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Phoneutria nigriventer is a species of medically-significant spider in the family Ctenidae, found in the Southern Cone of South America (Brazil, Uruguay, Paraguay, and Argentina). [1] Along with other members of the genus, they are often referred to as Brazilian wandering spiders. [2]
The next time you happen to find yourself lost in a tropical rainforest in South America, resist the urge to pet this spider with 6-inch long legs that are about the size of your hand.
The spiders in the genus can grow to have a leg span of 13 to 18 cm (5 to 7 in). Their body length ranges from 17 to 48 mm (43 ⁄ 64 to 1 + 57 ⁄ 64 in). [4] [5] While some other araneomorph spiders have a longer leg span, the largest Phoneutria species have the longest body and the greatest body weight in this group. [6]
Phoneutria fera is a species of spider with medically significant venom in the family Ctenidae found in South America (Colombia, Ecuador, Peru, Brazil, Suriname, and Guyana). [1] It is commonly known as the Brazilian wandering spider and the banana spider, [ 2 ] although these names are applied to other species in the genus Phoneutria ...
Brazilian Wandering spider was voted as the 2007 most vulnerable animal by Guinness World Records. Not located in the U.S., this species of banana spider gives a painful bite but is rarely fatal.
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Wandering spiders are known to hunt large prey, for example hylid species Dendropsophus branneri. [3] Despite their notoriety for being dangerous, only a few members of Phoneutria have venom known to be hazardous to humans, but the venoms of this family are poorly known, [ 4 ] so all larger ctenids should be treated with caution.
NEUROTOXINS can help the understanding of mechanisms involved in neurotransmission. We here report that two neurotoxin isoforms, Tx3-3 and Tx3-4 obtained from the venom of the spider Phoneutria nigriventer inhibited the 45 Ca 2+ influx in rat cortical synaptosomes induced by the scorpion venom tityustoxin. The IC50 for Tx3-3 and Tx3-4 were 0.32 ...