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Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. [2] As of December 2023, 1,100 species have been identified, with 166 genera. [3] The term "tarantula" is usually used to describe members of the family Theraphosidae, although many other members of the same infraorder (Mygalomorphae) are commonly referred to as "tarantulas" or "false tarantulas".
The bite from an Eastern tarantula is not fatal to a human, but can cause up to six hours of vomiting.The venom can cause death to a dog or cat within thirty minutes. [3] [8]In May 2010 a scientist living near Cooktown, Queensland, was bitten on her right index finger and experienced symptoms never reported before in research literature.
Phoneutria nigriventer, the Brazilian wandering spider (a ctenid spider) is a large brown spider similar to North American wolf spiders in appearance, although somewhat larger. It has a highly toxic venom and is regarded (along with the Australian funnel-web spiders ) as among the most dangerous spiders in the world. [ 6 ]
Spiders do not feed on humans and typically bites occur as a defense mechanism. [20] This can occur from unintentional contact or trapping of the spider. [20] Most spiders have fangs too small to penetrate human skin. [21] Most bites by species large enough for their bites to be noticeable will have no serious medical consequences. [22]
Of all the spiders, black widows pose the greatest health threat to Americans, according to Rick Vetter, PhD, a spider expert in the department of entomology at the University of California ...
The mechanical injury from a spider bite is not a serious concern for humans. Some spider bites do leave a large enough wound that infection may be a concern. However, it is generally the toxicity of spider venom that poses the most risk to human beings; several spiders are known to have venom that can cause injury to humans in the amounts that ...
The Goliath birdeater (Theraphosa blondi) belongs to the tarantula family Theraphosidae.Found in northern South America, it is the largest spider in the world by mass (175 g (6.2 oz)) and body length (up to 13 cm (5.1 in)), and second to the giant huntsman spider by leg span. [1]
While most spiders can deliver venom, only a few pose a threat to humans. ... Venoms from any spider are poisonous and/or toxic to their prey, but most are not poisonous or toxic to humans.” ...