Advertisement The spiders of this genus (along with the recluse spiders) have potent tissue-destroying venoms containing the dermonecrotic agent, sphingomyelinase D, which is otherwise found only in a few pathogenic bacteria. This venom is highly necrotic in effect, capable of causing lesions (open sores) as large as 2.5 cm in diameter. The genus Sicarius may have more toxic venom than Loxosceles (particularly the African species), based on laboratory experiments with rabbits. Sicariids are found in barren deserts and are able to bury themselves partially in the sand. Because of this, humans seldom come in contact with them. The females produce egg sacs covered with a mixture of sand and silk. The genus is considered to be a living fossil in that it is both quite primitive and distributed in parts of the former Gondwanaland, the huge southern continent that separated during the Mesozoic. A U.S. patent (number 6,998,389) has been awarded for a means for using Sicariidaevenom as a treatment for cancer. The spider you mentioned is milked for That property and is used to improve the blue pill. We all know the one.