Friday, May 12, 2017

Venomous Spiders

Cheiracanthium is a genus of spiders. Certain species are commonly known as the "yellow sac spider".

The Fringed ornamental is a large arboreal tarantula.
The Chinese bird spider is an English name given to several species of old-world tarantulas which are found in China and Vietnam. The spider is also known in English as the earth tiger.

The red-headed mouse spider (Missulena occatoria) is found almost everywhere in Southern Australia, from open forests to desert shrublands.
The brown recluse spider or fiddleback spider (Loxosceles reclusa, Sicariidae) is a spider with a particularly venomous bite.

The redback spider has a widespread distribution in Australia, and inadvertent introductions have led to colonies in New Zealand, Japan, and Belgium. The redback can be seriously harmful to humans.
Latrodectus is a genus of spider, commonly known as widow spiders. The genus contains 32 recognized species distributed worldwide, including the North American black widow. Latrotoxin in black widow venom results in severe muscle pain, abdominal cramps, hyperhidrosis, tachycardia, and muscle spasms. Symptoms usually last for 3–7 days, but may persist for weeks.

The Sydney funnel-web spider (Atrax robustus) is usually found within a 100 km (62 mi) radius of Sydney, New South Wales, Australia. Its venomous bite is capable of causing serious injury or death in humans.
The six-eyed sand spider (Sicarius hahni) is found in deserts and other sandy places in southern Africa. Toxicology studies demonstrate the venom is particularly potent, with a powerful hemolytic/necrotoxic effect, causing blood vessel leakage, thinning of the blood and tissue destruction.

The Brazilian Wandering Spider is the world’s most venomous spider according to the Guinness Book of World Records. It is believed to be responsible for more human deaths than any other spider. The arachnids wander the jungle floor at night.

Their venom is similar to the neurotoxin found in Black Widow Spiders, causing pain, cold sweats and an irregular heart beat. At deadly concentrations it causes loss of muscle control and breathing problems, resulting in paralysis and eventual asphyxiation.