Which is the world's most poisonous spider?

Answer 1

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This is the one case where the Guinness book of world records is wrong. Before invention of the anti venom the Sydney funnel web claimed an amazing number of lives. Usually small children. One source I read once quoted an estimate of 30% death rate, though I do not believe that accurate. Since the development of the anti venom no lives have been lost. Most bites are caused by the males when they are searching for mates. These spiders can be quite aggressive, actively attacking anyone who gets to close. To make matters worse they inject an unbelievable amount of venom for a spider. They have so much venom that it literally drips freely from the fangs of an agitated spider.

The wandering spider has a more potent venom but injects much less, so the over all effect is less. It is also fairly secretive and non aggressive. Most people bitten by a wandering spider suffer severe fever and weakness for a couple of hours. One of the things that contributed to the fame of the wandering spider is the movie Tarantula where the wandering spiders venom, aggression, and reproductive capacity was greatly exaggerated.

The black widow and relatives inject a far more potent venom. However they only inject a fraction of the amount. In fact a fraction of a drop. It is a nerve toxin. That small amount is enough to cause headaches, fever, dizziness, and weakness for days. However, it is seldom fatal due to the small doses.

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good info, thank you.

Answer 2

It 's an age old question and I'm sure you'd like an answer, well here goes:

This is a rather difficult question to answer as there are actually a number of very venomous spiders in the world, all of which have caused human deaths (in some cases the reported cases are anecdotal rather than scientifically recorded).

Of those, the Black Widow Spider (Lactrodectus mactans) of North America is the most well known of the so-called deadly spiders. Other members of the Lactrodectus family are found throughout many temperate parts of the world, such as Australia where it is known as the Red Back spider and New Zealand where it is known as the Katipo spider.

The Sydney funnel spider (Atrax robustus) of Australia is often quoted as being the spider with the most dangerous venom.

On the other hand; according to the Guinness Book of Records the world’s most venomous spiders is the Brazilian wandering spider (Phoneutria nigriventer).

This spider is believed to have the most active neurotoxic venom of any living spider. Its venom is so potent that only 0.006mg (0.00000021oz) is sufficient to kill a mouse.

Answer 3

Guinness Books of World Records said it was the Brazilian Wandering Spider (Phoneutria nigriventer). This spider is believed to have the most active neurotoxic venom of any living spider. Its venom is so potent that only 0.006mg (0.00000021oz) is sufficient to kill a mouse.

Source(s):

http://arachnophiliac.info/burrow/most_venomous_spider.htm

Answer 4

The most venomous spider in the world is the Brazilian wandering spider also known under its Latin name Phoneutria nigriventer.

The venom from the Brazilian wandering spider is so toxic, that 0.006 mg. of its venom kills a mouse.

The Brazilian wandering spiders appear in the Guinness Book of World Records 2007 for the most venomous animal.

pics:
http://www1.istockphoto.com/file_thumbvi…

http://arachnophiliac.info/burrow/galler…

Answer 5

Brazilian wandering spider (Phoneutria nigriventer)

Answer 6

there are two
if you die when it bites you thats one
and the deadly .44 magnum spider

Answer 7

six-eyed sand spider (Sicarius hahni) is the world's most venomous spider...

It's rare and doesn't bite often (there are no officially recorded bites) but toxicology studies on its venom have shown it to be more dangerous than any other spider in the world

People don't encounter this spider because it lives in the middle of the desert in southern Africa.

Hope this helps.

Source(s):

http://en.wikipedia.org/wiki/Six-eyed_sa…
http://en.wikipedia.org/wiki/Spider_bite…

(for starters)