Venomous spiders #9 - Atrax Robustus

Scientific Classification:

Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Arachnida
Order:	Araneae
Suborder:	Mygalomorphae
Superfamily:	Hexatheloidea
Family:	Hexathelidae
Genus:	Atrax
Specie:	A. Robustus

Common Name: Australian funnel-web spider, Sydney funnel-web spider.

This spider gives me chill, even me who love spiders. Their color range goes from blue-black to black to brown or dark-plum, the carapace is almost hairless and so looks smooth and glossy sometimes it appers like a toy but unfortunately it's not, they are very agressive when bothered, SO don't bother it if you see one of them just leave it there or call the institute of animals those spiders can be used to medicinal studies. Now, about the symptoms, at the beggining the bite can be very painful due to the acidity of the venom and the size of the of the cheliceras (fang) penetrating the skin, if substantial envenomation occurs, symptoms will occur within minutes and progress rapidly and there can be many of those symptoms like nausea, vomiting, shortness of breath (caused by airway obstruction), agitation, confusion, writhing, grimacing, muscle spasms, pulmonary oedema (of neurogenic or hypertensive origin), metabolic acidosis and extreme hypertension, The final stages of severe envenomation include dilation of the pupils (often fixed), uncontrolled generalised muscle twitching, unconsciousness, elevated intracranial pressure and death. When death occurs it is generally as a result of progressive hypotension or possibly elevated intracranial pressure consequent on cerebral oedema. The average time to onset of envenomation was 28 minutes, you can die in 15 minutes to 3 days, it depends to each to each.



PS. Copypasta something from wikipedia :P