Sydney funnel - web spider - Wikipedia Sydney funnel - web spider Sydney funnel - web spider Male ( top ) and female Atrax robustus Scientific classification Kingdom : Animalia Phylum : Arthropoda Subphylum : Chelicerata Class : Arachnida Order : Araneae Infraorder : Mygalomorphae Family : Hexathelidae Genus : Atrax Species : A. robustus Binomial name Atrax robustus O.P. - Cambridge, 1877 Synonyms Euctimena tibialis Rainbow, 1914 Poikilomorpha montana Rainbow, 1914 The Sydney funnel - web spider ( Atrax robustus ) is a species of venomous mygalomorph spider native to eastern Australia, usually found within a 100 km ( 62 mi ) radius of Sydney. It is a member of a group of spiders known as Australian funnel - web spiders. Its bite is capable of causing serious injury or death in humans if left untreated. Contents 1 Taxonomy 2 Description 3 Distribution and habitat 4 Behaviour 5 Bites to humans 5.1 Venom 5.2 Antivenom 5.3 Symptoms 6 Treatment 7 References 7.1 Cited texts 8 External links Taxonomy Female Sydney funnel - web spider in a warning posture The Reverend Octavius Pickard - Cambridge was the first to describe the Sydney funnel - web spider, from a female specimen housed in the British Museum in 1877. Establishing the genus Atrax, he named it Atrax robustus. The species name is derived from the Latin robustus `` strong / sturdy / mature ''. Some years later, William Joseph Rainbow described a male Sydney funnel - web as a new species -- Euctimena tibialis -- from a spider he found under a log in Turramurra, and another from Mosman. He coined the scientific name from the Ancient Greek euktimenos `` well built '' and Latin tibialis `` of the tibia '', having noted its prominent tibial spur. In the same paper, he described a female Sydney funnel web as yet another species -- Poikilomorpha montana -- from a specimen collected from Jamison Valley and Wentworth Falls in the Blue Mountains. Its species name was derived from poikilomorphia `` variety of form '' referring to the eyes of different sizes, and montana `` of the mountains ''. In February 1927, a young boy died after being bitten on the hand after playing with a big black spider on the laundry steps of his home in the Sydney suburb of Thornleigh. He fell gravely ill and perished later that evening. Public interest in spiders surged and the police brought the dead spider to the Australian Museum, which Anthony Musgrave identified as Euctimena tibialis. He examined a series of male and female spiders collected around Sydney, and concluded that Euctimena tibialis was the male Atrax robustus due to anatomical similarities and after some males and females had been collected from the same locations. Poikilomorpha montana was classified as the same species in 1988. As of January 2016, Atrax robustus is one of three species of the genus Atrax in the family Hexathelidae. The Sydney funnel - web spider shares its name with some members of the genus Hadronyche. It remains, together with the northern tree funnel - web, the only Australian funnel - web spider known to have inflicted fatal bites on humans. Description male funnel - web, McMasters Beach Further information : Spider anatomy The Sydney funnel - web is medium to large in size, with body length ranging from 1 to 5 cm ( 0.4 to 2 in ). Both sexes are glossy and darkly coloured, ranging from blue - black, to black, to brown or dark - plum coloured. The carapace covering the cephalothorax is almost hairless and appears smooth and glossy. Another characteristic are finger - like spinnerets at the end of their abdomen. The shorter - lived male is smaller than the female but longer legged. The average leg length for the spider in general is six to seven centimeters. Distribution and habitat Distribution is centred on Sydney, extending north to the Central Coast and south to the Illawarra region, and west to the Blue Mountains in New South Wales. The spider can be found in moist microhabitats, including under logs and foliage. Sydney funnel - web spiders are mostly terrestrial spiders, favouring habitats with moist sand and clays. Behaviour Further information : Spider behaviour They typically build silk - lined tubular burrow retreats with collapsed `` tunnels '' or open `` funnel '' entrances from which irregular trip - lines radiate over the ground. In some exceptions, which lack trip - lines but may have trapdoors, the silk entrance tube may be split into two openings, in a Y or T form. Sydney funnel - webs burrow in sheltered habitats where they can find a moist and humid climate, for instance under rocks, logs or borer holes in rough - barked trees. The long - lived female funnel - webs spend most of the time in their silk - lined tubular burrow retreats. When potential prey, which includes insects, lizards or frogs, walks across the trip - lines, they rush out, subduing their prey by injecting their venom. Males, recognized by the modified terminal segment of the palp, tend to wander during the warmer months of the year, looking for receptive females to mate with. This makes encounters with male specimens more likely as they sometimes wander into backyards or houses, or fall into swimming pools. The spiders can survive such immersion for up to twenty - four hours, trapping air bubbles on hairs around their abdomen. The spiders are mainly active at night, as typical day - time conditions would dehydrate them. During the day, they seek cover in cool, moist hideaways. After heavy rain, spider activity is increased as their burrows may be flooded. When threatened or provoked, funnel - web spiders will display aggressive behaviour, rearing up on their hind legs and displaying their fangs. When biting, the funnel - web spiders maintain a tight grip on their victim, often biting repeatedly. Bites to humans Venom Funnel - web spider venom contains a compound known as atracotoxin, an ion channel inhibitor, which makes the venom highly toxic for humans and other primates. However, it does not affect the nervous system of other mammals. These spiders typically deliver a full envenomation when they bite, often striking repeatedly, due to their defensiveness and large chitinous cheliceral fangs. There has been no reported case of severe envenoming by female funnel - web spiders, which is consistent with the finding that the venom of female specimens is less potent than the venom of their male counterparts. In the case of severe envenomation, the time to onset of symptoms is less than one hour, with a study about funnel - web spider bites finding a median time of 28 minutes. This same study revealed that children are at a particular risk of severe funnel - web envenoming, with 42 % of all cases of severe envenoming being children. There is at least one recorded case of a small child dying within 15 minutes of a bite from a Sydney funnel - web spider. Antivenom Main article : Antivenom The antivenom was developed by a team headed by Struan Sutherland at the Commonwealth Serum Laboratories in Melbourne. Since the antivenom became available in 1981, there have been no recorded fatalities from Sydney funnel - web spider bites. In September 2012, it was reported that stocks of antivenom were running low, and members of the public were asked to catch the spiders so that they could be milked for their venom. One dose of antivenom requires around 70 milkings from a spider. As part of its milking programme in January 2016, the Australian Reptile Park received a male Sydney funnel - web spider with a 10 - centimetre ( 4 in ) leg span. The spider was described by the park as the largest specimen that it had seen. Symptoms The bite of a Sydney funnel - web is initially very painful, with clear fang marks separated by several millimetres. The size of fangs is responsible for the initial pain. In some cases the spider will remain attached until dislodged by shaking or flicking it off. Treatment A funnel - web bite is regarded as a medical emergency requiring immediate hospital treatment. Current guidelines for antivenom recommend two vials, or four vials if symptoms of envenomation are severe. Patients are assessed every fifteen minutes, with further vials recommended if symptoms do not resolve. The most vials used to treat a bite is 12. The patient was a 10 - year - old boy who was bitten in February 2017 by a male funnel - web spider hiding in a shoe. References Jump up ^ `` Taxon details Atrax robustus O. Pickard - Cambridge, 1877 '', World Spider Catalog, Natural History Museum Bern, retrieved 21 January 2016 ^ Jump up to : Gray, Michael R. ( 2010 ). `` A revision of the Australian funnel - web spiders ( Hexathelidae : Atracinae ) ''. Records of the Australian Museum. 62 ( 3 ) : 285. doi : 10.3853 / j. 0067 - 1975.62. 2010.1556. Jump up ^ Alcock, MD, MS ;, Joe. `` Funnel Web Spider Envenomation / Pathophysiology ''. Medscape Reference. Retrieved 3 November 2012. CS1 maint : Multiple names : authors list ( link ) Jump up ^ Pickard - Cambridge, Octavius ( 1877 ). `` On some new genera and species of Araneidea ''. Annals and Magazine of Natural History. 4 ( 19 ) : 26 -- 39. Jump up ^ Brunet, Bert ( 1997 ). Spiderwatch : A Guide to Australian Spiders. Reed. p. 91. ISBN 0 - 7301 - 0486 - 9. Jump up ^ Rainbow, William Joseph ( 1914 ). `` Studies in the Australian Araneidae. No. 6. The Terretelariae '' ( PDF ). Records of the Australian Museum. 10 : 187 - 270 ( 248 - 52, 264 - 67 ). doi : 10.3853 / j. 0067 - 1975.10. 1914.901. Jump up ^ Musgrave, Anthony ( 1927 ). `` Some poisonous Australian spiders '' ( PDF ). Records of the Australian Museum. 16 ( 1 ) : 33 -- 46. doi : 10.3853 / j. 0067 - 1975.16. 1927.777. Jump up ^ `` Gen. Atrax O. Pickard - Cambridge, 1877 ''. World Spider Catalog. Natural History Museum Bern. Retrieved 27 January 2016. ^ Jump up to : `` Funnel - web spider '', CSIRO, 14.10. 2011. Retrieved 18 December 2011. ^ Jump up to : Funnel - web Spiders, Australian Museum, Sydney. Retrieved 18 December 2011. ^ Jump up to : `` Massive funnel - web 's spider venom to be milked in Australia ''. BBC News. 25 January 2016. Retrieved 25 January 2016. Jump up ^ Bradley, Richard ( 1993 ). `` Seasonal activity patterns in Sydney funnel - web spiders, Atrax spp. ( Araneae : Hexathelidae ) '' ( PDF ). Bull. Br. arachnol. Soc. 9 ( 6 ) : 189 -- 92. ^ Jump up to : Sydney Funnel - web Spider, Atrax robustus, Australian Museum, Sydney. Retrieved 18 December 2011. Jump up ^ Isbister, Geoffrey K ; Gray, Mike R ( 2004 ). `` Bites by Australian mygalomorph spiders ( Araneae, Mygalomorphae ), including funnel - web spiders ( Atracinae ) and mouse spiders ( Actinopodidae : Missulena spp ) ''. Toxicon. 43 ( 2 ) : 133 -- 40. PMID 15019472. doi : 10.1016 / j. toxicon. 2003.11. 009. ^ Jump up to : `` Australian Spider and Insect Bites '', University of Sydney. Retrieved 18 December 2011. ^ Jump up to : Isbister, GK ; Gray, MR ; Balit, CR ; Raven, RJ ; Stokes, BJ ; Porges, K ; Tankel, AS ; Turner, E ; White, J ; Fisher, MM ( 2005 ). `` Funnel - web spider bite : A systematic review of recorded clinical cases ''. The Medical journal of Australia. 182 ( 8 ) : 407 -- 11. PMID 15850438. Jump up ^ `` Battling illness, Sutherland still works to save lives from stings and bites ''. ABC. 13 May 1999. Retrieved 23 October 2011. Jump up ^ `` Obituary : Struan Keith SutherlandAO MB BS MD DSc FRACP FRCPA ''. The Medical Journal of Australia. January 2002. Retrieved 4 September 2012. Jump up ^ Fisher, M.M. ; Raftos, J. ; McGuinness, R.T. ; Dicks, I.T. ; Wong, J.S. ; Burgess, K.R. ; Sutherland, S.K. ( 1981 ). `` Funnel - web spider ( Atrax robustus ) Antivenom. 2. Early Clinical Experience ''. The Medical Journal of Australia. 2 ( 10 ) : 525 -- 26. PMID 7321948. Jump up ^ `` Anti-Venom Running Low For Deadliest Spider ''. Sky News. 2 September 2012. Retrieved 2 September 2012. Jump up ^ White 2013, p. 190. Jump up ^ Isbister, Geoffrey K ; Fan, Hui Wen ( 2011 ). `` Spider bite ''. The Lancet. 378 ( 9808 ) : 2039 -- 47. PMID 21762981. doi : 10.1016 / S0140 - 6736 ( 10 ) 62230 - 1. Jump up ^ White 2013, p. 182. Jump up ^ White 2013, p. 185. Jump up ^ White 2013, p. 200. Jump up ^ Australian Associated Press. `` Australia 's ' biggest ever ' antivenom dose saves boy bitten by funnel web spider Environment ''. The Guardian. Retrieved 2017 - 02 - 25. Cited texts Sutherland, Struan K. ; Tibballs, James ( 2001 ) ( 1983 ). Australian Animal Toxins ( 2nd ed. ). South Melbourne, Victoria : Oxford University Press. ISBN 0 - 19 - 550643 - X. White, Julian ( 2013 ). A Clinician 's Guide to Australian Venomous Bites and Stings : Incorporating the Updated Antivenom Handbook. Melbourne, Victoria : CSL Ltd. ISBN 978 - 0 - 646 - 57998 - 6. Wikimedia Commons has media related to Atrax robustus. Wikispecies has information related to : Atrax robustus External links `` ' If it has n't killed him, just give him some more ''. The Sydney Morning Herald. 1 April 2006. Account of the first use of the antivenom on a human in 1981. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Sydney_funnel-web_spider&oldid=784038265 '' Categories : Venomous spiders Spiders of Australia Fauna of New South Wales Animals described in 1877 Endemic fauna of Australia Hidden categories : CS1 maint : Multiple names : authors list Use dmy dates from January 2012 Use Australian English from January 2012 All Wikipedia articles written in Australian English Articles with ' species ' microformats Articles containing potentially dated statements from January 2016 All articles containing potentially dated statements Talk Contents About Wikipedia Wikispecies Български Català Cebuano Dansk Deutsch Español فارسی Français Gaeilge Hrvatski Interlingua Italiano עברית Magyar Nederlands 日本 語 Polski Português Русский Simple English Slovenščina Suomi Svenska Tiếng Việt Winaray 中文 Edit links This page was last edited on 6 June 2017, at 03 : 28. 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Question: what's the most deadliest spider in australia
Answer: The Sydney funnel-web spider (Atrax robustus)