5. Brazilian brown spider, grey recluse spider (Loxosceles similis)
LD50 value: 0.32
This spider that ranks 5th on our list of most venomous spiders in the world is a cousin of the above-mentioned brown recluse, together with whom it is one of the most venomous spiders in the world, and also very dangerous, because bites of this spider are quite frequent in Brazil.
