The Brazilian wandering spider may be small (its only five inches across) it was named the worlds most venomous spider by the Guinness World Records in 2010. The highly aggressive spider is also called the Banana spider because it is often found in bunches of the fruit. Their fondness for hiding in bananas sometimes means an unlucky customer picks one up at the supermarket. In 2009, the Brazilian spider was found at a Whole Foods in Oklahoma.
Poisonous Spiders in Oklahoma. Many species of spiders are common residents of Oklahoma gardens. Nearly all of those species are entirely harmless, but the bites of two spider species found in Oklahoma can cause serious, sometimes even fatal, reactions.