The corner spider or spider of the corners (Loxosceles laeta) is a species of spider araneomorfa of the family Sicariidae (before the family Loxoscelidae).
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Many consider it as the most dangerous of the spiders of the Loxosceles genus, and it is known that its bite frequently produces severe systemic reactions, including death.
Many consider it as the most dangerous spider of the Loxosceles genus, and it is known that its bite frequently produces severe systemic reactions, even death is one of the species of Loxosceles; it measures generally from 8 to 30 mm with the legs extended.
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Like most species of Loxosceles, it is brown and has marks on the dorsal side of the thorax with a black line that starts from there and looks like a violin whose neck points to the back of the spider, which gives it its name in English speaking areas, fiddleback spider ("violin spider").
The corner spider inhabits almost all of South America and is found in approximately 41% of urban dwellings and 25% of rural dwellings.
It is possible that the heat awakens her, but it is precisely during the summer time when the corner spider () begins to appear more in homes.
It is small, approximately one centimeter in length of body and 1.5 cm. along its legs, reaching with these extended up to 4.5 cm. It is brown, its thorax is usually lighter than the abdomen and in the form of a violin, the legs are lighter, its abdomen is yellow or greenish yellow with olive appearance. Unlike other spiders it has only three pairs of eyes.
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Most accidents caused by spider bites occur inside the home and at night, mainly in summer, with the bedroom being the most frequent site and limbs the most affected body segments.
1.- The corner spider is not characterized by being aggressive, but bites only in self-defense when they bother or press. Its bite seldom goes unnoticed, since it presents a sharp sensation in the skin, followed by intense pain in the area, but after a period of latency each one presents different manifestations and characteristic evolution.
2.- The bite is expressed with a sharp stinging sensation in the skin, then an intense pain that usually occurs between two to 18 hours later, and increased volume in the area, with formation of vesicles.
3.- Symptoms such as fever, malaise, chills, headaches, and hematuria (urine with blood) may occur. It is advisable to go immediately to an emergency service
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