![]() One study claims that females with egg sacs are slightly more toxic than females without egg sacs. They may lay about 1,000 eggs, which are stored in a silk sac. The female can store the sperm in a chamber separate from the eggs, until she is ready for fertilization. The mating ritual takes place with the male dancing to get the female's attention, with the males even fighting each other. ![]() Reproduction Īs with most spider species, the female is larger than the male. it also occurs in banana trees, foliage, and urban regions, mainly inside residences. When threatened, it raises its first two pairs of legs as a warning. They are nocturnal, and actively hunt at night, killing by ambush rather than using a web during the day, they are found hidden under logs or crevices. Its maximum body length is around 5 cm and its legs can span 15 cm in larger individuals. Phoneutria nigriventer is a large spider. Its bite can cause severe symptoms, including extraordinary pain, increased pulse, blood pressure, and respiratory rate, penile erection (priapism) that lasts for several hours, and in several documented cases, death. ![]() Along with other members of the genus, they are often referred to as Brazilian wandering spiders. 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).
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