders were simply large individuals of the existing species of whether it was an entirely separate funnel web species. 

Their study found that the embolus, part of the spider's body that transfers sperm into a female spider, on the male spider appeared larger and more twisted.

The crucial observation combined with years of DNA analysis confirmed the theory of Dr Michael Gray at the Australian Museum that there are three different types of funnel web. 

Scientists have so far traced the habitat of Atrax christenseni to within 25km of the Newcastle area and it is unlikely the species will venture south to Sydney. 

The other two species are the 'classic' Sydney funnel web also known as Atrax robustus and the Southern Sydney funnel web known as Atrax montanus.

Professor Kristofer Helgen, the director of the Australian Museum Research Institute was excited by what he called a major discovery.

"This is an amazing moment in spider biology, this is the most venomous spider in the world."

The current antivenom used to treat bites from funnel web spiders, which was developed in the 1980s, will be effective against the new species.