Loxosceles intermedia

The male has a total length of 5.3 mm, legs I to IV, have a length of 24.5, 31.8, 20.4 and 23.6 mm, the palp can be 5.4 mm long, females are larger, measuring about 8.5 mm in length, with legs ranging from 15.1, 16.0, 13.1 and 15, 5 mm, the palp of females measures 3.8 mm. Both male and female carapace ranges from dull yellow to orange brown, covered with black and subpretiated bristles. The cephalica pars varies from dark orange-brown to reddish-brown, with a '' U '' shape contrasting with the yellowish pars thoracica. The tubers of the eyes are enlarged, while the lateral marens are not dark, the abdomen is grayish or blackened, with the dorsal part darker than the ventral part, the leg segments vary from orange-brown to reddish-brown.

Loxosceles intermedia is native to Brazil and Argentina. They are found in temperate and warm regions of South America in southeastern and southern Brazil, as well as northern Argentina. They live in dark, very dry cracks, warm regions with elevations below 500 m, quite common around or inside the houses of humans.

It is a very shy spider, with nocturnal habits, building irregular webs under fallen tree trunks and debris, usually in dark places. They can also be found in human environments, in socks, clothes, blankets, wardrobes, garages and among others dark places. Their food, as well as that of several recluse spiders, is based on insects such as cockroaches, crickets and beetles. They have been reported to attack other arthropods such as scorpions. It breeds in the hottest months of the year, laying about 20 eggs taking 46 days for the juveniles to hatch. The female builds a bag-shaped web where the eggs are deposited.